New Building Height Regulation Manual
New Building Height Regulation Manual
New Building Height Regulation Manual
(FINAL)
October -2011
1
About this report
The study on the updating of the building height regulation of Addis Ababa has the following
three reports:
1. Report #1: this report is about the review of literature on international and local
experiences
2. Report #2: this report contains all information collected during the one month field work
undertaken by infrastructure team and urban design and planning team in ten sub-cities
and,
3. Report #3: this is the final design report.
Report #3
This is report #3 that presents how the new building height regulation was prepared. It also
presents the various building height regulations assigned to the different sections of the city
according to their potential.
The report is organized in six major parts. Part I presents the introduction and background. Part
II presents the design program development and part III shows the application of the design
program to the context. Part IV is about the design stage (regulation showing the way from
concept to design). This is followed by part V which is about the outcome of the design
regulation showing different city parts with their corresponding building height and finally part VI
presents guideline for implementing the new height regulation of Addis Ababa and some
recommendations.
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Contents
I Introduction ............................................................................................................. 7
3
5.1.2 Sub Centers............................................................................................... 28
5.1.4 Nodes........................................................................................................ 30
Bibliography ............................................................................................................ 65
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List of tables
Table #0: Differentiation of Urban Areas based on common interest implementation potential
Table #1: building height for the CBD
Table #2: building height regulation for the sub centers
Table #3: building height regulation for the tertiary centers
Table #4: building height regulation for the nodes
Table #5: building height regulation for 1st grade development corridors
Table #6: building height regulation for 2nd grade development corridors
Table #7: building height regulation for 3rd grade development corridors
Table #8: building height regulation for the old city core area
Table #9: building height regulation for the buffer zone around the old Minilik palace
Table #10: building height regulation for the transition zone
Table #11: building height regulation for the rest of the city
Table #12: building height regulation along the ring road
Table #113: building footprint for different building types
Table #114: Formulas to determine setbacks
Table #15: building types and areas to be deducted during FAR calculation
Table #16: new Enclosure, Minimum Building Height and FAR for centers, sub centers, tertiary
centers and nodes
Table #:17 new Enclosure, Minimum Building Height and FAR for corridors, historical areas,
transition zones, ring road and the rest of the city
Table #18-formula to determine building setback
Table #19-building height, minimum building frontage and depth
Table #20- building height and minimum street width
Table #21-, minimum street width and maximum FAR
List of diagrams/figures
Diagram #1: building height relation according to the Golden ration
Diagram #2: building height relation according to Van Der Series
Diagram #3: building height according to enclosure principle
Diagram #4: building height and intimate scale
Acronyms
BAR Built up Area Ratio in relation to the plot size
BHR Building Height Regulation
CBD Central Business District
FAR Floor Area Ratio in relation to the plot size
LDP Local Development Plan
TOR Terms of Reference
5
Team members that have participated in this study
GIS expert
17 Alemu Nebebe GIS expert MSc
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I INTRODUCTION
1.1 Background
This document presents a building height regulation updating study made by the EiABC from
June 2010 to December 2010. The study was made based on memorandum of understanding
signed between the institute and Addis Ababa city administration.
According to the TOR summated by the client, the updating of the existing building height
regulation of the city was necessitated by four major reasons
1 The existing building height regulation was prepared in 2001 for a planning period of ten
years which ends in 2011. This means time for the preparation of a new one is that
responds to the current reality of the city
2 The scope of the existing BHR was limited to central parts of the city and along major
development corridors and as a result it couldnt serve as an instrument to regulate
development in many areas of the city that have newly emerged to be major
development areas
3 Even though there have been complaints from stakeholders during the early planning
period that the regulation over-specified in some parts of the city, recently complaints
have turned out to be under-specification and finally,
4 The existing BHR was based on the principles of efficient use of land and infrastructure
and the development of good quality urban environment in general. Its main instruments
were BAR, and number of floors. There is the need to examine whether these principles
as well as the instruments were adequate.
1.2 Objectives
Based on the above rationales, the major objectives of the study were:
To reexamine the principles on which the existing BHR was based on and propose
updated principles during the updating work
To study the existing BHR instruments and update them and finally,
To propose a city wide BHR based on the new principles and instruments.
1.3 Methodology
This study was made by employing three major methods
Literature review
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Stakeholder appraisal
An extensive literature review was conducted to find out international BHR practices and the
principles and instruments on which they are based. Four study teams consisting of economists,
infrastructure experts, urban designers and urban planners were actively involved in reviewing
the local and international experience in relation to building height. The task of the economic
study team was to identify the economic rationalists for regulating the height of buildings in the
city. The infrastructure group was involved in assessing the relation between infrastructures and
building height. The urban design teams major task was to identify design principles that dictate
building height in different cities all over the world. The last team was assigned to investigate the
limitations and potentials of the existing building height regulation of the city government of
Addis Ababa. The findings from this study were used to develop a design program /concept for
the new regulation.
In addition an extensive contextual study was undertaken by dividing the city into ten parts/sub-
cities and using physical survey, observation and interview techniques. The findings of this study
at the sub-city level were used to understand the context for which the regulation is designed
and desired local regulation principles. The later was combined with the findings of the literature
review to complete the development of the design program for the new regulation.
The findings of these two studies were presented to the client for appraisal and feed back. Once
the design program was developed and applied to the context, the result, which was a draft
regulation regulation, was once again presented first to the client and latter to other major
stakeholders for appraisal and feed back. Incorporating the comments given in all the three
encounters, the updated BHR was finalized.
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II DESIGN PROGRAM DEVELOPMENT
The BHR updating task is viewed as building height regulation design. Any design starts with
the development of a program. As explained in the background part, the program for the current
design is developed by reviewing the literature, by conducting contextual study in all parts of AA
and putting together the findings from the two studies.
Government regulates development in order to protect legitimate interests that may be affected
by unregulated developments. On the other hand, private building development occurs only
when legitimate interests of the private developers are assured to be served. These imply that a
BHR must satisfy two major interests: the interest of the regulator (which must be based on the
common interest) and the interest of the developer which can be generally called private
interest.
Different countries often have different national and regional interest because of differences in
history, culture, geographic location and socio-economic development. In addition, cities in
different countries have different urban areas. For example while cities like Addis Ababa have
large slum areas, in American and European cities such areas are quite small. On the other
hand, while many cities in the later have see side and river side areas, this is not the case for
Addis Ababa.
Urban and local interests can also be different among countries partly because of the above
factors. However, there are also many interests that are regarded as uniform at these scales.
These include safety and security, efficiency, equity, esthetics and comfort.
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Safety and security: buildings and urban areas are developed for people and the things they
do. To feel safe from harm is considered one of the basic needs of people. Major threats on the
safety of users include unsafe location of buildings and neighborhoods, structural problems,
motorized traffic, poor lighting and visibility, poor waste management, vulnerability to crime, fire
and seismic hazards, etc.
