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Monte Sereno, California: ADU Regulations

City or County:

Monte Sereno, California

Date Updated:

12.9.2018

Zoning:

R-1-8 | R-1-20 | R-1-44

Types of ADUs:

Attached, Detached

Stories:

Must comply with requirements of primary structure.

Lot Size:

8,000 sq. ft. minimum

Maximum ADU Floor Area:

Attached* maximums: R-1-8, 600 sq. ft. | R-1-20, 700 sq. ft. | R-1-44, 800 sq. ft.

Detached maximums: R-1-8, 900 sq. ft. | R-1-20, 1,000 sq. ft. | R-1-44, 1,200 sq. ft.

*Attached ADUs shall not exceed 50% of existing living area

Lot Coverage:

Must follow requirements established by the zoning district in which the lot is located.

Bedroom:

N/A

Storage:

No min/max

Kitchen:

All ADUs require separate kitchen facilities (permanent range, counters, refrigerator, and sink).

Bath:

All ADUs require separate bathroom facilities.

Note: Drainage and sewer connections should be assessed on a project by project basis.

Parking:

At least one uncovered parking space shall be provided for the accessory dwelling unit in addition to the parking required for the main dwelling unit. Some exceptions apply. See Section 10.06.140 (E) for exceptions.

Setbacks:

A detached accessory dwelling units shall comply with the setback requirements for an accessory structure of the applicable zoning district.

Note: Fire Department regulations should be assessed on a project by project basis.

Height:

A detached accessory dwelling unit shall comply with the structural and impervious coverage limits of the applicable zoning district, as well as the height requirements for a primary structure.

Location:

Attached ADUs can be on either the ground floor or second story of primary dwelling but cannot have direct access to the primary dwelling. Detached ADUs must be located at least 6' from primary dwelling.

Rear Yard Coverage:

Must follow requirements established by the zoning district in which the lot is located.

Design:

Accessory dwelling units shall be constructed with the materials identical in color, texture, and appearance to the primary dwelling, including but not limited to, roofing, siding, windows, and doors; and, the dwelling unit shall match the roof pitch and roof form of the primary dwelling so as to blend with the existing architecture.

Note: Historic Neighborhoods or Districts should be assessed on a project by project basis.

Entryways:

Source Code:

Important Note: Rules and regulations are updated and changed frequently. It’s one of our jobs to be up to speed and navigate those regulations. Let us know if our website isn’t up to date or if you have any information that could help. Cheers!