Accessory dwelling units are known by many names: in-law suites, guest houses, backyard cottages, or basement or garage conversions, among others. What all ADUs have in common is that they’re a separate living space typically added to a single-family residential lot, and they’re having a moment.

Constructing an ADU could increase your property value while providing rental income or extra living space for a family member. Then again, adding an ADU could be an expensive hassle you live to regret.

In my latest for the Associated Press, learn what to consider before you commit if you’re thinking about an ADU.