# Building permits at 409 18th Ave E, Seattle, WA

409 18th Ave E, Seattle has 2 building permits on record. The most recent, issued Feb 10, 2026, is for roofing: Residential reroof only; no structural changes. Remove existing shingles. No plywood replacement planned but if needed we will replace with 1/2" CDX. Install Owens Corning Duration…

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Feb 10, 2026 | Roofing | Residential reroof only; no structural changes. Remove existing shingles. No plywood replacement planned but if needed we will replace with 1/2" CDX. Install Owens Corning Duration shingles. | $21,280 | [7128710-RR](https://nearbypermits.com/seattle/permit/7128710-RR/) |
| Nov 10, 2005 | Addition | Closed as Incomplete - Expired Permit Construct 1-story addition with roof-top deck deck addition and alterations throughout existing single family residence and create accessory dwelling unit in basement per plan. | $75,000 | [6076137-CN](https://nearbypermits.com/seattle/permit/6076137-CN/) |

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Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr). Checked 2026-10-01 17:16 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/