Menlo Park, CA

Accessory Dwelling Unit (ADU) Regulations


Zoning:

Attached/Detached: RE/RES/R-1 (incl. S & U)

Lot Size:

Attached/Detached: 6,000 sq.ft.

Maximum ADU Floor Area:

Attached: not to exceed 50% of existing living area, w/ max. increase of 640 sq.ft. (700 sq.ft. if building complies disabled access requirements)

Detached: 640 sq.ft. (700 sq.ft if building complies disabled access requirements)

Number of Bedrooms:

Maximum one bedroom.

Storage/Closet:

No min/max.

Kitchen/Bath:

Require separate bathroom and kitchen facilities (permanent range, counters, refrigerator, sink). Maximum of 1 bathroom.

Parking:

One (covered or uncovered); tandem ok; permitted within required interior side yard and within front yard if no more than 500 sq.ft. of front yard is paved for motor vehicles and a min. side setback of 18” maintained.

(No additional off-street parking required if existing accessory building converted into a secondary dwelling unit; other exceptions to parking requirement may also apply.)  

Setbacks:

Attached: must comply with min. zoning requirements.

Detached: must comply with min. yard requirements for zoning district, except min. rear yard requirement is 10' and interior side and rear yards may be reduced to 5', with written approval of the owner(s) of contiguous property abutting the portion of encroaching structure. If contiguous interior side or rear property line is an alley, the min. setback is 5'. If the unit is constructed above an existing detached garage, side and rear yard setback is 5'.

Height:

Attached: must comply with requirements of underlying zoning district
Detached: 17'

Location:

A minimum of 10' must exist between structures.

Rear Yard Coverage:

May not exceed permitted building coverage established by zoning district in which lot is located.

Materials/Design:

Colors, materials, textures, and architecture similar to main dwelling; must comply with all applicable development regulations for zoning district and building code requirements.

Entryways:

N/A

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