Some housing economists believe that “granny flats” could be the key to alleviating housing shortages across the country, and they are calling on more municipalities to ease up the rules to allow such dwellings to be built on or into more single-family homes. Nicknamed “granny flats,” these accessory dwelling units tend to be separate, cottage-like structures, but may be a converted garage or basement that houses an extra living area.
In California, three new zoning laws in 2017 allowed for expanded development of granny flats. California has since seen a 63 percent increase in the number of building permits for these units—more than any other state, according to ATTOM Data Solutions, a real estate data firm. But many counties either still have zoning restrictions that don’t allow these units, or they are making the building permit process difficult.
Source: “Could ‘Granny Flats’ Be the Solution to America’s Affordable-Housing Crisis?” MarketWatch (March 26, 2018)