41,267 Commercial Alteration permits in Seattle
Updated 8h ago via daily refresh. Commercial Alteration subset of the 740,200 total Seattle permits indexed.
Permits indexed41,267Across Seattle
RefreshDailyLast update 2026-05-24 02:00 PT
Cohort classifierLLM-1Field-level DQ flags inline
What this cohort covers
What counts as Commercial Alteration in Seattle?
Commercial alteration permits cover the broad set of changes to existing commercial buildings — tenant improvements, additions, structural alterations, adaptive reuse, AND roofing/envelope work that doesn't trigger a separate sub-cohort. The highest-volume commercial cohort in most US metros because TI turnover + re-roofing cycles dominate filings against existing stock.
No demo commercial alteration permits in the current Seattle sample — cohort grid populates from the live API at B1.6+.
Other cohorts in Seattle
- Commercial New Construction3,371
- Multifamily New Construction2,802
- Commercial Demolition2,577
- Residential Demolition404
- Industrial New Construction254
- Multifamily Alteration127
- ADU-Qualifying Construction
- Civic Construction
- Commercial MEP
- Commercial Pool Construction
- Commercial Shell-Only Construction
- Commercial Signage Permits
- Residential Alteration
- Residential Foundation-Only
- Residential MEP
- Residential New (Single-Family)
- Temporary Construction Support
Commercial Alteration in other metros
FAQ
Frequently asked about commercial alteration permits in Seattle
- How many commercial alteration permits are pulled in Seattle each year?
- 41,267 commercial alteration permits are currently indexed for Seattle. Volume varies year over year; PermitCore tracks both historical totals and current rolling-window activity.
- Where can I see the latest commercial alteration permits in Seattle?
- The grid above shows the most recent commercial alteration permits in Seattle, paginated 25 per page. For programmatic access — filter by cohort, by date range, by contractor — use the PermitCore API or download via the sandbox.
- How is the commercial alteration data in Seattle refreshed?
- Seattle permit data is refreshed daily from the city's open-data portal. Cohort classification is applied automatically via PermitCore's LLM-1 classifier; field-level data-quality flags surface inline so you can filter for clean rows.
- Can I export Seattle commercial alteration permits?
- Yes — the free tier includes 5K rows of CSV export per month. Paid tiers expand to Parquet export, 50K-2M rows, and webhook delivery on new commercial alteration permit filings.
Custom delivery
Want Commercial Alteration in Seattle permit data delivered to your CRM or warehouse?
Self-serve API tiers cover most use cases. If you need direct delivery to Salesforce, HubSpot, Snowflake, BigQuery, or a custom warehouse — tell us the shape and we'll scope a path. Replies within one business day.