Building permits · May 2026
San Mateo County Building Permits
Monthly residential building permits for San Mateo County, California — 84 units authorized in May 2026, 1,382 over the last 12 months — latest month -87% vs. a year earlier.
84
Units (latest month)
31
Single-family units
45
Multifamily (5+) units
$25,807,113
Reported value
Trailing 12 months: 1,382 units permitted · latest month -87% vs. a year earlier.
| Structure type | Units | Share |
|---|---|---|
| Single-family (1-unit) | 31 | 36.9% |
| 2-unit structures | 8 | 9.5% |
| 3–4 unit structures | 0 | 0.0% |
| Multifamily (5+ units) | 45 | 53.6% |
| All units | 84 | 100% |
San Mateo County building permits — FAQ
How many building permits were issued in San Mateo County?+
84 new residential units were authorized in San Mateo County, California in May 2026, and 1,382 over the trailing 12 months (U.S. Census Building Permits Survey).
What share of San Mateo County permits are multifamily?+
63.1% of San Mateo County's May 2026 permitted units were in multifamily (2+ unit) buildings.
Where does this data come from?+
Figures come from the U.S. Census Bureau's Building Permits Survey, a monthly census of permit-issuing jurisdictions. PUMSdata is independent and not affiliated with the Census Bureau.