What I didn't enjoy about The Owners is how big of a letdown it is after the film embraces its latter half twists. The first half is heist+home invasion clichés galore - a bunch of thugs looking to make some quick money by robbing a rich house fail to realize that the resident couple has some secrets of their own to hide. This plotline has now nearly run its course and needs truckloads of inventiveness to be taken seriously. While there have been a few surprises in this subgenre such as Don't Breathe and Villains, I don't think this film makes it to that list.
The screenplay meanders, the characters are all unlikeable (the film uses the pregnancy ploy to make audiences care for Mary, the character played by Maisie Williams, but it doesn't work), and the overall slackening of pace do the film no favours. There are zero scares and it's some bloodshed alone that tags it under the horror category. Watch one of the films mentioned above (or M.N Shyamalan's The Visit) instead.