Sometimes, the best project for your home isn’t something for your use only. Building a space that someone else can live in is one of the hottest trends in home improvements. Increasing the living space and possibly adding a separate unit for rental income improves your use of the property and can give you a tidy return on your investment as well. The trick is that you have to make sure you do it correctly. If you’re debating adding an ADU to your property, here are a few things you should know before you start.