Efficiency: concerns mainly optimization of the use of resources such as land and
infrastructure. Land is a scarce resource. Infrastructures such as roads are developed with
heavy investments which is also always a scarce resource particular in poor countries like
Ethiopia. Therefore, there is interest to ensure that these resources are used optimally. Optimal
use means preventing both over use of the resources which may entail poor quality life, poor
health, and even disfunctionality. While under use of the resources would entail wastage of the
scarce resources. Of particular importance is optimal use of infrastructure. The capacity of
infrastructure such as road is a determining factor for the volume of development that takes
place in an area (for more detailed information on this issue, see Report #1: infrastructure study)
Equity: is an interest to develop goods, services and resource allocation system that can
provide access to the resources to all socio-economic groups. The market system which is the
dominant system of allocation serves very well the interest of groups with higher social and
economic status. The concern here is, therefore, for those who are on lower social and
economic status. BHR is an instrument of allocation of space for living and working. Unless it is
designed with equity as part of its design program, it can become an impediment to access for
weaker socio economic groups to space for living and working.
Esthetics: is the interest to develop a city with good visual qualities. Concern for visual quality
is regarded as a common concern among all humans. However, good visual quality may not be
a priority of all social groups at all times. Therefore, it is an interest that must be viewed
contextually. A detail analysis on aesthetics is presented in chapter three.
Comfort: it is one other major quality required from buildings and urban areas by its users.
Buildings and spaces are required to meet certain standard of comfort to satisfy users. The
length of time people stay in a public space for example is a function and an indicator of its
comfort. It is a product of satisfaction with a behavior and quality of elements with which users
interact in a space. These elements include air, light, sound, activity, physical elements and
people.
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2.1.2 The private interest
Generally, private interest includes the interests of private individuals and entities. Major Private
Stakeholders in building development include land sellers, financers and developers. The
interest of private entities can be social, economic and use by type. Developers may have
interest in building high for the purpose of advancing their social status, for maximizing profit or
for maximizing satisfaction of need in the case of development for own use. Like the common
interest, private interest intended to be served can be currently existing or future ones.
In a market system, a city normally has many land sellers, financers and developers. These
entities also have different economic and social interests at different times. Therefore, their
individual interests are too many and varied to be represented in a design program. However,
leaving aside the other interest types, economic feasibility of development can be taken as a
shared interest of the private entities. Financers and developers are unlikely to involve in
building developments that are not economically feasible particularly when the developments
are intended for business. Therefore, their interest to do development business and to finance
development is affected if what regulations allow to build are economically infeasible. In the
same way such regulations also affect the interests of land sellers who intend to benefit from the
sale of development land.
Economic feasibility of development is not only a shared interest of private entities but also a
private interest which does not conflict with the common interest. In fact in a market system
much of the economic component of the common interest depends on economic feasibility of
private developments. The critical factor for economic feasibility is not however building height
even though in practice a construction cost increases with height while rent normally decreases.
It is building floor area or area of rentable space. Developers need to build certain minimum
floor area for their development to be economically feasible. They also need to stop building at a
certain maximum floor area for the investment to continue to be feasible.
Therefore, generally speaking for buildings developed for business, the range of building height
regulation must fall within the range of development profit. If the end of the regulation range
(maximum allowed area) is below the beginning of profit for the developer, economically feasible
development may not take place. Conversely, if the regulation range is above the range of profit
for the developer, the same thing will happen (for more detailed information on this issue, see
Report #1: economic studies)
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2.2 Findings of the contextual study
The findings indicate that the national interests with regard to building development and building
height in the city were:
Symbolize the countrys historical and cultural identity and its political and
socio-economic transformation.
Nationally, Addis Ababa is viewed as the diplomatic capital of Africa. This view originates from
factors such as Ethiopias victory over a colonial power and its impact on African independence
movement, its contribution to the independence struggle of many African countries, its
contribution to establishment of the former Organization of African Unity (OAU) with its
headquarter in Addis Ababa and its involvement in African affairs. The recent struggle to
maintain the African unions head quarter in the city, the naming of the streets of the city after
the different African nations, the initiatives taken by the country to represent Africa on climate
change conference, etc all serve this interest.
These roles of the country and the city are highly valued by the Ethiopian people. As a result,
maintaining and enhancing this role (status) was one of the visions of the structure plan of Addis
Ababa. This vision must be supported by informing implementation strategies such as BHR with
this interest.
Cities and their buildings are symbols of the image of a country. In history, countries may
encounter hardships such as civil war, famine and poverty which affect their image. In principle,
however, many countries wish that their cities and buildings symbolize their good image.
Accordingly, there is strong national interest in Ethiopia that its cities and their buildings
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symbolize the countrys historical and cultural identity and the rapid political and socio-economic
transformation in which it is found today.
Efficiency: land and infrastructure use optimization have been two of the major principles in the
preparation of the structure plan and the existing building height regulation. As stated earlier,
while optimization should aim at preventing both underuse and over use, the plans as well as
the regulation were focused mainly on preventing under use of land and infrastructure. As a
result, the existing height regulation is focused on regulating number of floors of buildings which
do not necessarily ensure optimal use of land and infrastructure rather than regulating floor area
of buildings which is an effective instrument. The study indicates that the BAR requirement can
be fulfilled by adjusting a single floor of the building only while the height requirement can be
fulfilled without increasing floor area of the building and increasing land or infrastructure use.
Safety and security: the major concern regarding safety and security has been that of
proposing an appropriate BHR that goes in line with the available means to protect buildings
during natural and artificial catastrophes such as earthquake and fire. At this moment, the fire
brigade department of the city has ladders that reach a maximum of 72 meters which in other
words means 24 stories. The location of the city along or very close to the rife valleys fault line
is another danger that was considered by many as a major threat to the future of building height
in the city. Regarding security, some foreign embassies and the grand Minilik palace had a
strong need to be protected from high rise buildings in their surroundings.
Equity: It is well known that Ethiopias development strategy since the 1974 revolution are
dominated by the interest to maximize the access of weaker socio-economic groups to goods,
services and resources. This interest is currently reflected in urban areas through investment in
housing, health, education and infrastructure. This is a positive trend that must be enhanced
and that must inform urban development plan implementation mechanism such as building
height regulation.
Aesthetics: it has been indicated earlier that even though visual quality is a shared concern
among all humans, it is not however a priority concern in all contexts. In low income residential
and working areas, the priority is for basic services and access to space. However, the existing
BHR did not have the mechanisms to regulate visual quality even in central areas and prime
parts of the city where the concern for visual quality is stronger. The situation is similar in the
case of comfort.
Private interest
The study indicate that private developers interest in building height in Addis Ababa is not
limited to economic or profit maximization but also includes social interests such as fame,
winning competition among friends, etc. However, economic feasibility remains the more un-
compromisable interest.
