- There are many great reasons to opt for a double, rather than single, storey home. As well as providing better compartmentalization of living spaces, double-storey houses also offer economies of scale as you get more house for less land. Here are some of the benefits of opting for a home with stairs, rather than without. The benefits of the double-storey are double the house for half the land and separate private and public spaces. You can choose any category of our double storey designs.