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Building permits in 98059, unincorporated King County

Data through September 2026 · updated 23 Oct 2026

339 building permits were issued in ZIP code 98059 by King County Department of Local Services, Permitting, October 2024 through September 2026: 5% of the 7,283 in unincorporated King County, the 8th busiest ZIP code. HVAC permits lead with 254. 157 permits in the last 12 months (Oct 2025–Sep 2026), 14% fewer than the 182 in the 12 months before. Permits from a city that runs its own permit office are not counted.

339permits in 98059
157last 12 months
94%for homes
Sep 2026records through

Permits in 98059 by kind of work

Share here is the part of the 339 permits in 98059; countywide is the same for all of unincorporated King County.

Kind of workPermitsShare hereCountywide
HVAC25475%69%
Remodels & repairs329%7%
Garages, sheds & shade structures154%4%
Demolition103%2%
New homes93%5%
Additions62%4%
ADUs & casitas2under 1%under 1%
Other113%8%

Download this table (CSV)

Permits in 98059 by year

Permits issued in each calendar year of the window.

YearMonthsPermitsPer year
2024 (from October)355220
202512175175
2026 (through September)9109145

Download this table (CSV)

How these numbers are made

Source: King County Local Services, monthly Issued Permits Reports (Excel), read 23 Oct 2026. We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out. The county's monthly report shows each permit's status only as of the month it was issued and never updates it, so no finished share is shown.

Building permits King County Local Services issues for unincorporated land only: homes, additions, remodels, heating and mechanical, demolition and commercial buildings. Seattle, Bellevue, Redmond, Kent, Renton and the other cities issue their own permits; Seattle and Bellevue have their own pages on this site. Fire, grading and right-of-way permits are not counted.

  • King County publishes its issued permits as a monthly spreadsheet; these pages stack the reports from October 2024 on.
  • Each permit is listed once, in the month it was issued, with its status as of that report, so the file can't say which permits were later finished, and there is no final date.
  • The county's file names no contractor (only the applicant, often the homeowner), so there are no contractor lists, rankings or firm pages for King County.
  • Electrical permits in unincorporated King County come from Washington Labor & Industries and plumbing permits from Public Health, so there are no electrical or plumbing counts here.
  • Residential mechanical permits (heat pumps, furnaces, ducts) are over half of the county's permits and carry no declared value; values are the job value on the other permits.
  • Additions, accessory buildings and remodels are split out of the county's addition/improvement permits by their descriptions.

Counts are permits, not jobs: one job can need several permits. Nobody paid to be on this page and nobody can. Sources and definitions →

Cite this page

Free to reuse with attribution (CC BY 4.0). Please credit Contractor Records and link to this page. Suggested citation:

Contractor Records, "Building permits in 98059, unincorporated King County", https://contractorrecords.com/king-county/zip/98059, data through September 2026, from King County Department of Local Services, Permitting building-permit records.

Link to a table: By kind of work · By year.

Download the tables (CSV): Permits in 98059 by kind of work · Permits in 98059 by year.

Common questions

  • How many building permits were issued in 98059?339 permits issued by the county in ZIP code 98059, October 2024 through September 2026: 254 HVAC, 32 remodels & repairs, 15 garages, sheds & shade structures. 157 were in the last 12 months.
  • What is built most in 98059?HVAC: 254 of the 339 permits (75%), against 69% countywide.
  • Who did the work in 98059?The county's file doesn't name contractors, so we can't say. Ask a contractor for the permit numbers of past jobs and check them with the county.