We have mentioned previously that the major stakeholders of building development and building
height are assumed to be private land sellers, financers and developers. In the Ethiopian
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situation particularly land seller and developer includes government which is also a
development regulator. That implies its role as a regulator is likely to affect its role as land seller
and developer or vice versa. This raises the question: May the government accept a height
regulation that reduces the price of land it sells?. The answer is assumed to be generally yes
because it is assumed that both the regulation and the potential reduction of land price are
intended to serve the common interest which must be the major concern of government.
Division of the city into areas according to their potential and interests they can serve is give in
the table below
Table #0: Differentiation of Urban Areas based on common interest implementation potential
Urban area Implementation Potential
LOW HIGH
Main centre Equity and cultural identity Efficiency, transformation, global investment
New Development corridors Equity and cultural identity Efficiency, transformation, global investment
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New residential areas Cultural identity Transformation, efficiency
High security areas Efficiency equity
The first structure is similar to building height structure generated by a polycentric development.
Observation also indicates that this structure is consistent with the existing development trend of
the city and with the regulation of the Structure plan of the Addis Ababa
The second structure however is a new regulation. It maintains the citys history; it increases the
quality of the city, and generates income from tourism. Many cities have old core areas that
maintain their history, etc. and Addis Ababa also needs to enhance its old areas. With this, we
now move to the next chapter which is the application of the design program to the context
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III APPLICATION OF THE DESIGN PROGRAM TO THE CONTEXT
What has been found from the literature and the context review was once again tested against a
variety of design concepts/options out of which the most feasible was taken and further
developed to fit the context.
The five models that were considered by this study and the rational for selecting one of them
are presented below
The mono-centric city structure: as we can see in the diagram, this is about a city with
one center which is the CBD. The tallest buildings rise from this center and building
height for the rest of the city will be down slopping from the center. A building height
regulation can be designed in such a way that it reflects the prevailing urban structure.
16
17
The poly-centric or multi-nucleated city structure: this is about a city having a
number of centers playing different roles. One can be the CBD while the other could be
centers of educational facilities, industrial establishments, commercial areas, sub-
centers and nodes serving a peripheral expansion area. A citys skyline can easily be
reconstructed on the basis of this hierarchical service structure.
18
19
The decentralized city structure: This applies for both mono-centric and poly-centric
cities. The essence of this type of city structure lies on the fact that in addition to existing
citys center/s, one also finds additional centers serving decentralized satellite
towns/new towns. A citys sky line can once again be designed in line with such
structure.
20
21
A democratic city structure: this reflects a flat skyline resulting from a planned or
spontaneous environment that has eventually created a city where no building
dominates over the others.
22
23
A laissez faire model: This is a model that is not controlled but left to the market. Once
again, experts argue that what is eventually produced could be similar a mono-centric or
poly-centric structure.
The most feasible options were considered to be the decentralized and the poly-centric urban
structure models. For the updating the existing building height regulation of Addis, the study
team has then adapted a hybrid of these two models. Such structure was also promoted by the
new structure plan of the city and by the contextual study.
The different components of this polycentric structure in hierarchical order are presented in the
context of Addis Ababa were:
The CBD: consisting of three different sections (the inner core, special areas such as
Piaza, Mercato and Arat Kilo area, and development corridors connecting the above
areas)
Tertiary centers: Bisrate Gebriel, Meri Luke, Gotera, Saris, Kotari, Betel, Winget, Tor
Hailoch
Node/junctions: Tafo, Ayat, Bole yeka, kara alo, ketebe TTC, gergi, bole Michel, 22
mazoria, shiro meda, semen gebeya, 18 mazoria, keraneo medihanealm, alem bank,
repi/kara kore, lafto, jemo, mekanisa, kera/gofa mazoria, akaki/tuludimtu, akaki old
center, and finally
Development corridors: these are divided into first, second and third grade corridor
according to their character. A detail list of such development corridors is attached at the
annex
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IV DESIGN STAGE: FROM CONCEPT TO DESIGN
Once the polycentric urban structure model was selected, the next step was to identify what
height corresponds to each of the bumps in the structure. This is about what height to assign to
the CBD, the sub-centers, the corridors, the nodes, the junctions, etc. For this, the study team
has considered the following scientific methods
5. A combination of them
The economic study team has tried three different formulas and eventually found the third which
is known as the breakeven approach as the most appropriate for the Addis Ababas context.
The technique helps to set the minimum economic building height level based on the
maximum number of stories set by physical/spatial criteria. The equation used for the analysis is
as follows.
BEP = FC/(SP-VC)
Where:
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Using the above breakeven analysis formula, minimum building heights were set for the
identified 31 different spots in the City. The analysis was done for four different plot areas
(500m2, 1000m2, 1500m2 & 2000m2) for each of the spots. In addition, three average rental
income values per square meter (100, 125 & 150) were used in the analysis based on the
location of the spots. The conducted analysis assumed Birr 3000/m2 lease price, Birr 5000/m2
construction cost and 75% BAR (built-up-area ratio) for each of the considered plots.
The outcome of this analysis for the selected sites was used as a reference for the minimum
economically feasible developable area which was later converted by the design team into the
minimum building height.
After examining different road efficiency related formulas and applying the selected one on 1m
distance along the East- West axis (from Urael to Megenagna), the study team has found the
1:4 FAR (Floor Area Ratio) as the highest permissible development density in the next 10 years.
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The other esthetic height theory that was that of the recent Van Der Series With Plastic Number
& Plastic Number Series, which is a modern proportioning system(1983) using Series: 1, 1 ,1,
2, 2, 3, 4, 5, 7, 9, 12, 16, 21,28,37,49,65 which is Pi= Pi-2 + Pi-3 ; for i>2, given P0,P1 & P2
as a means of proportion, is also an invaluable tool for frontage and height determination. In
any sequence of four terms, the fourth is the sum of the first two.
Though both theories are applicable, the team has chosen the Golden numbers for their wide
international application and the variety of options they give between two consecutive numbers
particularly in the lower range.
The other two esthetical considerations that were considered in our design are:
Enclosure: is the relationship between the horizontal distance between two buildings and
the vertical height. The most commonly used enclosure relations in many cities are 45
degree (the height of the building being 1 x the width of the street), 27 degree (.51 x the
width of the street), 18 degree (0.32 x the width of the street) and 15 degree (0.26 x the
width of the street). In exceptional cases, such relation could extend to 60 degree which is
1.73 x the width of the street). Applying such proportions to a 40m wide street, the
respective height of a building on this street for each of the four formulas will be 40m (13
story), 20.4m (7 stories), 12.8m (4 stories) and 10.6m (three stories). For the 60 degree,
the height of the respective building will be 69.2m (23 stories). Diagram #3: building height
according to enclosure principle
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Scale: according to Carmona et al (2003: pp 156) scale is the perception of an object
relative to other objects around it, and to our perception of those objects. Scale concerns
first, the buildings dimension and all its parts relative to the dimensions of a human being
(i.e. human scale) and, second is its dimensions relative to those of its setting (i.e. generic
scale). Hence, a building can be understood to be of a human scale or not and, separately,
to be in or out of scale with its surroundings. The human scale is the distance that one can
see the facial expression and feelings of a person. This distance is approximately 15m or
27degree con of vision.
