A Resident's Guide to San Mateo's Local Ordinances

San Mateo is a mid-sized city in San Mateo County, California, with about 106000 residents. Like most cities its size, it has a set of local rules that may differ significantly from neighboring municipalities. Here is an overview of 33 ordinances across 18 categories that affect daily life in San Mateo.

Rental Property Rules

Just Cause Eviction: San Mateo adopted an emergency just cause eviction ordinance (Ord. 2019-12) providing local protections that complement AB 1482.

Also covered: Rent Control (moderate), Rental Registration (permissive). See the full rental property rules guide for San Mateo for details.

Landscaping Rules

Water Restrictions: San Mateo's water is provided by Cal Water (San Mateo District). Water conservation ordinances (SMMC Ch.

Also covered: Tree Trimming (moderate), Rainwater Harvesting (moderate), Artificial Turf (moderate). See the full landscaping rules guide for San Mateo for details.

Data Centers & Crypto Mining

Data Center Noise Limits: City of San Mateo Municipal Code Sec. 7.30.040 caps noise measured on the receiving property: 70 dB anytime in manufacturing zones, and 60 dB daytime, 50 dB nighttime at single-family homes.

Also covered: Data Center Zoning & Siting (moderate). See the full data centers & crypto mining guide for San Mateo for details.

Short-Term Rentals

Occupancy Limits: San Mateo limits STR occupancy to two people per bedroom or ten people per property, whichever is less, under Chapter 5.66. Events including weddings, parties, and corporate functions are prohibited at STR properties.

Also covered: Short-Term Rental Parking Rules (strict). See the full short-term rentals guide for San Mateo for details.

Parking Rules

Abandoned Vehicles: San Mateo enforces the 72-hour vehicle storage limit on public streets under California Vehicle Code 22651. Inoperable vehicles on private property visible for more than 10 days are prohibited.

Also covered: Street Parking Limits (moderate), Overnight Parking (moderate), EV Charging (moderate). See the full parking rules guide for San Mateo for details.

Animal Ordinances

Exotic Pets: San Mateo follows California CDFW regulations banning many exotic species. Local animal code may restrict wild or dangerous animals.

Also covered: Wildlife Feeding (moderate). See the full animal ordinances guide for San Mateo for details.

Fence Regulations

Neighbor Fence Rules: Shared fence cost and responsibility between neighbors in San Mateo is governed by California Civil Code §841 (Good Neighbor Fence Act). Disputes are civil matters.

Home Business

Home Daycare: Small family daycare homes (up to 8 children) are permitted by right in all residential zones under California H&S Code Section 1597.45. Large family daycare homes (9-14 children) require a conditional use permit.

Food Trucks & Mobile Vendors

Food Truck Permits: Food trucks in San Mateo require a San Mateo County Health Permit for mobile food operations and compliance with city zoning and business licensing requirements. Food trucks on private property require property owner consent.

Also covered: Vending Zones (moderate). See the full food trucks & mobile vendors guide for San Mateo for details.

Soliciting & Door-to-Door

No-Knock Registry: San Mateo respects no-soliciting signs posted by residents. The city does not maintain a formal no-knock registry.

Swimming Pools & Spas

Pool Permits: Swimming pools in San Mateo require building, electrical, and plumbing permits. Plans must verify proper setbacks per the zoning code.

Also covered: Fencing & Safety Requirements (moderate). See the full swimming pools & spas guide for San Mateo for details.

Fire Regulations

Brush Clearance: Properties in fire-prone areas of San Mateo must maintain defensible space under California PRC 4291. The San Mateo Consolidated Fire Department enforces vegetation management requirements.

Also covered: Wildfire Zones (moderate). See the full fire regulations guide for San Mateo for details.

Cannabis Regulations

Home Cultivation: San Mateo adopted Ordinance 2017-4 adding Chapter 7.45 to prohibit outdoor cannabis cultivation within city limits. Indoor cultivation of up to six plants per residence is protected under Proposition 64 (CA H&S Code Section 11362.2).

Noise Ordinances

Leaf Blower Rules: San Mateo specifically regulates leaf blower operation under Chapter 10.80 in addition to the general noise ordinance. Leaf blowers must comply with both the noise standards in Chapter 7.30 and the specific provisions of Chapter 10.80.

Solar Energy

HOA Restrictions: California's Solar Rights Act (Civil Code 714) prohibits HOAs from effectively restricting solar panel installations. HOA rules cannot increase installation cost by more than $1,000 or reduce efficiency by more than 10%.

Property Maintenance

Snow & Sidewalk Clearing: San Mateo has a mild Mediterranean climate on the San Francisco Peninsula and does not experience snowfall. There is no snow removal or ice clearing ordinance.

Sign Regulations

Political Signs: Political signs in San Mateo are protected by the First Amendment and California Elections Code Section 18310. Signs on private property cannot be prohibited.

Trash & Recycling

Pickup Rules & Schedules: Recology San Mateo County provides weekly curbside collection of trash, recyclables, and organic waste. SB 1383 requires organic waste separation.

What to Do With This Information

This overview covers the big picture, but the details matter. Each ordinance page for San Mateo includes the full text, violation penalties, and frequently asked questions. Use those pages when you need specifics.