401 20th Ave
Building permits, Seattle, WA
401 20th Ave, Seattle has 2 building permits on record. The most recent, issued Mar 31, 2026, is for addition or alteration: Construct alterations to basement level of a single-family residence subject to field inspection (STFI)
All permits at this address
| Date | Type | Work | Cost |
|---|---|---|---|
| Addition or alteration | Construct alterations to basement level of a single-family residence subject to field inspection (STFI) | $82,000 | |
| Addition or alteration | Construct additions and alterations to existing single family residence per plan. | $168,253 |
Checked 2026-10-01 10:53 UTC against Seattle Department of Construction and Inspections permit data. Markdown · JSON