← All reportsSan Mateo County, CA · Monthly Report

August 2026 Building Permits

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

San Mateo County, CA issued 291 building permits in August 2026, up 26% from the prior month. The most active zip code was 94025 with 53 permits. Re-Roof was the top permit type, making up 19% of all permits issued.

Permits issued
291
vs. prior month
+26%
231 last month
Most active zip
94025
53 permits
Top permit type
Re-Roof
19% of total

Permit activity by zip code

Top 10 zip codes by permit volume — August 2026

94025
53
94062
42
94402
29
94015
25
94063
23
94018
19
94019
18
94037
16
94061
16
94038
13

Permits by type

August 2026 · San Mateo County, CA

Re-Roof
54 (19%)
Auto Issue Permit
39 (13%)
Residential Addition / Alteration to Existing Residence
29 (10%)
Electrical Service Upgrade
25 (9%)
Building Permit Revision
21 (7%)
HVAC, Furnace, Air Conditioning, and Heat Pump
14 (5%)
Water Heater
14 (5%)
Fire Systems
11 (4%)
Plumbing
11 (4%)
Demolition (Minor / Major / Pool)
10 (3%)
Kitchen / Bath Remodel
10 (3%)
Landscaping / Retaining Wall
8 (3%)
Commercial Addition / Alteration / Tenant Improvement / Change of Occupancy or Use
7 (2%)
Information Notice
7 (2%)
Residential New Single Family / Multi Family / Manufactured / Detached ADU
5 (2%)
Deck / Patio / Porch
4 (1%)
Electric Vehicle Charger
4 (1%)
Siding and Stucco
4 (1%)
Window or Door
4 (1%)
Residential Detached Non-Habitable Accessory Structures
2 (1%)
Temporary Power Pole
2 (1%)
Commercial New
1 (0%)
Electric Generator
1 (0%)
Energy Storage Systems
1 (0%)
PV Solar
1 (0%)
Signs and Awnings Permit
1 (0%)
Temporary Structure
1 (0%)

Other months — San Mateo County

September 2026July 2026
View all counties →

Get alerted when new permits are filed in San Mateo County

Pick your zip codes and permit types. We'll email you every Monday, Wednesday, and Friday.

Start free