# Building permits at 100 4th Ave N, Seattle, WA The biggest project within a quarter mile since May 1: a $15M alteration or repair at 370 Thomas St, permitted Jun 29. 36 permits on record here. The newest, Feb 4: Construct temporary telecommunications facility (Verizon Wireless) on rooftop of existing commercial building. Within a quarter mile, the city has issued 8 more permits since May 1. One is for a new building, 720 ft away. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Feb 4, 2026 | Alteration or repair | Construct temporary telecommunications facility (Verizon Wireless) on rooftop of existing commercial building [Event Date - 2/11/2026; Removal Date - 2/15/2026] per plan | Not listed | [7126501-CN](https://nearbypermits.com/seattle/permit/7126501-CN/) | | Jun 23, 2025 | Alteration or repair | Remove and replace mechanical equipment on second floor and roof of commercial building per plan. | $1,000,000 | [7065639-CN](https://nearbypermits.com/seattle/permit/7065639-CN/) | | Jun 13, 2024 | Alteration or repair | Construct alterations to mail room of existing office space subject to field inspection STFI. | $50,000 | [7030077-CN](https://nearbypermits.com/seattle/permit/7030077-CN/) | | Feb 16, 2024 | Alteration or repair | Construct blanket permit tenant improvements to future tenant on the second floor of existing commercial building per plan. | $164,858 | [6995998-BK](https://nearbypermits.com/seattle/permit/6995998-BK/) | | Sep 29, 2023 | Alteration or repair | Establish use as Sales and services general (bank). Construct tenant improvements (Wells Fargo Bank) to existing commercial office building (Komo Plaza) at the ground floor level occupy per plan. Mechanical is included. | $354,025 | [6948822-CN](https://nearbypermits.com/seattle/permit/6948822-CN/) | | Feb 9, 2016 | Alteration or repair | Tenant improvements to the NE portion of the south building subject to field inspection (STFI). | $25,000 | [6518132-CN](https://nearbypermits.com/seattle/permit/6518132-CN/) | | Jan 28, 2016 | Alteration or repair | Blanket Permit for interior non-structural alterations. Tenant improvement for Tierpoint in the 3rd floor of KOMO Plaza per plan. | Not listed | [6508041-BK](https://nearbypermits.com/seattle/permit/6508041-BK/) | | Jul 14, 2015 | Alteration or repair | Alterations to suite 150 in existing commercial building and change use from restaurant to car rental and occupy per plan. | $8,000 | [6471830-CN](https://nearbypermits.com/seattle/permit/6471830-CN/) | | Jan 7, 2015 | Alteration or repair | Blanket Permit for interior non-structural alterations to Floor 5 for Sinclair digital. | Not listed | [6436542-BK](https://nearbypermits.com/seattle/permit/6436542-BK/) | | Jul 24, 2013 | Alteration or repair | Alteration to construct data center on 6th level(Cequel Data Center) of existing commercial office building per plan | $620,000 | [6360368-CN](https://nearbypermits.com/seattle/permit/6360368-CN/) | | Jun 3, 2013 | Alteration or repair | Construct interior non-structural alterations to plaza level of existing office tenant space (First Citizens Bank) per floor plan and subject to field inspection STFI. | $50,000 | [6368015-CN](https://nearbypermits.com/seattle/permit/6368015-CN/) | | Nov 29, 2010 | Alteration or repair | Alter portion of west P3 (Fire Doors and Penetrations) per plan | $112,500 | [6255671-CN](https://nearbypermits.com/seattle/permit/6255671-CN/) | | Aug 20, 2010 | Alteration or repair | Tenent improvements for server cabinets to portion of 3rd floor per plan | $33,000 | [6252691-CN](https://nearbypermits.com/seattle/permit/6252691-CN/) | | Jul 26, 2010 | Alteration or repair | Blanket Permit for interior non-structural alterations to ADhost Internet floor 3. | Not listed | [6254795-BK](https://nearbypermits.com/seattle/permit/6254795-BK/) | | Feb 24, 2010 | New building | Remove and reconstruct CMU wall for mechanical room garage level P3 in existing comm bldg (Fisher Plaza West Bldg) per plan / STFI | $15,000 | [6241640-CN](https://nearbypermits.com/seattle/permit/6241640-CN/) | | Jan 5, 2010 | Alteration or repair | Blanket Permit for interior non-structural alterations for Fisher Communications floors 3-5 | Not listed | [6236039-BK](https://nearbypermits.com/seattle/permit/6236039-BK/) | | Sep 2, 2009 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 4th floor. (Guestware) per plans. | Not listed | [6225264-BK](https://nearbypermits.com/seattle/permit/6225264-BK/) | | Aug 28, 2009 | Addition | Interior & exterior structural upgrade to support 2nd floor work & structural addition to support (3) cooling tower & (1) pump on existing roof per plan. | $918,600 | [6219064-CN](https://nearbypermits.com/seattle/permit/6219064-CN/) | | Aug 11, 2008 | Alteration or repair | Structural support and lateral bracing for computer room equipment in existing computer room suite 420 per plan. | $25,000 | [6185750-CN](https://nearbypermits.com/seattle/permit/6185750-CN/) | | Jul 7, 2008 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 4th floor. Amazon.com | Not listed | [6184973-BK](https://nearbypermits.com/seattle/permit/6184973-BK/) | | Apr 9, 