The other type of scale which is also very important in the study of a citys building height is
the so called intimate scale. The intimate scale expresses the relation between street
width, building frontage and building height. If a street has a width of 40m, the width
according to this intimate scale has to be 20m and the height 16.6m. In other words, a
relation of 1:0.5:0.45 between street width, building frontage and building height is found to
be an intimate scale. The use of the intimate scale is in most cases recommended to that
part of the building that comes closer to the street. If a tall building comes to the street, it
becomes offending, but if it has a podium and a tower combination and the podium which is
designed according to the intimate scale principle comes closer to the street, the whole
complex becomes appealing. Another alternative to produce the same effect is the use of
an open space in front of the tower (see both options in the table below)
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Intimate scale buildigs: podium-tower Intimate scale buildings: set-back-tower combination
combination
This building height regulation has the minimum and the maximum building height regulation for
an area. The way the study team determined such limits is based on two design principles. The
first is the Golden ration itself and the other is the combination of the economic and
infrastructure developable floor area. On the basis of this:
When infra FA (max) = economic FA, we took the golden section principle which gives
both maximum and minimum. Yet, we have made sure that such regulation never
exceeds the maximum carrying capacity of the infrastructure.
When the infra FA (max) is greater than economic far min, our decision was to propose a
minimum that goes with the economic minimum and a maximum height that respects the
infrastructure maximum.
When the economic regulation was greater than infrastructure max, we recommend
improving infrastructure. On the assumption that such improvement will be made, we
made our regulation on the basis of the golden section rule.
This building height was once again subject to other two strong instruments, which are
1. A citys vision which is developed by the study team in light of the grand vision of the
new structure plan (see 2.3) and
Combining the four design principles, the new vision of the city, constraints, existing and future
trends, the design team has come up with what is believed to be a responsive and
accommodative building height regulation for Addis Ababa. The regulation for the different
sections of the city is presented below
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IV BUILDING HEIGHT REGULATIONS FOR DIFERENT PARTS OF
ADDIS ABABA
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5.1 Building height Regulation for different locations
On the basis of the selected poly-centric urban structure, the new building height for the city of Addis encompasses centers, sub
centers and minor centers, nodes, development corridors, the old city part, historical areas, areas along the ring road, etc.
The central business district is the area where the international vision of Addis is going to be reflected. The maximum building height
in this area, which also applies for the whole city, is 52 stories. This figure is determined on the basis of the grand vision of Addis as
the African capital. Such figure, representing the total number of African countries so far, is already adapted by the new commercial
bank headquarter (design stage) in the citys core area, has a very strong symbolic meaning.
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5.1.2 Sub Centers
Table #2: building height regulation for the sub centers
According to New BH
No Area New BAR (%) New max FAR Remark
the old BHR (Stories)
1 Megenagna G+7-20 13-21 80 max 1:5-1:7 The major constraint within the Megenagna
sub-center is the view towards the Yeka
2 Ayer Tena G+2-LDP 8-13 80 max 1:4 Mountain. To protect this beautiful land scale,
the design has limited the maximum building
3 Kaliti 8-13 80 max 1:4
height in this area to only 3 stories.
4 Lebu 5-8 80 max 1:4 BAR is new to go to a maximum of 80% with
the minimum range left open.
The boundary that is taken to define sub-center
areas is in most cases taken from the LDPs
prepared by the city government
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5.1.3 Tertiary Centers
Table #3: building height regulation for the tertiary centers
Tertiary centers
4 Saris ----- 8-13 80 max 1:5 The major constraint that is considered
in some tertiary centers is the aviation
5 Kotari G+2-LDP 8-13 80 max 1:5 zone regulations
6 Betel ----- 8-13 80 max 1:5
The 1:5 FAR considered for some
7 Winget G+2-LDP 8-13 80 max 1:4 tertiary centers is due to the low traffic
density in such areas.
8 Edna Mole G+4-12 5-10 80 max 1:4
BAR is a maximum of 80%
9 Tor Hailoch G=4-LDP 8-13 80 max 1:4
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5.1.4 Nodes
Table #4: building height regulation for the nodes
Nodes
According
New BH New BAR New max
No Area/location to the old Remark
(Stories) (%) FAR
BHR
1 Tafo 3-5 80 max 1:4 The boundary that is taken to define
tertiary centers is in most cases taken
2 Ayat 5-8 80 max 1:4
from the LDPs prepared by the city
3 Bole Yeka G+2-LDP 5-8 80 max 1:4 government
4 Kara Alo 5-8 80 max 1:4 The major constraint that is considered
in some nodes includes aviation zone
5 Kotebe TTC G+4-12 8-13 80 max 1:4 regulation, view corridors and security
6 Gergi G+2-7 5-8 80 max 1:4 issues
7 Bole Michael G+4-12 5-8 80 max 1:4 BAR can be lower than what is indicated
as minimum in this table
8 22 Mazoria G+4-12 8-13 80 max 1:4
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17 Mekanissa G+4-12 8-13 80 max 1:4
36
5.1.5 Development Corridors
37
Post office-Defense Ministry G+7-LDP 21-34 80 max 1:5-1:7
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2nd grade development corridors
Table #6: building height regulation for2nd grade development corridors
According
New BH New BAR New max
No Development corridors to the old Remark
(Stories) (%) FAR
BHR
2nd grade development corridors
1 Urael-Lem Hotel These are the main
streets that radiate
Urael Zerihun bdg G+7-20 13-21 80 max 1:5-1:7
from the main city
Zerihun Bdg-Lem Hotel G+4-12 8-13 80 max 1:4 center connecting the
CBD with the sub-
2 Gotera Kaliti centers and the rest of
the city.
