A Resident's Guide to South San Francisco's Local Ordinances

South San Francisco, California may not be the biggest city in the state, but it has its own set of local rules that residents need to follow. With 38 tracked ordinances across 11 categories, there is more here than you might expect.

Noise Ordinances

Construction Hours: South San Francisco permits construction with a valid city permit weekdays 8 AM–8 PM, Saturdays 9 AM–8 PM, and Sundays/holidays 10 AM–6 PM. Equipment noise cannot exceed 90 dB at 25 feet.

Also covered: Quiet Hours (moderate), Barking Dogs (moderate). See the full noise ordinances guide for South San Francisco for details.

Parking Rules

Commercial Vehicle Restrictions: South San Francisco restricts large commercial vehicles from parking in residential zones. South San Francisco's industrial character means commercial vehicles are common, but residential streets remain regulated..

Also covered: Street Parking Limits (moderate), Driveway Rules (moderate), RV & Boat Parking (moderate). See the full parking rules guide for South San Francisco for details.

Landscaping Rules

Grass Height Limits: South San Francisco requires property owners to maintain lots free of excessive weeds and overgrown vegetation. Overgrowth creating fire hazards or nuisances is subject to code enforcement and potential city abatement..

Also covered: Water Restrictions (moderate), Tree Removal & Heritage Trees (moderate), Tree Trimming (moderate). See the full landscaping rules guide for South San Francisco for details.

Short-Term Rentals

Occupancy Limits: South San Francisco Municipal Code Section 20.350.037 caps short-term vacation rental occupancy by stay type. Hosted stays (host present in the dwelling) are limited to a maximum of 2 guests at one time.

Also covered: Insurance Requirements (permissive), Parking Rules (moderate), Noise Rules (moderate). See the full short-term rentals guide for South San Francisco for details.

Accessory Structures

Carport Rules: South San Francisco Municipal Code Chapter 20.300 (Lot and Development Standards) and Chapter 20.330 (On-Site Parking and Loading) govern carports as accessory structures. Unlike many neighboring cities, SSFMC Section 20.330.004 expressly allows the required residential parking space to be 'within a carport or garage' — open carports are an acceptable form of required parking.

Also covered: ADU Rules (moderate), Shed Rules (moderate), Garage Conversions (moderate). See the full accessory structures guide for South San Francisco for details.

Fire Regulations

Outdoor Burning: Open burning is banned in South San Francisco under BAAQMD Regulation 5. Wood-burning devices (fireplaces, stoves, fire pits) are prohibited on Spare the Air Alert days under BAAQMD Regulation 6, Rule 3..

Also covered: Fireworks (strict), Fire Pit Rules (strict). See the full fire regulations guide for South San Francisco for details.

Fence Regulations

Height Limits: South San Francisco fence heights are governed by SSFMC Title 20 (Zoning Code). Standard residential limits are 3–4 ft in front yards and up to 6 ft in side/rear yards.

Also covered: Permit Requirements (moderate), Neighbor Fence Rules (moderate). See the full fence regulations guide for South San Francisco for details.

Animal Ordinances

Dog Leash Laws: South San Francisco requires dogs to be leashed on public property. No voice-control exemption exists in San Mateo County.

Also covered: Breed Restrictions (moderate), Beekeeping (moderate), Exotic Pets (moderate). See the full animal ordinances guide for South San Francisco for details.

Swimming Pools & Spas

Fencing Requirements: Pool fences in South San Francisco must comply with California H&S §115920: minimum 60-inch barrier, self-closing/self-latching gates, ground clearance under 2 inches, no gaps over 4 inches. Two drowning prevention features required..

Also covered: Above-Ground Pools (moderate), Safety Rules (moderate). See the full swimming pools & spas guide for South San Francisco for details.

Home Business

Zoning Restrictions: Home-based businesses in South San Francisco require a Home Occupation Permit under SSFMC Title 20. The business must be incidental to the residential use with no exterior evidence or non-resident employees..

Also covered: Signage Rules (moderate), Customer Traffic Restrictions (moderate). See the full home business guide for South San Francisco for details.

Environmental Rules

Flood Zones: Parts of South San Francisco near the Bay shoreline and low-lying industrial areas are in FEMA flood zones. New construction in Special Flood Hazard Areas requires elevation and a floodplain development permit.

What to Do With This Information

If you are moving to South San Francisco, buying a home, or starting a project, use this as a starting point. Each category links to detailed pages with the full text, penalties, and FAQs. Verify anything time-sensitive with South San Francisco's city hall or code enforcement office.