# Building permits at 1018 Seneca St, Seattle, WA Six permits on record here. The newest, Oct 23, 2025: Alterations to existing minor telecommunications facilities (AT&T) at ground level and at roof of multifamily. Within a quarter mile, the city has issued 20 more permits (18 projects) since May 1. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Oct 23, 2025 | Alteration or repair | Alterations to existing minor telecommunications facilities (AT&T) at ground level and at roof of multifamily building per plan. | $40,000 | [7088352-CN](https://nearbypermits.com/seattle/permit/7088352-CN/) | | Jun 6, 2022 | Alteration or repair | Construct alterations to existing multifamily building at the rooftop for minor telecommunication antenna facility (T-Mobile) per plan. | $35,000 | [6861701-CN](https://nearbypermits.com/seattle/permit/6861701-CN/) | | Oct 20, 2020 | Alteration or repair | Construct alterations to existing multifamily building at the rooftop for minor telecommunication antenna facility per plan. | $25,000 | [6792850-CN](https://nearbypermits.com/seattle/permit/6792850-CN/) | | Mar 29, 2016 | Alteration or repair | Construct alterations to an existing commercial building at the rooftop level minor communications antenna facility (AT&T) and at grade level equipment area per plan. | $50,000 | [6512811-CN](https://nearbypermits.com/seattle/permit/6512811-CN/) | | Dec 27, 2012 | Alteration or repair | Construct alterations to existing multifamily structure for expansion of an existing minor telecommunications utility equipment at the north courtyard/per plan. | $10,000 | [6320304-CN](https://nearbypermits.com/seattle/permit/6320304-CN/) | | May 7, 2012 | Other | Expand existing minor telecommunications utility (AT&T) consisting of three panel antennas on the rooftop of an existing multi-family residence per plan. | $15,000 | [6276474-CN](https://nearbypermits.com/seattle/permit/6276474-CN/) | ## Within ¼ mi since May 1, 2026 20 permits in the circle. From our copy of the city's data (last 24 months). ### Next door (under 250 ft), 1 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Jun 2, 2026 | [1020 Seneca St](https://nearbypermits.com/seattle/address/1020-seneca-st/) | under 10 ft | Alteration or repair | Construct voluntary seismic retrofit (alternate method) to existing multifamily building (John Winthrop Apartments) per plan. | $824,397 | [7126099-CN](https://nearbypermits.com/seattle/permit/7126099-CN/) | ### This block (250 to 1,000 ft), 4 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 18, 2026 | [1310 Minor Ave](https://nearbypermits.com/seattle/address/1310-minor-ave/) | 720 ft N | Alteration or repair | Construct alterations to existing mixed use building on levels 1-5 per plan. | $92,500 | [7120882-CN](https://nearbypermits.com/seattle/permit/7120882-CN/) | | Sep 8, 2026 | [903 Union St](https://nearbypermits.com/seattle/address/903-union-st/) | 780 ft W | Roofing | Remove old modified bitumen roof and replae with new Certainteed SBS roof membrane system. Specification :SBS-C-2-T | $449,966 | [7161721-RR](https://nearbypermits.com/seattle/permit/7161721-RR/) | | Jul 1, 2026 | [1300 University St](https://nearbypermits.com/seattle/address/1300-university-st/) | 880 ft NE | Alteration or repair | Construct repairs in kind to existing multi-family building subject to field inspection (STFI). | $20,000 | [7148750-CN](https://nearbypermits.com/seattle/permit/7148750-CN/) | | Jun 9, 2026 | [900 University St](https://nearbypermits.com/seattle/address/900-university-st/) | 600 ft W | Alteration or repair | Construct interior alterations in residential building on level 1 for a cafe (Horizon House) occupy per plan. | $300,000 | [6962853-CN](https://nearbypermits.com/seattle/permit/6962853-CN/) | ### Farther (1,000 ft to ¼ mi), 15 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 30, 2026 | [800 Union St](https://nearbypermits.com/seattle/address/800-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to the Consulate General of Japan in Seattle on the tenth floor of existing commercial building per plan. | $18,000 | [7160064-BK](https://nearbypermits.com/seattle/permit/7160064-BK/) | | Sep 23, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Snell & Wilmer on the 37th floor of existing commercial building per plan. | $64,000 | [7163264-BK](https://nearbypermits.com/seattle/permit/7163264-BK/) | | Sep 23, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Snell & Wilmer on the 37th floor of existing commercial building per plan. | $206,000 | [7163258-BK](https://nearbypermits.com/seattle/permit/7163258-BK/) | | Sep 15, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Avenue5 