Gotera- Saris G+4-12 8-13 80 max 1:4
Building height on
Saris kaliti 5-8 80 max 1:4 these streets refers to
development on both
Saris- Tulu Dimtu 3-5 80 max 1:4 sides of these streets
3 Mexico kera taking the front plot
into consideration
Mexico-Bulgaria mazoria G+7-LDP 13-21 80 max 1:5-1:7
4 Cherkos-Gofa Mazoria
39
8 Autobus Tera-Paster-Medhanealm
Paster-Medhanealm G+4-12
8-13 80 max 1:4
13 Arat Kilo-Megenagna
17 Urael-Tele Bras
Urael Tele Medhanealm 8-13 80 max 1:4
Tele Medhanealm Bras Hospital (5-10 aviation
regulation)
18 Olympia-Meskel Flower
Olompia Hadid 8-13 80 max 1:4
41
3rd grade development corridors
Table #7: building height regulation for 3rd grade development corridors
According
New BH New BAR New max
No Development corridors to the old Remark
(Stories) (%) FAR
BHR
3rd grade
Gurd Shoal-CMC G+4-12 (8-13) 80 max 1:4 These are streets that
connect the center
CMC Ayat G+4-12 (5-8) 80 max 1:4 and sub-centers to
tertiary centers, nodes
2 Megenagna-Kotebe TTC-Karalo G+4-12 1- 3
and other areas of the
3 Lamberet-Karalo 3-5 80 max 1:4
city
4 Adwa Bridge-Zerihun Building- Atlas- Worbek G+4-12 5-8 80 max 1:4 Building height on
building G+4-LDP these streets refers to
5 Yohannes Church-Gojam Berenda 3-5 80 max 1:4 development on both
sides of these streets
6 Wollo Sefer-Gotera (roads radiating from G+4-12 8-13 80 max 1:4 taking the front plot
nodes)
into consideration
7 Kaliti-Akaki 3-5 80 max 1:4
42
13 Ayer Tena-Alem Bank 5-8 80 max 1:4
19 Anbesa Garage-Goro
43
5.1.6 The Old City Core
The old core is one of the heritage elements of any city. The medina of the Islamic city or the traditional medieval inner core of many
western cities is reserved in view of keeping this historical heritage.
The core area is always the point of attraction as one can see the different layers of a citys history in this area. The preservation of
such core, due to its prime location, is one of the most challenging tasks for city governments. Yet, those who have managed to
protect it (such as Rome, Athens, and Venice, to mention a few) are reaping huge benefits from tourism and related activities.
The study team for the revision of the building height of Addis Ababa has also the embarked in such exercise of identifying the
historical core of one of the few indigenous cities in Africa: Addis. This city, as a capital of Africa and a major tourist destination in the
future needs to tell its history of how it has become what it is today. With this conviction, the team has decided to keep the height of
buildings in this area to a maximum of five stories. However, where the old pattern is broken to bring modernity mainly through the
construction of wide roads, slightly taller buildings are allowed to exist.
The vision developed for the historic core being identity and culture, allowing tall buildings to come to this area will only disrupt the
old morphology (plot size, plot type, street pattern, building scale, density, etc) thereby seriously affecting the historical significance of
the place.
What distinguishes this old core from the Rest of the city in terms of building height? The regulation for both areas is 1-5 stories. Yet,
the intensity of development is different. There is a high development pressure in the old core area for more building height as
compared to the rest of the city where such pressure is low. This pressure is to be relieved by allowing more dense development in
the old core reaching a FAR of 1:4 while that of the rest of the city remains at1:3. BAR is also different with higher percentage (up to
80%) given to the old core while the respective rate for the rest of the city is 70%. With this, the need for vertical development in the
old core can be compensated with horizontal development.
44
Table #8: building height regulation for the old city core area
The old city core area
1 Residential areas 1-5 80 max 1:`4 Those that are within the 1km radius for the
old palace, around Piaza and Arat Kilo area
are already determined on the basis of a
datum
Residential areas within this zone to have a
maximum of walk up building
2 Non residential areas 1-5 80 max 1:4 These are all other land uses except
residential
3 Along major streets
(streets width of 25m
and above) 5-8 80 max 1:4
Mixed use
45
5.1.7 The Buffer zone around the Old Minilik Palace
Table #9: building height regulation for the buffer zone around the old Minilik palace
Buffer zone around the old Minilik Palace (1km radius)
Protected mixed 1-5 & 80 max 1:4 max This area is a high security zone which needs protection
development area from the surrounding development within a radius of
Datum 1km. The height of buildings is determined, on the basis
of a datum taking the floor level of the old palace building
which stands at 2438m a.s.l. On the basis of this
calculation, the maximum allowed in the area will be five
stories which is similar to that of the old city core.
46
5.1.8 Development in the Transition Zone
The transition zone, as we can see in the diagram below, is the interface between the Rest of the city and a CBD, a sub center, a
tertiary center, a node or a development corridor. It is part of the rest of the city but due to its immediate location to a high rise zone
deserves a special treatment. If one looks at Megenagna sub-center for example, the regulation for the sub-center area is between
13-21 stories. What is called transition zone in this case is the immediate zone/block bordering/adjacent to the edge where the 13
story regulation applies. Theoretically, this transition zone should have been 8-13 yet due to low level of infrastructure development in
such areas, it is difficult to impose such restrictions. What the study team proposes is as follows
For mixed development: as such areas are the interface between an active development area and the rest of the city, their
regulation will also be a combination of these two calculated on the bases of the maximum theoretical and a maximum for the rest of
the city. In the case of the above example, the new height will be 5-13. This we believe gives a big room for the transformation of
these areas.
47
Table #10: building height regulation for the transition zone
Building height in the transition zone/the interface
Non As 80 max 1:4 As mentioned above, building height regulation in such areas
residential indicated varies according to the building use. On the basis of this, what the
in the study team proposes is the following.
remark
For plots immediate to 5-8 BHR zone, such areas will be
1-5 for both residential and mixed development
48
5.1.9 Development in the Rest of the City
The rest of the city is the area that is not given special building height treatment. It consists of residential land use, non residential
land use and predominantly mixed use along streets. The building height regulation for this area is presented in the table below
Table #11: building height regulation for the rest of the city
Building height in the rest of the city
Residential areas 1-5 70 max 1:3 All residential area can develop from a normal
ground floor to a maximum of walk up apartment
of five stories. As it is residential, low density
development is also new.
Non residential land uses 1-5 70 max 1:4 What distinguishes non residential development
from the residential area is the intensity of
development. Here the maximum FAR is
increased slightly
49
On 20m RoW 0-5 70 max 1:4
The side lane of this ring road is also very narrow in some areas (Imperial Hotel for example) that if a taxi is parked wrongly, the
whole street is blocked. The fact that developable land along the ring road is accessed only from one direction and such development
is exposed to noise and smoke from vehicular traffic passing by particularly during peak hours, are also some of the limitations of the
ring road to use it as an intensive development corridor.
For such limitations, we have new a low intensity development along the ring road. However, for the nodal/junction points along the
ring road, a different regulation is presented.
Selected nodes along the ring road See the regulation on development nodes
Other nodes
50
Cadisco Metatefia (under
aviation
regulation)
0-5
Abo Interchange 5-8 80 max 1:4
51
5.2 From building height to plot size determination
The economic and infrastructure study groups produced the minimum and maximum FA
(not building height) for each location. Combining the economic minimum and the
infrastructure maximum with aesthetic principles, the design team has determined the
minimum and maximum new building height for the city. Yet, there is one missing
component which is an important instrument to implement the building height of the city
as new in this study: the development of plot sizes for each building type. This is what is
presented next.
