Accessory Dwelling Units

Accessory Dwelling Units (ADU)

Accessory Dwelling Units (ADUs) are known by many names: granny flats, in-law units, backyard cottages, secondary units and more. No matter what you call them, ADUs are an innovative, affordable, effective option for adding much-needed housing.

An ADU must be on a permanent foundation, have independent exterior access, and provide complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation. A Junior ADU can share sanitation facilities with main residence.

ADU Permit applications may be required to conform to All-Electric Building Ordinance and include only all-electric appliances and fixtures.
Learn more about the All- Electric Building Ordinance (Link).

State Guidance for ADUs

Learn more about the State Law and Guidance for ADUs

SmallHouse_ADU_Tile
  1. Permit New ADU
  2. Permit Existing ADU

Planning Approvals

Building Permit Requirements

If you are thinking about making any improvements to your home or parcel, and you have a septic system, you need to have your plans reviewed by Environmental Health.
Learn more about Septic System permitting.