King County Addition Market Overview
King County's addition permit activity is currently steady, with 72 permits filed in the last 30 days compared to 69 in the prior 30-day window. On average, 26.5 addition permits are filed per month here based on the last six months of data.
Recent Addition Permits in King County
| Date | Address | Description | Est. Value | Status |
|---|---|---|---|---|
| 2026-08-01 | 1616 SW 100TH ST, SEATTLE WA 98146 | PHOENIX VAULT LLC - TENANT IMPROVEMENT - REVISION ... | $165,000 | Intake Processing |
| 2026-07-31 | 23419 107TH AVE SW, VASHON WA 98070 | (ABC) MEDEIROS - ABC DETACHED AG STRUCTURE | $338,589 | Intake Processing |
| 2026-07-31 | 17250 140TH AVE SE, RENTON WA 98058 | BANK OF AMERICA - TENANT IMPROVEMENT | $20,000 | Intake Processing |
| 2026-07-31 | 23319 NE 142ND PL, WOODINVILLE WA 98077 | (PRO) KRISHNASWAMY FOUNDATION REPAIR | Not listed on permit | Intake Processing |
| 2026-07-31 | 14600 SE 178TH PL, RENTON WA 98058 | BEYENE AFH ADDITION AND INTERIOR ALTERATION - INSR... | $191,655 | Intake Processing |
| 2026-07-31 | 49114 SE 115TH ST, NORTH BEND WA 98045 | (PRO) TOOMEY FOUNDATION REPAIR - RELATED TO FLOD26... | Not listed on permit | Intake Processing |
| 2026-07-31 | 5612 223RD AVE NE, REDMOND WA 98053 | PACHE INTERIOR REMODEL | Not listed on permit | Intake Processing |
| 2026-07-30 | 12116 UPPER PRESTON RD SE, ISSAQUAH WA 98027 | CHARLES FOUNDATION REPAIR- RELATED TO ADDC25-0327 | Not listed on permit | Intake Processing |
| 2026-07-29 | 40830 236TH AVE SE, ENUMCLAW WA 98022 | WATKINS BARN | $115,323 | Intake Processing |
| 2026-07-29 | 14608 SE 181ST ST, RENTON WA 98058 | PARRISH GARAGE CONVERSION | Not listed on permit | Intake Processing |
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Start Free →Frequently Asked Questions
How many Addition permits are filed in King County per month?
King County averages approximately 71 addition permits per month based on recent permit data collected by PermitGrab.
What types of Addition work require permits in King County?
In King County, permits are typically required for building addition permits including home extensions, room additions, and property expansions. Always check with King County's building department for specific requirements.
How can I find Addition leads in King County?
PermitGrab provides daily updates of all addition permits filed in King County, complete with addresses, project values, and lead scoring to help addition contractors find new jobs before the competition.
How quickly are Addition permits updated on PermitGrab?
Permits are collected daily from King County's open data portal and available on PermitGrab within 24 hours of filing.