San Mateo County · Building on your lot
Building on your lot in San Mateo County
San Mateo County's code applies only in unincorporated areas of the county. There it limits oversized vehicle parking on posted county roads and requires covers on new pools and hot tubs.
Key points
- Oversized vehicles: Oversized vehicles over 6 feet high and trailers may stay in posted no-oversized-parking zones at most 8 hours, only for emergency repairs or towing.
- Pool covers: San Mateo County requires covers on all new swimming pools and hot tubs in unincorporated areas.
Each rule below is marked San Mateo County code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.
San Mateo County's code applies in the unincorporated areas of the county. Cities in San Mateo County have their own codes and their own pages.
RV and boat parking
| Parking on the street |
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Swimming pools
| Maintenance and empty pools |
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Other San Mateo County rules on this
San Mateo County's code also has these chapters. We have not summarized their values on this page yet; read them in the library.
- Permit to keep more dogs and cats (Ch. 6.16)
Who this affects
Frequently asked questions
Can I park an RV or boat at my home in San Mateo County?
Oversized vehicles over 6 feet high and trailers may stay in posted no-oversized-parking zones at most 8 hours, only for emergency repairs or towing.
What are the pool fence and setback rules in San Mateo County?
San Mateo County requires covers on all new swimming pools and hot tubs in unincorporated areas.
General information, not legal advice.
Ask about a specific San Mateo County property
Ask GoCodebook how these rules apply to your address and get an answer that cites the section.
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