# Building permits at 509 21st Ave E, Seattle, WA

One permit on record here. The newest, Jun 16: Construct addition and alterations to a single-family residence. Within a quarter mile, the city has issued 9 more permits since May 1. One is for a new building, 0.21 mi away.

## At this address

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Jun 16, 2026 | Addition | Construct addition and alterations to a single-family residence per plans | $200,000 | [7118598-CN](https://nearbypermits.com/seattle/permit/7118598-CN/) |

## Within ¼ mi since May 1, 2026

9 permits in the circle. From our copy of the city's data (last 24 months).

### This block (250 to 1,000 ft), 2 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Jul 29, 2026 | [606 19th Ave E](https://nearbypermits.com/seattle/address/606-19th-ave-e/) | 650 ft NW | Alteration or repair | Construct tenant improvements (non-structural alterations) for apartments (The Park Apartments) at 2nd and 3rd floors of existing mixed-use apartment building per plan. | $250,000 | [7115510-CN](https://nearbypermits.com/seattle/permit/7115510-CN/) |
| May 22, 2026 | [611 22nd Ave E](https://nearbypermits.com/seattle/address/611-22nd-ave-e/) | 530 ft NE | Alteration or repair | Construct alterations to one-family dwelling subject to field inspection (STFI) | $15,000 | [7144263-CN](https://nearbypermits.com/seattle/permit/7144263-CN/) |

### Farther (1,000 ft to ¼ mi), 7 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | [2310 E Valley St](https://nearbypermits.com/seattle/address/2310-e-valley-st/) | 0.24 mi NE | Addition | Construct alterations and addition for one-family dwelling per plan. | $239,422 | [7126109-CN](https://nearbypermits.com/seattle/permit/7126109-CN/) |
| Sep 18, 2026 | [722 19th Ave E](https://nearbypermits.com/seattle/address/722-19th-ave-e/) | 0.19 mi NW | Alteration or repair | Construct interior alterations to one family dwelling subject to field inspection STFI. | $1,000 | [7154480-CN](https://nearbypermits.com/seattle/permit/7154480-CN/) |
| Aug 12, 2026 | [610 17th Ave E](https://nearbypermits.com/seattle/address/610-17th-ave-e/) | 0.24 mi NW | Alteration or repair | Construct alterations to portions of a one-family dwelling subject-to-field inspection (STFI). | $300,000 | [7156556-CN](https://nearbypermits.com/seattle/permit/7156556-CN/) |
| Jun 30, 2026 | [803 24th Ave E](https://nearbypermits.com/seattle/address/803-24th-ave-e/) | 0.24 mi NE | Fence, wall or deck | Construct new retaining wall to replace existing wall adjacent to existing one family dwelling per plan. | $120,000 | [7134328-CN](https://nearbypermits.com/seattle/permit/7134328-CN/) |
| Jun 23, 2026 | [229 24th Ave E](https://nearbypermits.com/seattle/address/229-24th-ave-e/) | 0.23 mi SE | Alteration or repair | Construct alterations to dormer at upper level of one-family dwelling subject to field inspection (STFI) | $10,000 | [7149349-CN](https://nearbypermits.com/seattle/permit/7149349-CN/) |
| Jun 23, 2026 | [709 24th Ave E](https://nearbypermits.com/seattle/address/709-24th-ave-e/) | 0.21 mi NE | New building | Allow housing for one new detached dwelling unit per land use code. Existing detached dwelling to remain. Construct one-family dwelling per plan. | $237,960 | [7117751-CN](https://nearbypermits.com/seattle/permit/7117751-CN/) |
| Jun 2, 2026 | [318 18th Ave E](https://nearbypermits.com/seattle/address/318-18th-ave-e/) | 0.24 mi SW | Alteration or repair | Construct alterations to existing one-family dwelling subject-to-field inspection (STFI). | $70,000 | [7145744-CN](https://nearbypermits.com/seattle/permit/7145744-CN/) |

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Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr). Checked 2026-10-06 04:11 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Map, the one permit at this address and 9 nearby: https://nearbypermits.com/seattle/address/509-21st-ave-e/