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October 2026 Building Permits

Official permit data from San Mateo County — updated Mon, Wed & Fri from the county permitting office.

San Mateo County, CA issued 312 building permits in October 2026, down 6% from the prior month. The most active zip code was 94025 with 61 permits. Re-Roof was the top permit type, making up 15% of all permits issued.

Permits issued
312
vs. prior month
-6%
333 last month
Most active zip
94025
61 permits
Top permit type
Re-Roof
15% of total

Permit activity by zip code

Top 10 zip codes by permit volume — October 2026

94025
61
94062
60
94028
23
94037
21
94063
21
94402
20
94018
17
94061
16
94038
15
94070
12

Permits by type

October 2026 · San Mateo County, CA

Re-Roof
47 (15%)
Building Permit Revision
37 (12%)
Auto Issue Permit
31 (10%)
Residential Addition / Alteration to Existing Residence
29 (9%)
Electrical Service Upgrade
22 (7%)
Plumbing
16 (5%)
Landscaping / Retaining Wall
14 (4%)
Fire Systems
13 (4%)
Kitchen / Bath Remodel
13 (4%)
Electric Vehicle Charger
11 (4%)
HVAC, Furnace, Air Conditioning, and Heat Pump
9 (3%)
Window or Door
8 (3%)
Demolition (Minor / Major / Pool)
7 (2%)
Water Heater
7 (2%)
Residential New Single Family / Multi Family / Manufactured / Detached ADU
6 (2%)
PV Solar
5 (2%)
Siding and Stucco
5 (2%)
Temporary Power Pole
5 (2%)
Commercial Addition / Alteration / Tenant Improvement / Change of Occupancy or Use
4 (1%)
Residential Detached Non-Habitable Accessory Structures
4 (1%)
Deck / Patio / Porch
3 (1%)
Electric Generator
3 (1%)
Information Notice
3 (1%)
Swimming Pool / Spa / Hot Tub / Pond
3 (1%)
Temporary Structure
3 (1%)
Propane Tank / Water Storage Tank
1 (0%)
Signs and Awnings Permit
1 (0%)
Skylight
1 (0%)
Stop Work Notice
1 (0%)

Other months — San Mateo County

November 2026September 2026August 2026
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