Title 8 — ZONING & DEVELOPMENT CODE
Chapter 8.220 — S101 DISTRICT (COMBINING DISTRICT, PALOMAR PARK)
San Mateo County Zoning Code · 2026-06 edition · ingested 2026-07-06 · San Mateo County
8.220.010 - Regulations For “S-101” Combining District (Palomar Park). ¶
The following regulations shall apply in any single-family residential district with which the “S-101,” District is combined.
8.220.020 - Building Site Width. ¶
The minimum building site width shall be an average of 75 feet.
8.220.030 - Building Site Area. ¶
The minimum building site area shall be 20,000 sq. ft.
8.22.040 - Development Density. ¶
The maximum density of development shall be 2.2 dwelling units/net acre.
8.22.050 - Building Setbacks. ¶
The minimum setbacks shall be:
Front Rear Side Setback Setback Setback 20 feet 20 feet 10 feet
8.220.060 - Building Site Coverage Area Ratio. ¶
The maximum building site coverage area ratio shall be .25 (25 percent) and shall include all: (1) buildings, (2) accessory buildings, or (3) structures such as patios, decks, balconies, porches, bridges, and other similar uses which are eighteen (18) inches or more above the ground.
8.220.070 - Building Floor Area. ¶
The maximum building floor area shall be established according to the following table.
Building Site Area Maximum Floor Area £10,000 sq. ft. 2,600 sq. ft. 10,001 - 30,000 sq. ft. .30 (building site area - 10,000) + 2,600 sq. ft. >30,000 sq. ft. 8,600 sq. ft.
The maximum building floor area shall include the floor area of all stories of all buildings and accessory buildings on a building site. Maximum building floor area specifically includes: (1) the floor area of all stories excluding uninhabitable
attics as measured from the outside face of all exterior perimeter walls, (2) the area of all decks, porches, balconies or other areas covered by a waterproof roof which extends four (4) or more feet from exterior walls, and (3) the area of all garages and carports that exceed 400 sq. ft.
8.220.080 - Parcel Merger To Establish Maximum Building Floor Area. ¶
Contiguous parcels may be combined to establish a building site area to be used to calculate the maximum building floor area provided those parcels are first merged pursuant to merger provisions of the County Subdivision Regulations.
8.22.090 - Parcel Division And Maximum Building Floor Area. ¶
A parcel may not be divided if such division would result in a building site area less than the minimum required to maintain conformity with the building floor area requirements of this district.
8.22.100 - Building Height. ¶
The maximum building height shall be 28 feet. Building height shall be measured as the vertical distance from: (1) any point on the natural grade to the topmost point of the building immediately above, or (2) any point on the lowest floor, if the lowest floor is below the natural grade, to the topmost point of the building immediately above.
Chimneys, pipes, mechanical equipment, antennae and other common facilities may extend beyond 28 feet to a maximum of 36 feet as required for safety or efficient operation.
8.22.110 - Building Height For Garages On Downhill Slopes. ¶
The maximum building height for an attached or detached garage on a downhill slope that is allowed by Section 8.348.030 to extend into the front setback to ensure safe access is 28 feet. Building height shall be measured as the vertical distance from any point on the natural grade to the topmost point of the building immediately above.
Maximum plate height for any portion of an attached or detached garage that extends into the front setback shall be 10 feet. Plate height shall be measured as the vertical distance from any point on the floor to the bottom of the lowest ceiling joist where the framing of the roof begins.
No second story shall be allowed above or below any portion of a garage on a downhill slope that is allowed to extend into the front setback.
8.220.120 - Daylight Plane. ¶
The daylight plane shall be established by measuring along all setback lines a vertical distance of 20 feet from the natural grade and then inward at an angle of 45 degrees until a maximum building height of 28 feet is reached.
Certain architectural features shall be allowed to extend into all setback areas according to the provisions of Section 8.340.010.
Chimneys, pipes, mechanical equipment, antennae and other common facilities may extend into the daylight plane up to a maximum of 36 feet as required for safety or efficient operation.
Additionally, architectural features, such as dormers or gables, shall be allowed to extend into the daylight plane of the front and rear setbacks provided that: (1) they measure perpendicularly to the daylight plane no more than 15 feet in length and (2) they measure no more than a vertical distance of 24 feet from the natural grade.
(Prior code § 6300.7 Ord. 3319; 04/29/91
(Prior code § 6300.7 Renumbered to §6300.10 Ord. 3535; 01/25/94)