Law changes in California over the past several years have made it easier to add an accessory dwelling unit (also known as an ADU, granny flat, casita, guest house, accessory unit, additional dwelling unit, accessible dwelling unit, mother-in-law suite) to most residential properties. Parking requirements have been reduced or eliminated, plus many impact fees have been waived on ADU projects. Setbacks have also been reduced to just 4’ on side and rear yards, meaning smaller lots may now accommodate an ADU. The ADU laws include single family residential properties, as well as multifamily properties.