Seattle building permits
Seattle's commercial permit activity is led by commercial alteration — 81% of the 51,054 permits PermitCore classifies across 7 commercial segments there. Reliable permit valuations total ≈$96.7B (across the 83% of filings with a valuation we can stand behind). Filing activity is up 21% over the last 90 days versus the prior 90 — a market heating up. Parcel-joined ~89%. 22 IBC segment tags. Field-level data-quality flags. Older history available via free signup or API; the recency module on this page surfaces the last 10 days.
51,054 permits classified · field-DQ-cleared · refreshed nightly
58,036 permits in Seattle. Use Explore the data below for the filterable view.
Where the value concentratesSeattle
Permit mix by segment
- Commercial Alteration41,525
Reliable value by segment
- Commercial Alteration$21.5B
- Commercial Demolition$12.8B
Filing momentum
+21% vs prior 90d
MAPPEDLast 10 days of permits · Parcel-joined ~89% · 22 IBC segments · field-level DQ flags
4 of 7 segments currentsee per-segment freshness →
index rebuilt today
Top contractors in Seattle
Ranked by permits indexed · Each links to that contractor in SeattleU OF W BUILDING PERMITCommercial Alteration595SEATTLE SCHOOL DISTRICT (A&S)Commercial Alteration512SEATTLE PARKS DEPTCommercial Alteration437SEATTLE HOUSING AUTH GENERALCommercial Alteration427CITY OF SEA F&FDCommercial Alteration322AMAZON.COMCommercial Alteration285PORT OF SEATTLE ENGINEERINGCommercial Alteration268BLANKET: BANK OF AMERICA TOWERCommercial Alteration219
Why this data is real
We classify permits into real segments — and label what we don't know.
Classified, not scraped
We read each permit's work-type, scope, and occupancy fields to place it in a real segment — so “commercial HVAC in Seattle” means real HVAC work, not a keyword match.
Parcel-joined + enriched
Every permit is joined to its tax lot and geocoded, with roof & HVAC sized — you see the building, not just the address.
— and we flag what we don't know
Coverage is labeled, missing fields show —, and where there are too few reliable filings to stand behind a value we publish —, never a fabricated number.
Seattle by segment
Sourced from the segment-distribution artifact · Each links to that segment in SeattleCommercial Alteration41,525Commercial New Construction3,373Multifamily New Construction2,775Commercial Demolition2,589Residential Demolition406Industrial New Construction257Multifamily Alteration129
15 segments: no permits in window.