Accessory Dwelling Units

The City allows properties with a single-family residence to have an accessory dwelling unit (ADU), provided it meets the regulations outlined in City Code division 17.38. Accessory dwelling units provide additional housing within existing neighborhoods. Homeowners who create accessory dwelling units may benefit from added income and an increased sense of security.

An ADU means an attached or a detached residential dwelling unit that provides complete independent living facilities for one or more persons. It includes permanent provisions for living, sleeping, eating, cooking and sanitation on the same parcel as a primary unit.

ADU Permits

Piedmont allows and many properties have second kitchens, pool houses with a full bathroom and kitchenette, guest cottages, in-law units and the like, all of which function as part of a single-family dwelling unit and would be defined as an Unintended Accessory Dwelling Unit unless the designated area had been issued an Accessory Dwelling Unit Permit.

An Accessory Dwelling Unit Permit allows an accessory dwelling unit to be used and occupied as a dwelling unit independent of the primary unit. In essence it is a use permit. An application for an Accessory Dwelling Unit Permit that meets all the development standards provided in City Code section 17.38.060 is processed ministerially, meaning it is reviewed by planning staff with no public notice or public hearing.

Other Permits Related to ADUs

A new structure or exterior modifications to an existing structure that houses the ADU are subject to a Design Review Permit, which will likely require some level of public notification. New structures and modifications to existing structures require a Building Permit.