R-1 Hillside above 150 Mean Sea Level

Development Standards

   
Lot Area Minimum 7,500 sq. ft. 
Density Maximum (Units/Acre) 1
Lot Width, Minimum 60'
Lot Width, Minimum Street Frontage 40'
Lot Coverage Maximum 35%
Front Setback 20'
Rear Setback 20'
Interior Side Setback 8'
Street Side Setback 12'
Maximum Stories (building foot print <25% slope) 2
Maximum Stories (building foot print >25% slope) 3
Maximum Height (building foot print <25% slope) 30'
Maximum Height (building foot print >25% slope) 35'

Floor Area Sliding Scale

Formula   
35% of Lot Size 8,000 sq. ft. or less.
10% of Lot Size + 2,000 sq. ft.  8,001 sq. ft. - 19,999 sq. ft.
5% of Lot Size + 3,000 sq. ft. 20,000 sq. ft. - 39,999 sq. ft.
5,000 sq. ft. Maximum 40,000 sq. ft. +

Adjusted Floor Area is defined as the gross exterior floor area (as measured from the exterior framing of the outside wall) in the main dwelling PLUS:

(a) Any garage space after the first 500 square feet;

(b) Any enclosed accessory buildings; and

(c) Any potential living space with minimum dimensions of 8 feet by 10 feet and 7.5 feet head room; and

(d) Any accessory dwelling unit. 

The maximum size of R-1-H, R-1-C, and R-1 structures located above 150 mean sea level shall be as described above. The maximum house size shall be further limited by the requirement to meet all applicable design review findings. Should there be no other option but to allow development on a visible hillside or ridge, the Town may further limit the size of development, i.e., square footage allowed within any structure, should it be determined that such a limitation would reduce the visual impact of a development. 

Existing Enclosed Structures — Exemption:

Existing enclosed structures that do not conform to the standards of Table 4E may be altered or reconstructed, provided that: (a)  The alterations or reconstruction shall not alter the exterior building dimensions of the structure to an amount greater than was contained in the original structure; and  (b)  Said work otherwise meets the provisions of the San Anselmo Municipal Code. 

Dwellings built, enlarged, or expanded before February 26, 1991, which do not exceed the Maximum Adjusted Floor Area, may exceed this number by not more than 10% subject to Design Review approval and the findings below. 

Dwellings built, enlarged, or expanded before February 26, 1991, which exceed the Maximum Adjusted Floor Area, may exceed this number by not more than 500 square feet subject to Design Review approval and the findings below.

Conformance to findings in Sections 10-3.1505(a) and (b); 

Will not be materially visible offsite; 

Is of a scale, intensity, and design that integrates with the existing character of the surrounding neighborhood; and 

Internal efficiency/space utilization problems exist.