A combination of these two variables will give the minimum width of a plot.
Depending on the size of the plots, other options (smaller or bigger) could also be used
Note: A refined extract from this table is used to develop building frontage and depth in
the last section (implementation guidelines)
5.2.1.2 Setbacks
Front Setback Vs Enclosure
52
Enclosure is defined as the relation between the horizontal distance between two
buildings and the vertical height. In other words, the enclosure principle requires
relating the height of buildings on both sides of a street or standing side by side with
the horizontal distance between the buildings. According to literature (and as explained
in previous chapters), such relation is determined on the basis of a 1:1.73 (60 0), 1:1
(450) 1:1.5, 1:2 and 1:4 all depending on which part of the city we are focusing. While
the 600 (1:1.73 which is for every 1m horizontal distance a height of 1.73m relation) is
mainly used in the CBD where achieving the maximum height and development
density is the objective, the lower ratios such as 1:2 and 1:4 are used when one goes
to the suburb where development pressure is low. These ratios which are used to
define the position of enclosing buildings are also used to determine the left side, right
side, and rear side setbacks as will be explained later. However, as we will see it in
the same table, due to the specific nature of plots in the city of Addis which are
mainly small and irregular, these ratios are modified to fit the context.
The left, right and rear side setbacks are also determined on the basis of an enclosure
principle. The formula on how to determine these setbacks is indicated in the following
table
2 Rear side setback Distance from building to building in the rear side
= Height of the building /2 (which is tan 63.5
degree). For our context, this is again modified
(see implementation guide line)
3 Left and Right side setback To determine left and right side setbacks, an
enclosure principle of 4:1 (where 4 is the height of
the building and 1 is the horizontal distance from
53
another building in the left or right side) is new.
However, for buildings without lateral openings,
such side setbacks are not needed. Once again,
this is also modified for the citys context.
Determination of plot size
Based on the above building footprint and setback criteria, the size of a plot will be
determined as follows
Plot frontage= a+b+c (see the above drawing) where b is building frontage,
c is right side setback anda is left side setback. Where the building has no
lateral opening, these two setbacks may be reduced or eliminated
Plot depth= D+E+F where D is front setback from the street, E is building
depth and F is rear side setback
The total plot size obtained through this formula has to be compared with the
one that is calculated on the basis of the Maximum FAR. The maximum FAR
can be implemented only if the plot size is at least 25% of the total floor area.
54
VI GUIDELINE FOR IMPLEMENTING THE REVISED
BUILDILNG HEIGHT REGULATION OF ADDIS ABABA-2011
1. Story/floor height: one story/one floor means the height of a building from one floor
level to the next floor level. In this study, this height is taken to be 3.0-3.5m.
Building height: as indicated with the
arrow in both figures (A), the total
height of a building in our study is the
height of the building from ground
floor finish level to the upper most top (A
tie beam of the building. Roofs,
parapets and mechanical rooms are )
not counted as part of the height of
the building. In other words, a five
story building in this study means a
building with a maximum height of
15m-17.5m excluding roof height,
parapet or the height of mechanical
rooms. However, if the slope of the roof is so steep that the maximum height created
at any point exceeds 2.40m, it is considered as additional room (as written in the
building permit directive).
Building height on steep sites: for buildings
located on steep sites, the total number of
stories for such buildings is to be taken from
the ground floor level facing a main street.
However, if the building runs along the steep
slope (as in the figure) the total height of the (A
building will be taken from the highest point )
where the building touches the street (B). This
is to allow for more development to take place
in such areas. (B
Buildings with Mezzanine: In case of ) mezzanine floor (at any level),
floor to floor level can vary but the maximum height of the buildings should fall within
the given range
55
BAR: known as the Built up Area Ratio, BAR expresses the relation between the
area occupied by the building and the total plot. 80% BAR means, the building is
occupying that percent of the total plot area.
Unlike the previous study, what is indicated here is the maximum Built Area Ratio
(BAR) which in most cases is 80%. Leaving the minimum BAR open to the individual
builder will not only enable to build higher and higher but also contribute to the
increase of open space in a compound. Such open spaces are to be used as green
areas and the remaining for circulation of people, vehicles air and other purposes.
Limiting the maximum BAR on the other hand will guarantee a minimum of open
space thereby avoiding the kind of living environment where every plot of land is fully
occupied by buildings. This is particularly the case where land price is the maximum
such as commercial areas and in the city center.
FAR: this is the relation between the total floor area expressed in square meter and
the total plot area. A 1:4 FAR means that the total floor area of the building is four
times the area of the plot.
One of the findings of this study is the identification of FAR as the most important
factor in building height regulation. It is the intensity of development in an area and
not the relation between open and built up space that determines the quality of such
places. Traffic congestion and associated issues such as pollution are also a result of
such intensity. However, what is directly related to the number of people attracted to
a specific building or an area is directly related to the working space provided in that
building or buildings in the area. Taking this into consideration, spaces allocated for
circulation (stairs, lifts, corridors), toilets, stores, janitor rooms, walls, basement
parking, and other rooms that are considered to be not related to the service
rendered should be excluded from the calculation of FAR.
This exclusion must be done by calculating actual area of these spaces. However, in
the event that this is not possible, the following table can be used.
Table #15: building types and areas to be deducted during FAR calculation
56
To summarize,
The maximum BAR for any area in the city is 80% with the exception of
Mercato which has 85% BAR) and the minimum is left open
The maximum FAR for the city center and some sub-centers is 1:7 which
is seven times the size of the plot while the most common is 1:4
2 Updated building height for the CBD, Sub-Centers, Tertiary Centers
and Nodes
Since the implementation of the new building height regulation, contradiction has
been observed between enclosure and building height regulations in many areas
especially in those for which the building height is set at 13-21, 21-34 and 34-55
stories. For example for a 30 m wide street, a 1: 1.73 enclosure and 21-34 stories
while the enclosure principle permits a 51.9m (i.e. 30x1.73) tall building the building
height regulation prohibits it since even the minimum number of stories (21) cannot
fit in the 51.9m height. The same contradiction can also be observed in areas where
existing street are very narrow (10m, 12m, 15m, 20m, etc) but there is high
development pressure in areas such as the largely residential areas of the CBD,
nodes, sub-centers and tertiary centers.
