Front:

20 feet

Sides:

10 feet

-

When the side property line fronts a public or private street

5 feet

-

All other cases

Rear:

20 feet

SECTION 6300.4.27. BUILDING SITE COVERAGE AREA RATIO. The maximum building site coverage area ratio shall be .50 (50%) and shall include all: (1) buildings, (2) accessory buildings, and (3) structures such as patios, decks, balconies, porches and other similar uses which are 18 inches or more above the ground, except fences/walls.

SECTION 6300.4.28. BUILDING FLOOR AREA. The maximum building floor area shall be established according to the following table:

Building Site Area

Maximum Floor Area

≤5,000 sq. ft.

2,600 sq. ft.

>5,000 sq. ft.

.26 (building site area - 5,000) + 2,600 sq. ft.

Floor area specifically includes: (1) the area of all stories of all main and accessory buildings on a building site 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 or more feet from exterior walls, and (3) the area of all garages and carports that exceed 400 sq. ft., but excludes uninhabitable attics and sub-grade basements.

SECTION 6300.4.29. BUILDING HEIGHT. The maximum building height shall be 28 feet, not to exceed two habitable stories. Building height shall be measured as the vertical distance from any point on the existing grade to the topmost point of the building immediately above. Chimneys, pipes, mechanical equipment, antennae, and other common facilities may extend beyond the respective maximum height to a maximum of 36 feet as required for safety or efficient operation.

SECTION 6300.4.30. DAYLIGHT PLANES. The daylight planes shall be established by measuring along the side setback lines a vertical distance of 16 feet from the existing grade and then inward at an angle of 45 degrees until a maximum height of 28 feet is reached.

Daylight planes shall not be applicable to the side setback line of the street-facing side of a corner parcel.

Certain architectural features shall be allowed to extend into all yard setback areas according to the provisions of Zoning Regulations Section 6406.

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 side setbacks provided that: (1) they measure perpendicularly to the daylight plane no more than 20 feet in continuous or cumulative length on each side, and (2) they measure no more than 24 feet in height from the existing grade.

SECTION 2. The San Mateo County Ordinance Code, Division VI, Part One, Chapter 2, Section 6111, be amended to add the S-74 Combining District.

SECTION 3. This ordinance shall be in full force and effect thirty (30) days after adoption by the San Mateo County Board of Supervisors.