Swimming Pool, Hot Tub, or Spa Permit Requirements in San Mateo County, CA
San Mateo County Planning and Building Department serves all UNINCORPORATED areas of San Mateo County, including the Midcoast communities of Montara (94037), Moss Beach (94038), El Granada (94018), Princeton, and Miramar. This record currently covers 94037 Montara only; other unincorporated Coastside ZIPs will be added in follow-up work. Incorporated cities (Daly City, San Mateo, Redwood City, Pacifica, Half Moon Bay, Belmont, Burlingame, Foster City, Menlo Park, etc.) run their own building departments — confirm parcel is unincorporated before applying here. CRITICAL Coastside overlay: all of 94037 is in the California Coastal Zone, so nearly any development (new structure, major addition, grading, demolition, some remodels) requires a Coastal Development Permit (CDP) from SMC Planning under the Midcoast Local Coastal Program (Midcoast LCP, approved by California Coastal Commission August 2012). Only narrow exemptions apply; appeals go to the Coastal Commission. California 2025 Building Standards Code (CRC/CBC/CFC) took effect statewide 2026-01-01; state code is enforceable regardless of whether the County has signed its local 2025 adoption ordinance (historical adoption was Ord. 4873 on 2022 cycle). Portions of Montara (upslope toward Montara Mountain / McNee Ranch) are in CAL FIRE Very High Fire Hazard Severity Zones; 2025 CRC Chapter 7A (ignition-resistant construction) applies. Seismic Design Category D; ultimate design wind ~110 mph. Parcels use septic (SMC Environmental Health Services, LAMP program) and private wells unless on Montara Water & Sanitary District (MWSD, 650-728-3358) sewer+water service. Online permits via Accela Citizen Access (ACA) at aca-prod.accela.com/smcgov. Fee schedules effective 2026-04-01. Building counter at 455 County Center, Redwood City.
By Joey, Founder · Last verified April 24, 2026 · How we research →
When you need a Pool & Hot Tub permit in San Mateo County
94037), an in-ground swimming pool requires a building permit, electrical permit, AND Coastal Development Permit (pool construction in Coastal Zone is never exempt). 48-inch barrier, self-closing/self-latching gate, alarm per 2025 CRC Appendix V. Equipotential bonding per 2022 CEC 680.26. Drought-conscious pool covers required by some CalGreen jurisdictions.
94037), an above-ground pool deeper than 24 inches requires a building and electrical permit. Pool wall counts as the barrier if at least 48 inches above grade on the outside and the ladder is secured or removable. CDP screening required.
Swimming Pool, Hot Tub, or Spa Permit Costs: San Mateo County vs. Nearby
| City | Estimated Fee |
|---|---|
| San Mateo County | N/A |
| Los Angeles | $200 – $3,000 |
| Sacramento County | $50 – $800 |
| San Diego | $170 – $2,550 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all San Mateo County permit costs →
Zoning & HOA Considerations
Pools may require zoning approval for setback compliance. Many jurisdictions have minimum distance requirements from property lines and easements.
If you live in an HOA community: many HOAs regulate pool placement, fencing requirements, and equipment screening (pump/filter visibility). Some communities prohibit above-ground pools entirely. Check your CC&Rs before planning.
Estimated Project Timeline in San Mateo County
Here's a typical timeline for a swimming pool, hot tub, or spa project in San Mateo County, CA:
Timeline is based on San Mateo County's typical about 9 weeks permit processing time. Actual timelines vary by project complexity, completeness of application, and current department workload.
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Frequently Asked Questions
Contact San Mateo County's building department for current Swimming Pool, Hot Tub, or Spa permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Swimming Pool, Hot Tub, or Spa projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in San Mateo County can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Swimming Pool, Hot Tub, or Spa permits in San Mateo County is about 9 weeks. More complex projects may take longer if plan review is required.
If you live in an HOA community, you may need architectural review approval in addition to a building permit. HOA rules and city building codes are separate, you may need to satisfy both. Review your CC&Rs and submit to your HOA's architectural review committee before starting work.
Learn More About Swimming Pool, Hot Tub, or Spa Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Swimming Pool, Hot Tub, or Spa Guide →