57
Table #16: new Enclosure, Minimum Building Height and FAR for centers, sub centers, tertiary centers and nodes
The CBD (excluding piazza and Sub Centers Tertiary centers Nodes
Mercato)
The Height Enclosure FAR Sub- Height Enclosure FAR Tertiary Height Enclosu FAR Nodes Height Encl FAR
CBD (max) Cente (max) center re (max) osur (max)
rs e
Inner 34-55 E= 1:1.73 1:5-1:7 Megen 13-21 E= 1:1.73 1:5-1:7 Bisrate MinBH For For All MinBH 1:4 for
zone Or agna or Gebriel, to Bisrate Bisrate nodes to E= all
E-55 E-21 Meri Luke, MaxBH Gebriel Gebriel identifi MaxBH 1:1 nodes
Gotera, as and and ed in as as
Saris, indicate Gotera Gotera it the indicate indicat
Interme 21-34 or E= 1:1.73 1:5-1:7 Ayer 8-13 E= 1:1 1:4
Kotari, in the E= is final in the ed in
diate E-34 Tena or
Betel, final 1:1.73 1:5-1:7 report final the
zone E-13
Winget, report For the report final
Outer 13-21 or E= 1:1.73 1:5-1:7 Kaliti 8-13 E= 1:1 1:4
Edna or rest For the or report
zone E-21 or
Mole, Tor E to E=1:1 rest as E to
E-13
Hailoch MaxBH indicated MaxBH
Lebu 5-8 E= 1:1 1:4
in the
Or
final
E-8
report
(1:4 for
some
centers
and 1:5
for
others)
Note: within the CBD Note: within the Sub-Center, Tertiary center and Node
For streets above 30m width, maximum For streets of 15m width and above, maximum FAR has to be 1:4
FAR is 1:5-1:7
For streets of below 15m width FAR maximum has to be 1:3
For streets of 25m, 20m, and 15m,
maximum FAR has to be 1:4
Note:
Enclosure of 45 degree or 1:1 ratio indicates the relation between the width of the street or that of a permanent open space in front (like Meskel Square) and the height of a
building. This principle has been applied for all areas where the maximum height new by the study is less than 14 stories.
In areas where high rise buildings (13-52 stories) are new, the enclosure principle or the relation between the width of a street or a permanent open space in relation to the
height of a building is 60o or 1:1.73 and FAR is 1:5-1:7
58
Table #17: new Enclosure, Minimum Building Height and FAR for corridors, historical areas, transition zones, ring road and the rest of the city
Development corridors Old city core Transition zone Rest of the city Ring road
Areas Height Enclosu Areas Height Enclosu Areas Height Enclo Areas Height Enclo Areas Height Enclosu
under re under re under sure under sure under re
consider consi consider considera considera
ation ation tion
derati tion
on
Note:
New FAR
Development corridors: For residential areas in Piazza maximum FAR is 1:3 and the rest of the corridors FAR maximum is 1:4.
Old city core: For the old city area FAR maximum is 1:4. Yet, when the width of the street is below 15m, FAR maximum is 1:3
Transition zone: For the transition zone FAR maximum is upgraded to 1:4. However, when the width of the street is below 15m, FAR maximum is 1:3
The rest of the city: For the rest of the city FAR maximum is 1:3 for residential land uses and 1:4 for non residential land uses. But, when the width of the street is below
15m, FAR maximum even for non-residential land use areas has to be 1:3
The Ring Road: For the ring road, FAR maximum remains at 1:4 for nodes. FAR maximum is 1:3 when the width of the street is below 15m. Maximum FAR is upgraded for
the rest of the ring road to 1:3.
Enclosure of 45 degree or 1:1 ratio indicates the relation between the width of the street or a permanent open space in front (like Meskel Square) and the height of a building. This
principle has been applied for all areas where the maximum height new by the study is less than 14 stories.
In areas where high rise buildings (13-52 stories) are new, the enclosure principle is 60o or 1:1.73 and FAR is 1:5-1:7
59
Application of this Amendment
1. When Enclosure height (E) is< the Minimum Building Height, Enclosure height (E)
becomes Minimum Building Height.
2. When Enclosure height is > Minimum Building Height; the building height regulation
applies.
Example: for a developer whose plot is facing a 10 meter wide street in the outer zone of the
CBD (where Building Height Regulation is 13-21 and the Enclosure ratio is 1:1.73), the building
height allowed by Enclosure will be 17.3m (5 stories with a room height of 3.5m). This is a case
where E height (5 stories) is less than the Minimum Building Height which is 13 stories
(scenario #1). In this case, the Minimum Building Height will be E height. More height (only up
to the maximum building height) can be permitted if Setback requirements can be met.
On the other hand, for a developer whose plot is facing a 40m wide street in the same area, the
building height allowed by Enclosure will be 69.2m (about 20 stories). This is a case where E
height (20 stories) is greater than the Minimum Building Height, 13 stories (scenario #2). In this
case the Building Height Regulation applies.
3 Determination of setbacks
3.1 Updated Setback regulation for the Rest of the City and 13-21 building
height zones
Previous discussions have indicated that due to the small size of most of the plots in
the city, the enclosure given as 1.5:1 (horizontal distance in relation to building height)
for the rest of the city has been facing implementation difficulties. Therefore, the
enclosure ratio for these areas is upgraded to 1:1.
For the same reason, the 1:1 enclosure recommended for building height zones of 13-
21 is also be upgraded to 1: 1.73 and become similar to that of heights above 21
floors.
While it was explicitly expressed in the regulation that the front setback is based on the
Enclosure principle, implementation of the Setback Regulation is observed to be inconsistent
with this principle.
The enclosure principle requires relating the height of buildings on both sides of a street with
the horizontal distance between the buildings. According to the regulation the enclosure and
setback regulation must be implemented by making field visits, measuring the space (not only
the street) and the height of the building in front of and opposite to the building for which
building permit is requested. For example, if the building is facing a permanent or long term
open space like the Meskel square, setback must be calculated based on the dimension of
that space. On the other hand, if the building is facing a shorter building set back must be
60
calculated based on the height of the shorter building since there is no enclosure above that
height.
The regulation is however being implemented by focusing on street width rather than distance
between buildings across a street. It is also focused only on the height of a building for which
building permit is requested rather than also the height of the building opposite to it on the
other side of the street. These approaches may have been adopted by the implementing body
because of their simplicity since they do not require site visit for each building permit request.
However, they are problematic because they do not lead to achievement of objectives of the
building height regulation.
In addition, it has been reported that, although theoretically sound, implementation of the
enclosure ratios has proved to be problematic due to the fact that most of the plots in the city
are small both in terms of width and depth. For example, for a 10m wide street and enclosure
ratio of 1:1, the permissible building height on the boundary line will be 10m (the width of the
street). However, if the developer desires to add two more stories (say 7m high), the
regulation requires a setback of 7m which is difficult for small plots to meet.
Therefore, the following amendments have been made to the Front Setback Regulation in
order to make it more responsive:
1 Enclosure is separated from Setback. The ratios given as 1:1 and 1: 1.73 must be read
as enclosure ratios (right of way to building height) and used only to determine
enclosure height (the maximum height a building on the right of way can have)
2 Setback is horizontal distance a building is required to keep from the right of way. On
the basis of this, front setback for any building must be 2x Enclosure ratio given for
the area.
