Barn dominiums are basically less expensive and also less insurance and maintenance. This kind of house can make you pay the taxes cheaper than conventional houses. It is also faster to build and easy to move in than the conventional ones. So it is a good choice to get a more efficient and cheap house. There are many designs of barndominiums that you can choose, and one of them is L shaped barnominiums. The L shape will make the house get more rooms and will also feel bigger than the regular square or rectangular barndominiums. Ideas & Inspirations.