# Building permits at 170 Prospect St, Seattle, WA Three permits on record here. The newest, Aug 14: Construct substantial alterations to one-family dwelling. Within a quarter mile, the city has issued 6 more permits since May 1. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Aug 14, 2026 | Alteration or repair | Construct substantial alterations to one-family dwelling per plan. | $250,000 | [7150531-CN](https://nearbypermits.com/seattle/permit/7150531-CN/) | | Aug 16, 2025 | Alteration or repair | Construct alterations to one-family dwelling subject to field inspection (STFI). | $250,000 | [7101174-CN](https://nearbypermits.com/seattle/permit/7101174-CN/) | | Jun 12, 2007 | Alteration or repair | Closed as Incomplete - Expired Permit Remodel master suite on second floor of existing single family residence per STFI. | $4,000 | [6142823-CN](https://nearbypermits.com/seattle/permit/6142823-CN/) | ## Within ¼ mi since May 1, 2026 6 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 | |---|---|---|---|---|---|---| | Jun 30, 2026 | [1400 2nd Ave N](https://nearbypermits.com/seattle/address/1400-2nd-ave-n/) | 720 ft N | Alteration or repair | Construct non structural interior alterations to condo unit 292 subject to field inspection STFI. | $60,000 | [7150474-CN](https://nearbypermits.com/seattle/permit/7150474-CN/) | | Jun 29, 2026 | [1403 2nd Ave N](https://nearbypermits.com/seattle/address/1403-2nd-ave-n/) | 730 ft N | Alteration or repair | Voluntary seismic retrofit upgrade to basement of SFR per engineered plan set STFI | $3,500 | [7150390-CN](https://nearbypermits.com/seattle/permit/7150390-CN/) | ### Farther (1,000 ft to ¼ mi), 4 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 1, 2026 | [22 W Highland Dr](https://nearbypermits.com/seattle/address/22-w-highland-dr/) | 0.21 mi W | Roofing | Remove existing asphalt shingles down to the existing roof substrate remove all membrane replace damaged plywood as needed. On steep slope we will install underlayment ice and water shield and shingles. On the low slope sections we will install 1/2" densdeck coverboard and 60mil TPO membrane | $173,000 | [7160867-RR](https://nearbypermits.com/seattle/permit/7160867-RR/) | | May 26, 2026 | [1240 Bigelow Ave N](https://nearbypermits.com/seattle/address/1240-bigelow-ave-n/) | 0.19 mi NE | Alteration or repair | Construct alterations to existing one-family home per plan | $56,036 | [7130586-CN](https://nearbypermits.com/seattle/permit/7130586-CN/) | | May 5, 2026 | [1003 5th Ave N](https://nearbypermits.com/seattle/address/1003-5th-ave-n/) | 0.24 mi E | Fence, wall or deck | Construct alterations to existing deck per STFI | $2,500 | [7141485-CN](https://nearbypermits.com/seattle/permit/7141485-CN/) | | May 4, 2026 | [8 W Aloha St](https://nearbypermits.com/seattle/address/8-w-aloha-st/) | 0.22 mi SW | Roofing | Tear off and replace existing waterproofing on a 618 sq ft courtyard deck. Install new 2-ply SBS-modified bitumen waterproofing assembly over concrete substrate including asphaltic primer Elastophene 3.0 vapor barrier retrofit drains tapered insulation SOPRASMART cover board and torch-applied SBS ca | $76,974 | [7141313-RR](https://nearbypermits.com/seattle/permit/7141313-RR/) | ## More on this street Other addresses on Prospect St with permits, nearest house number first: - [19 Prospect St](https://nearbypermits.com/seattle/address/19-prospect-st/): newest permit Feb 4, 2025 --- Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr), City of Seattle. Checked 2026-10-07 11:51 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ Map, all 3 permits at this address and 6 nearby: https://nearbypermits.com/seattle/address/170-prospect-st/