E.g. for an enclosure of 1:1, setback will be 1:2 (horizontal distance: building height in
meters) and for enclosure of 1:1.73, setback will be 1:3.46 (horizontal distance: building
height in meters). According to this regulation, the developer mentioned above would
need a setback of 3.5 m only to add two more floors.
3 For buildings facing large permanent or long-term open spaces, a Site Visit Method
described above must be used to calculate enclosure and setback if the building height
specified for the site cannot be achieved using the street width based approach
currently being used.
1 Rear side setback Distance from building to building in the rear side = =
Height of the building /2 (which is tan 63.5 degree)
Unless for structural, safety, maintenance and other
reasons, medium and low rise buildings (<12 stories)
that do not have openings on the rear side can be built
on the boundary
2 Left and Right side setback When buildings have lateral openings on the left or
right side, enclosure principle of 4:1 where 4 is the
height of the building and 1 is the horizontal distance
from another building in the left or right side will be
used. This is equivalent to the height of the building
divided by 4.
For buildings without lateral openings, unless for
structural and other safety reasons, medium and low
rise buildings (<12 stories) can be built on the
boundary
For more detail, see condition below
3 Set back distance for a The minimum setback distance for a building facing a
building adjacent to left or main road on the front side and a side street on the
right side street other, its distance from the boundary on such sides is
determined on the basis of the following formula
X= (HB/8)-SW/2 where
Conditions to be fulfilled
62
If the side street is a main street (with right of way
greater t 30m), the setback distance should be
determined on the basis of the new enclosure
principle (like in #1 in this table)
4 Set back distance for a The minimum rear side setback for a building facing a
building adjacent to rear side main road on the front side and a rear street on the
street back, its minimum distance from the boundary on
such direction is determined on the basis of the
following formula
X= (HB/4)-SW/2
Note:
4. In the case of left, right or rear side walls with top windows, a minimum of 1.5m
from boundary line must be maintained.
5. If, like in new investment areas, a person want to build in the absence of any
knowledge about what is to happen in his left, right or rear side, he/she can
proceed as long as he/she maintains his share of the side/rear setback which is
63
HB/8 for left and right side and HB/4 for rear side. HB is the height of the
building. However, if the building has blind wall on one of such sides, such
obligation does not apply Note if the neighborhood plot had no building ,or had a
building of less than the minimum new building height regulation rang , the set
back is governed by the new minimum building height regulation rang.
Based on the above setback criteria, the size of a plot will be determined as follows
Plot frontage= a+b+c (see the above drawing) where b is building frontage, c
is right side setback anda is left side setback. Where the building has no lateral
opening, these two setbacks may be reduced or eliminated
Plot depth= D+E+F where D is front setback from the street, E is building
depth and F is rear side setback
The total plot size obtained through this formula has to be compared with the one
that is calculated on the basis of the Maximum FAR. The maximum FAR can be
implemented only if the plot size is at least 25% of the total floor area.
4 Minimum Street Width, Building Frontage, Building Depth and Plot Size
determination
The regulation has specified minimum street width and plot and building frontage based mainly
on aesthetic principles. However, this regulation has faced problem of implementation in many
parts of the city that have already developed because the building height regulation is being
64
implemented without altering existing street and plot patterns. Therefore, under the
circumstances, the regulations are amended as follows:
1. The Minimum Building Frontage and Building Depth (see table below) must be applied
with a 20% tolerance. That is to say, for example, for a requirement of 20m minimum
frontage, frontages ranging from 16-20 will be acceptable. The same applies to
building depth
2. building depth
65
3 20 1:4 -1:5 1:4 1:4
4 15 1:4 1:4 1:4
5 10 1:3 1:3 1:3
6 ----- 1:3 1:3 1:3
Note: these minimum street widths do not apply to pocket sites accessed by independent
roads such roads are practically regarded as internal roads for the pocket sites.
3. Clarity: To make implementation easier, the building permit department or section has to
give clients with specific indication of the permitted building height in their respective
area both in stories and meters. This is like saying 5-8 stories or height ranging from 15
to 28 meters.
4. Application of this regulation on LDP areas: This building height regulation does not
apply in areas whose LDP is already prepared and approved. However, the regulation
applies to aspects that were not addressed by the LDPs such as FAR and others. LDP
preparation and revisions taking place in future must however be conducted in light of
this building height regulation.
66
5. Transparency: The formulas used to calculate building setbacks, plot sizes and other
relevant information that are needed in the design process should be clearly displayed or
made available for the public and professional associations
8. Pocket sites: Building on narrow plots which do not fulfill the suggested minimum
frontage can be accepted if such plots are pocket sites squeezed between existing multi-
story buildings that do not allow expansion. The new building with maximum height of
G+13 to be built on such sites has to be as close to existing buildings as possible (or
attached if possible having no lateral openings) to create a better urban image in the
area. In such cases, as long as the new developer assume all the risk and cost
associated with attaching the building, the adjacent building owners are obliged allow
the building to be constructed attached to their buildings. On the other hand if the plot
fulfills the minimum requirement, except building line/front side setback offset
requirements/ other component of the regulation will be applicable, the new building to
build on the plot must respect the previous building line.
9. Request for height increase: people who have requested to add one or more
additional stories (without exceeding the maximum new by the new building height
regulation) are allowed to do so as long as:
They have enough parking space for the new additions and
They satisfy the Setbacks, BAR and FAR requirements of the new regulation
10 Important Note: In addition to the building height regulation, developers and building
designers must be required to harmonize the height and design of their buildings with the
character of the areas in which the buildings are to be realized especially when the area is in
the main corridor of the city and have been substantially (more than 40-% of the block)
developed respecting the old building height regulation and/or the area have registered
heritages. Area specific details should be determined in the LDP or urban design level.
Urban planning and information institute is expected to do the details of such area as soon
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as possible. Even when there is no such detail, the suggestion is found to be very useful
since although harmonization with existing context is a very important urban development
goal there has been concern that it cannot be achieved by regulation of building height
alone. However, it was also realized that regulation of this aspect requires first determination
of character for the said areas either by the regulation or by plans. Owing to difficulties in
this regard, it is decided to limit control to advising designers and developers to harmonize
their developments with the context, on the part of the implementers, and submitting report
on their response to such advises on the part of designers and developers. In areas where
the details are not developed and enacted in regulation or plan, failure of developers and
designers to respond to these advices adequately, in the opinion of the regulators, shall not
be the sole reason for rejecting development regulations.
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Annex #1minimum plot size requirement for the lowest building height of range
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BIBLIOGRAPHY
1. Allan Konya( 1980): Design Primer for Hot Climates. The Architectural Press
Ltd.London
2. Arivind krishina,Nick baker,svSzokolay,simos yannas(ed.), (2001): Climate responsive
architecture. Tata McGraw-Hill, New Delhi
3. Carmona Matthew, Heath Tim, Oc Taner and Tiesdell Steven, (2003), Public places-
Urban spaces: the dimensions of urban design
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