Seattle building & ADU permits
Recent permit activity, updated continuously.
1013
Permits tracked
330
ADU permits
24
Distinct ZIP codes
Jun 18, 2026
Newest permit
Recent permits
A sample of the freshest permits in this jurisdiction — ZIP and city only (no street addresses).
| ZIP | Permit type | ADU type | Valuation | Applied |
|---|---|---|---|---|
| 98144 | Residential | — | $663,362 | Nov 3, 2023 |
| 98119 | Commercial | — | $320,220 | Aug 5, 2025 |
| 98133 | Residential | — | $204,733 | Dec 31, 2025 |
| 98106 | Residential | Detached ADU | $163,190 | Jul 26, 2025 |
| 98146 | Residential | Detached ADU | $598,010 | Jul 18, 2025 |
| 98146 | Residential | Detached ADU | $55,514 | Jul 18, 2025 |
| 98105 | Residential | — | $56,000 | Apr 22, 2026 |
| 98106 | Residential | Detached ADU | $565,164 | Jul 26, 2025 |
| 98117 | Residential | — | $455,687 | Jan 30, 2025 |
| 98115 | Residential | — | $561,104 | Nov 10, 2025 |
| 98117 | Residential | — | $800,691 | Sep 25, 2024 |
| 98117 | Residential | — | $659,669 | Jan 28, 2025 |
| 98103 | Residential | — | $40,000 | Jun 15, 2026 |
| 98117 | Residential | — | $845,400 | Jan 30, 2025 |
| 98105 | Residential | — | $967,533 | Mar 13, 2026 |
| 98122 | Residential | — | $512,878 | Dec 15, 2025 |
| 98118 | Residential | — | $421,166 | Mar 17, 2026 |
| 98118 | Residential | — | $221,369 | Nov 28, 2025 |
| 98118 | Residential | — | $472,618 | Jan 16, 2026 |
| 98112 | Residential | — | $470,039 | Feb 12, 2026 |
Top ZIP codes by recent activity
ADU types in the recent set
Housing law — Washington
Washington's HB 1337 (2023) requires cities to allow at least two ADUs per lot in urban growth areas, bans owner-occupancy requirements, and limits parking and impact fees.
HB 1110 (2023) ends single-family-only zoning in larger cities, requiring duplex-to-sixplex middle housing scaled by city size, with Puget Sound cities phasing in compliance from 2025.
Data source
Sourced from data.seattle.gov (Socrata). Public Domain.
Nearby cities — Washington
Seattle permit data — FAQ
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Informational only, not legal advice. Headline counts reflect all permits Igni has tracked for this jurisdiction; the table shows recent activity. Housing law changes — verify current statutes before relying on this.