Pool Permits: Redwood City vs San Mateo
How do pool permits rules compare between Redwood City, CA and San Mateo, CA?
Redwood City and San Mateo have similar restriction levels.
Redwood City, CA
San Mateo County
In unincorporated San Mateo County, building a swimming pool or spa requires a building permit and a boundary survey from the Planning and Building Department. Applicants submit plot plans, structural/plumbing/electrical and mechanical details, engineering and energy calculations, and pay building, plan-check and related fees.
View full Redwood City rules →San Mateo, CA
San Mateo County
Swimming pools in San Mateo require building, electrical, and plumbing permits. Plans must verify proper setbacks per the zoning code. Pool barriers must comply with the Swimming Pool Safety Act. The Building Division reviews pool applications at 650-522-7200.
View full San Mateo rules →Key Facts Comparison
| Fact | Redwood City | San Mateo |
|---|---|---|
| Permit required | Yes - County building permit for pool/spa | - |
| Survey required | Yes - boundary survey for pools/pool houses/cabanas | - |
| Governing code | County Title 10 Building Regulations | - |
| Submittals | 3 sets plot plans + construction & engineering details | - |
| Fees | Building, plan-check, plumbing, electrical, filing, microfilm | - |
| Barrier rules | Set by CA state law (Pool Safety Act) | - |
| Permits | - | Building + electrical + plumbing |
| Survey | - | Required to verify setbacks |
| Barrier | - | 60 in + one safety feature |
| Electrical | - | GFCI required |
| Contact | - | Building Division — 650-522-7200 |
Highlighted rows indicate differences between cities.
Redwood City FAQ
Do I need a permit for a pool in unincorporated San Mateo County?
Yes. The County Planning and Building Department requires a building permit for swimming pools and spas, plus a boundary survey because pools, pool houses and cabanas are listed as projects requiring a survey.
Does the County set the pool fence rules?
No. The County's published pool/spa permit materials do not specify barrier dimensions. Enclosure and drowning-prevention requirements come from California state law (Health & Safety Code 115922-115928), which applies when the building permit is issued.
San Mateo FAQ
What permits do I need for a pool in San Mateo?
Building, electrical, and plumbing permits are all required. A survey to verify setbacks is part of the application.
What safety features are required?
A 60-inch barrier with self-closing, self-latching gates plus at least one additional safety feature (cover, alarm, or mesh fencing).
How do I apply for a pool permit?
Contact the Building Division at 650-522-7200. Submit plans showing the pool location, setbacks, barrier details, and utility connections.
Compare other topics
See how Redwood City and San Mateo compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool