Federal Data Hub › Census Building Permits · JSON

King County, WA

Name: Building Permits — King County, WA
License: https://creativecommons.org/publicdomain/zero/1.0/

Residential building permits · 2015–2025

Housing units authorized (2025): 8,505
Construction valuation (2025): $2,451,903,324
By structure type (2025): 1-unit 2,510 · 2-unit 714 · 3-4 179 · 5+ 5,102

Units authorized by year

Year	Units	Valuation
2025	8,505	$2,451,903,324
2024	10,564	$2,710,126,160
2023	10,601	$2,504,322,180
2022	18,830	$3,777,017,823
2021	19,549	$3,915,263,113
2020	12,337	$2,507,261,976
2019	17,919	$3,565,641,999
2018	18,460	$3,389,593,408
2017	18,641	$3,909,651,114
2016	17,699	$3,375,978,228
2015	18,537	$3,766,558,325

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.