Residential on the 50th floor of existing commercial building per plan. | $1,107,000 | [7160931-BK](https://nearbypermits.com/seattle/permit/7160931-BK/) | | Aug 14, 2026 | [604 E Union St](https://nearbypermits.com/seattle/address/604-e-union-st/) | 0.21 mi NE | Fence, wall or deck | We are performing a single-ply membrane overlay onto the existing BUR on wood deck. The membrane will be in-seam fastened over a geotextile fabric separation layer per manufacturer warranty requirements | $189,286 | [7158177-RR](https://nearbypermits.com/seattle/permit/7158177-RR/) | | Aug 13, 2026 | [800 Union St](https://nearbypermits.com/seattle/address/800-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Oppenheimer & Co. Inc. on the 21st floor of existing commercial building per plan. | $280,000 | [7145954-BK](https://nearbypermits.com/seattle/permit/7145954-BK/) | | Aug 13, 2026 | [800 Union St](https://nearbypermits.com/seattle/address/800-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Oppenheimer & Co. Inc. on the 21st floor of existing commercial building per plan. | $45,000 | [7145949-BK](https://nearbypermits.com/seattle/permit/7145949-BK/) | | Aug 13, 2026 | [1301 Madison St](https://nearbypermits.com/seattle/address/1301-madison-st/) | 0.22 mi E | Alteration or repair | Change of use to medical services per land use code. Construct alterations including removal of mezzanine and stairs for physical therapy office on first floor and occupy per plan. | $150,000 | [7131165-CN](https://nearbypermits.com/seattle/permit/7131165-CN/) | | Aug 7, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Kilpatrick Townsend on the 41st floor of existing commercial building per plan. | $1,535,000 | [7154032-BK](https://nearbypermits.com/seattle/permit/7154032-BK/) | | Aug 7, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to JLL on the 28th floor of existing commercial building per plan. | $977,000 | [7151762-BK](https://nearbypermits.com/seattle/permit/7151762-BK/) | | Aug 4, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Washington Holdings on the 41st floor of existing commercial building per plan. | $183,000 | [7151763-BK](https://nearbypermits.com/seattle/permit/7151763-BK/) | | Jul 27, 2026 | [601 Union St](https://nearbypermits.com/seattle/address/601-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Puget Sound Clean Air Agency on parking level B of existing commercial building per plan. | $15,000 | [7154701-BK](https://nearbypermits.com/seattle/permit/7154701-BK/) | | Jul 23, 2026 | [800 Union St](https://nearbypermits.com/seattle/address/800-union-st/) | 0.24 mi W | Alteration or repair | Construct blanket permit tenant improvements to Mutual of Enumclaw on the 11th floor of existing commercial building per plan. | $100,000 | [7145725-BK](https://nearbypermits.com/seattle/permit/7145725-BK/) | | Jun 4, 2026 | [802 Terry Ave](https://nearbypermits.com/seattle/address/802-terry-ave/) | 0.23 mi SE | Alteration or repair | Construct interior alterations for concession area at 1st floor of existing institution (O'Dea High School) and occupy per plan. | $200,000 | [7129340-CN](https://nearbypermits.com/seattle/permit/7129340-CN/) | | May 6, 2026 | [1200 Boylston Ave](https://nearbypermits.com/seattle/address/1200-boylston-ave/) | 0.22 mi NE | Fence, wall or deck | Scope of work includes replacement of ground level perimeter guardrails topping slab repairs and new pedestrian traffic coating at the ground level terrace and replacement of topping slab and hot rubberized waterproofing membrane at the ground level parking area. Additionally there will be some targ | $700,000 | [7101619-CN](https://nearbypermits.com/seattle/permit/7101619-CN/) | ## Zoning requests nearby There are no zoning requests on file within ¼ mi. Seattle's feed was last read Oct 8. ## More on this street Other addresses on Seneca St with permits, nearest house number first: - [1020 Seneca St](https://nearbypermits.com/seattle/address/1020-seneca-st/): newest permit Jun 2, 2026 - [925 Seneca St](https://nearbypermits.com/seattle/address/925-seneca-st/): newest permit Jul 10, 2025 - [1321 Seneca St](https://nearbypermits.com/seattle/address/1321-seneca-st/): newest permit Apr 30, 2026 --- Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr), City of Seattle. Checked 2026-10-08 21:55 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ Zoning requests come from the Seattle land use permits (https://cos-data.seattle.gov/d/ht3q-kdvx), City of Seattle. We read it Oct 8, 17:47 UTC. Map, all 6 permits at this address and 20 nearby: https://nearbypermits.com/seattle/address/1018-seneca-st/