Accessory Dwelling Unit (ADU) Regulations



Lot size:

No min/max but must follow zoning guidelines on lot coverage, lot must have existing or proposed single-family dwelling.

Maximum ADU Floor Area:

700 sq.ft., 800 sq.ft. for ADUs that meet 11A Standards on accessibility

900 sq.ft. for ADUs on RH or R-1 lots larger than 9,999 sq.ft.

No. of Bedrooms:

No min/max


No min/max


Require separate bathroom and kitchen facilities (must be a stove/oven, 220 amp circuits, sink and food preserving appliance.  Wet bars with countertop ovens are not acceptable.


No additional parking required.


Attached:  must meet height standards for underlying zoning district.

Detached: must be 10' from rear property line, at least 6' from any other structure and meet minimum side yard setback for zoning district.


Attached:  must meet height standards for underlying zoning district.

Detached: 14'


May be attached to house or detached in rear yard.

Rear Yard Coverage:

50% max.


Must be architecturally compatible with style, exterior paint and materials of single-family dwelling on same lot.


Garage or patio doors may not be used as main entrance, unit must be accessed by a side-hinged swinging door.

But before all of this, we can help you finance the whole project too! Hauser Construction is the premier contractor for the PACE financial program throughout the Northern California Area. Hauser Construction is pleased to be the premier contractor for the Pace program in the Northern California Area. Whether your project is Large or Small, we can finding you financing that will get your project started. The best part of the PACE program is that it is not tied to your personal credit. It is attached as a line item to your property taxes. which means that you you will not start paying until November of the following year. The California Pace program is a financial tool designed to help homeowners fund Energy efficient projects around their homes or in a commercial building. Call us today to schedule a consultation. It never hurts to ask.. right? Financial companies we work with: