County report · Washington

Building Permits in King County, Washington

Every building permit issued by the City of Seattle — counted and sorted by trade, category, and month. Free, and updated daily.

Source: City of Seattle open data — building permits. Source last updated: October 18, 2026 · Our last pull: October 18, 2026 · Figures are as reported by the City of Seattle.

Coverage: this report covers building permits issued by the City of Seattle, the largest jurisdiction in King County. Other King County cities publish their permits separately and are not in this feed, so totals here are Seattle totals — labeled as such, never blended. County-wide coverage is not implied.

290
Permits issued in October 2026 (to Oct 16)
507
Permits issued in September 2026
6,348
Permits issued, last 12 months
New Construction
Top trade, last 12 months (1,341 permits)
Citable figure: Seattle issued 507 building permits in September 2026.
PermitsByCounty data, King County (Seattle), September 2026 · Source: City of Seattle

Questions, answered from the data

How many building permits were issued in Seattle in September 2026?

507 building permits were issued in Seattle in September 2026, as reported by the City of Seattle.

How many building permits were issued in Seattle in the last 12 months?

6,348 building permits were issued in Seattle in the 12 months ending October 2026 (October 16, 2026), as reported by the City of Seattle.

What is the most common type of construction permit in Seattle?

New Construction permits are the most common classified type: 1,341 issued in the last 12 months (21.1% of all permits), as reported by the City of Seattle.

Permits by month

MonthPermits issued
October 2026 (to date)290
September 2026507
August 2026561
July 2026566
June 2026589
May 2026524
April 2026637
March 2026651
February 2026409
January 2026476
December 2025527
November 2025377
October 2025 (from Oct 17)234

October 2025 coverage begins October 17, 2025 (our first full pull); October 2026 is month-to-date.

Permits by trade — last 12 months

TradePermitsShare
General & Other4,00763.1%
New Construction1,34121.1%
Demolition5278.3%
Roofing4467.0%
HVAC110.2%
Electrical80.1%
Plumbing70.1%
Solar10.0%

Permits by category — last 12 months

CategoryPermitsShare
Residential5,00478.8%
Non-Residential1,34421.2%

Category is the City of Seattle's own mapped class for each permit (Residential / Non-Residential).

Most recent permits issued in October 2026

PermitTradeIssued
500 9Th Ave N #7167871-CN
Construct Tenant Improvement Project at 500 9th Ave N for installation of full-height demountable partition…		General & Other2026-10-16
3244 57Th Ave Sw #7167807-RR
Replace the existing house roof with new architectural asphalt shingles		Roofing2026-10-16
9551 45th AVE NE #7167457-CN
Construct substantial alterations to existing one-family dwelling subject-to-field inspection (STFI).		General & Other2026-10-16
2121 7Th Ave #7167268-CN
Construct Tenant Improvement Project at 2121 7th Ave to install full-height demountable partition walls and…		General & Other2026-10-16
6515 23Rd Ave Ne #7166819-CN
Siding replacement and like-for-like window replacement to existing multi-family building subject-to-field…		General & Other2026-10-16
2116 40Th Ave E #7166383-DM
Demolish one-family dwelling subject to field inspection (STFI)		Demolition2026-10-16
8013 8Th Ave Nw #7166333-CN
Construct exterior alteration to existing two-family dwelling to enlarge a window subject to field inspect…		General & Other2026-10-16
6417 Linden Ave N #7162737-CN
Alterations to existing dwelling unit Subject To Field Inspection (STFI)		General & Other2026-10-16

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