Redwood City CA ADU Guidelines

Accessory Dwelling Unit (ADU) City 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.

For more ADU Information:


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