Federal Data HubCensus Building Permits · JSON

San Mateo County, CA

Residential building permits · 2015–2025

Housing units authorized (2025)
2,216
Construction valuation (2025)
$850,964,322
By structure type (2025)
1-unit 457 · 2-unit 48 · 3-4 3 · 5+ 1,708

Units authorized by year

YearUnitsValuation
20252,216$850,964,322
20241,088$577,977,677
20231,173$443,893,104
20221,994$586,068,060
20211,896$771,112,297
20201,074$450,934,436
20191,352$580,290,212
20181,116$454,076,358
20171,582$547,568,668
20161,975$627,093,233
20151,620$555,610,581

The Census Building Permits Survey counts new privately-owned housing units authorized by building permits — a leading indicator of housing supply. "1-unit" is single-family; "5+ units" is larger multifamily. Figures are imputation-adjusted to cover permit offices that did not report.

Source: Census Building Permits Survey. License: CC0 1.0.