# Building permits at 506 20th Ave, Seattle, WA Four permits on record here. The newest, Jun 16: Establish use as two attached dwelling units per Land Use Code. Within a quarter mile, the city has issued 5 more permits since May 1. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Jun 16, 2026 | New building | Establish use as two attached dwelling units per Land Use Code. Construct new two family dwelling per plan. | $512,878 | [7104413-CN](https://nearbypermits.com/seattle/permit/7104413-CN/) | | Jan 6, 2026 | Alteration or repair | Alterations to existing duplex subject to field inspection (STFI) | $28,500 | [7122227-CN](https://nearbypermits.com/seattle/permit/7122227-CN/) | | Dec 16, 2025 | Alteration or repair | Construct interior and exterior alterations to existing Multi-family structure per STFI | $28,500 | [7121543-CN](https://nearbypermits.com/seattle/permit/7121543-CN/) | | Dec 10, 2015 | Alteration or repair | Construct interior alterations to existing single family dwelling per (STFI) | $50,000 | [6508987-CN](https://nearbypermits.com/seattle/permit/6508987-CN/) | ## Within ¼ mi since May 1, 2026 5 permits in the circle. From our copy of the city's data (last 24 months). ### This block (250 to 1,000 ft), 4 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 10, 2026 | [536 19th Ave](https://nearbypermits.com/seattle/address/536-19th-ave/) | 420 ft NW | Addition | Construct deck addition for one family dwelling subject to field inspection STFI. | $7,000 | [7161728-CN](https://nearbypermits.com/seattle/permit/7161728-CN/) | | Aug 18, 2026 | [2210 E Cherry St](https://nearbypermits.com/seattle/address/2210-e-cherry-st/) | 960 ft NE | Alteration or repair | Construct initial tenant improvement in street level space for a canine grooming facility occupy per plans | $90,000 | [7147882-CN](https://nearbypermits.com/seattle/permit/7147882-CN/) | | Aug 3, 2026 | [706 20th Ave](https://nearbypermits.com/seattle/address/706-20th-ave/) | 670 ft N | Alteration or repair | Construct alterations for fire damage repair to remove damaged dropped ceilings finishes and windows in kind subject to field inspection (STFI). | $75,000 | [7154710-CN](https://nearbypermits.com/seattle/permit/7154710-CN/) | | Jul 22, 2026 | [2101 E James St](https://nearbypermits.com/seattle/address/2101-e-james-st/) | 380 ft NE | Roofing | Reroof of Both Steep Slope and low slope areas:1. Steep Slope; remove and replace in like kind asphalt shingle roofing. Remove existing asphalt shingle roofing and dispose of properly. Install New Certainteed Landmark Asphalt shingle roofing system underlayment new edge metal and flashing all per ma | $94,245 | [7154389-RR](https://nearbypermits.com/seattle/permit/7154389-RR/) | ### Farther (1,000 ft to ¼ mi), 1 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Jun 23, 2026 | [800 18th Ave](https://nearbypermits.com/seattle/address/800-18th-ave/) | 0.24 mi NW | Alteration or repair | Construct alterations for building stabilization (Immaculate Conception Church) at east end of ground floor in existing institutional building per plan. | $175,000 | [7138441-CN](https://nearbypermits.com/seattle/permit/7138441-CN/) | ## More on this street Other addresses on 20th Ave with permits, nearest house number first: - [504 20th Ave](https://nearbypermits.com/seattle/address/504-20th-ave/): newest permit Mar 12, 2026 - [401 20th Ave](https://nearbypermits.com/seattle/address/401-20th-ave/): newest permit Mar 31, 2026 - [308 20th Ave](https://nearbypermits.com/seattle/address/308-20th-ave/): newest permit Jun 18, 2025 - [706 20th Ave](https://nearbypermits.com/seattle/address/706-20th-ave/): newest permit Aug 3, 2026 - [823 20th Ave](https://nearbypermits.com/seattle/address/823-20th-ave/): newest permit Oct 1, 2025 - [925 20th Ave](https://nearbypermits.com/seattle/address/925-20th-ave/): newest permit Oct 13, 2025 - [941 20th Ave](https://nearbypermits.com/seattle/address/941-20th-ave/): newest permit Sep 2, 2025 - [1452 20th Ave](https://nearbypermits.com/seattle/address/1452-20th-ave/): newest permit Dec 17, 2025 - [1455 20th Ave](https://nearbypermits.com/seattle/address/1455-20th-ave/): newest permit Jul 16, 2025 - [1463 20th Ave](https://nearbypermits.com/seattle/address/1463-20th-ave/): newest permit Jun 12, 2025 --- Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr), City of Seattle. Checked 2026-10-08 10:45 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ Map, all 4 permits at this address and 5 nearby: https://nearbypermits.com/seattle/address/506-20th-ave/