Accessory Dwelling Units (ADUs)
Accessory Dwelling Units (ADUs), also commonly known as in-law units, granny flats, or secondary units, can play an important role in adding cost-effective affordable rental housing, as well as providing a source of income for homeowners. Consistent with recent State laws, the City of Sonoma has updated its regulations to facilitate construction of new ADUs, including modifications to requirements for parking, fire sprinkler systems, and water and sewer connection fees. Short term rental (less than 30 days) of ADUs is prohibited.
A summary of the City of Sonoma’s regulations for the different types of ADUs is available for download. Details can be found in Sonoma Municipal Code section 19.50.090, Accessory Dwelling Units.
As one of the actions taken in response to the 2017 fires in our area, the City Council approved an Accessory Dwelling Unit Fee Waiver Program to further encourage the construction of secondary housing units by single family homeowners. Fee waivers are provided in the form of reimbursement and are limited to one per residence and capped at $5,000. The program will terminate on June 30, 2019, unless extended by the City Council.
For more information about building an ADU, contact the Planning Department.