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Mountain View CA ADU Guidelines

Accessory Dwelling Unit (ADU) City Regulations

Zoning:

R1

Lot Size:

No minimum.

Maximum ADU Floor Area:

700 sq. ft.

Number of Bedrooms:

No minimum/maximum.

Storage/Closet:

No minimum/maximum.

Kitchen/Bath:

Requires separate kitchen facilities (permanent range, counters, refrigerator, sink) and bathroom.

Parking:

One space per unit can be covered or uncovered. Shared parking (driveway, garage, or carport) permitted provided ADU has direct, unobstructed access to parking space.

Setbacks:

Side: 1-story detached, 5 ft. min, 12 ft. total.

Attached or garage conversions must follow setbacks in Sec. 36.10.25.

Rear: 1-story detached, 10 ft. min.

Attached or garage conversions must follow setbacks in Sec. 36.10.25.

Height:

Detached: 16 ft. max. (1-story)
Attached: 28 ft. max. (2-story, over garage)

Location:

Attached: Basement, ground level or above garage with no internal access to primary dwelling.

Detached: Rear half of lot, at least 10 ft. from primary dwelling or other structures.

Above detached garage: rear half of lot.

Rear Yard Coverage:

30% maximum, including any other accessory structures, and projections of primary dwelling.

Materials/Design:

The design to conform in general to design of primary dwelling.

Entryways:

Attached ADUs must have a separate exterior entry.

For more ADU Information:

https://library.municode.com/ca/mountain_view/codes/code_of_ordinances?nodeId=PTIITHCO_CH36ZO_ARTIVREZO_DIV9REACUSST

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