2008 | Alteration or repair | Blanket Permit for plaza floor interior non-structural alterations. | Not listed | [6175035-BK](https://nearbypermits.com/seattle/permit/6175035-BK/) | | Jan 10, 2008 | Alteration or repair | Blanket Permit for interior non-structural for the 3rd floor. Egis real estate | Not listed | [6165553-BK](https://nearbypermits.com/seattle/permit/6165553-BK/) | | Jan 10, 2008 | Alteration or repair | Construct alterations to service entrance door of P3 elevator lobby door per plan. | $7,000 | [6164371-CN](https://nearbypermits.com/seattle/permit/6164371-CN/) | | Dec 18, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 3rd floor. Interactive media | Not listed | [6161678-BK](https://nearbypermits.com/seattle/permit/6161678-BK/) | | Oct 3, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 4th floor. | Not listed | [6154798-BK](https://nearbypermits.com/seattle/permit/6154798-BK/) | | Sep 18, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 4th floor. | Not listed | [6152723-BK](https://nearbypermits.com/seattle/permit/6152723-BK/) | | Jul 27, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 2nd floor. Internap | Not listed | [6146687-BK](https://nearbypermits.com/seattle/permit/6146687-BK/) | | Feb 13, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations for the 6th floor. Bio- neuronics | Not listed | [6127029-BK](https://nearbypermits.com/seattle/permit/6127029-BK/) | | Jan 10, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations for the 3rd floor Adhost Internet. | Not listed | [6123212-BK](https://nearbypermits.com/seattle/permit/6123212-BK/) | | Jan 5, 2007 | Alteration or repair | Blanket Permit for interior non-structural alterations for the 3rd floor. Princess cruises data center | Not listed | [6123639-BK](https://nearbypermits.com/seattle/permit/6123639-BK/) | | Aug 7, 2006 | Alteration or repair | Blanket Permit for interior non-structural alterations to the plaza-NW Orthopaedics. | Not listed | [6104034-BK](https://nearbypermits.com/seattle/permit/6104034-BK/) | | Jun 26, 2006 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 2nd floor Swedish Health Services | Not listed | [6093777-BK](https://nearbypermits.com/seattle/permit/6093777-BK/) | | May 15, 2006 | Alteration or repair | Comm TI / Construct 6 375 sq ft of data center space on the 3rd floor of existing Fisher Plaza West Building per plan (with structural work) | $992,052 | [6092596-CN](https://nearbypermits.com/seattle/permit/6092596-CN/) | | Jan 9, 2006 | Alteration or repair | Blanket Permit for interior non-structural alterations to the 6th floor. For Big Fish Games. (Intial TI for this space so lower fees apply based on SF.- DAT 12/14/05) | Not listed | [6079885-BK](https://nearbypermits.com/seattle/permit/6079885-BK/) | | Aug 18, 2005 | Alteration or repair | Blanket Permit for interior non-structural alterations to floor 6 - Big Fish Games | Not listed | [6067251-BK](https://nearbypermits.com/seattle/permit/6067251-BK/) | | Jul 22, 2005 | Alteration or repair | Blanket Permit for interior non-structural alterations at the Plaza Level for Fisher Plaza SOS. | Not listed | [6066831-BK](https://nearbypermits.com/seattle/permit/6066831-BK/) | ## Within ¼ mi since May 1, 2026 8 permits in the circle. From our copy of the city's data (last 24 months). ### This block (250 to 1,000 ft), 6 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 16, 2026 | [335 Thomas St](https://nearbypermits.com/seattle/address/335-thomas-st/) | 720 ft NW | New building | Install minor communication "small cell node" utility pole (Verizon) per plan. | $70,000 | [7148933-CN](https://nearbypermits.com/seattle/permit/7148933-CN/) | | Aug 10, 2026 | [200 Sue Bird Ct N](https://nearbypermits.com/seattle/address/200-sue-bird-ct-n/) | 660 ft W | Alteration or repair | Construct tenant improvements to concession area of IMAX theater per plan. Mechanical included this permit. | $148,415 | [7131196-CN](https://nearbypermits.com/seattle/permit/7131196-CN/) | | Jul 2, 2026 | [325 Denny Way](https://nearbypermits.com/seattle/address/325-denny-way/) | 400 ft SW | Demolition | Demolish existing commercial building per plan. | $500,000 | [7144578-DM](https://nearbypermits.com/seattle/permit/7144578-DM/) | | Jun 29, 2026 | [370 Thomas St](https://nearbypermits.com/seattle/address/370-thomas-st/) | 810 ft N | Alteration or repair | Construct alterations to renovate historic Seattle Center Monorail Station per plan. Mechanical work included this permit. | $15,000,000 | [7108199-CN](https://nearbypermits.com/seattle/permit/7108199-CN/) | | Jun 12, 2026 | [500 Wall St](https://nearbypermits.com/seattle/address/500-wall-st/) | 960 ft SE | Alteration or repair | Construct non-structural interior alterations to ground and 2nd level amenity spaces for mixed-use apartment building [SKYE AT BELLTOWN]. Mechanical included. | $560,829 | [7123032-CN](https://nearbypermits.com/seattle/permit/7123032-CN/) | | May 1, 2026 | [305 Harrison St](https://nearbypermits.com/seattle/address/305-harrison-st/) | 1,000 ft NW | Addition | Construct addition and alterations to institutional building (The Armory emergency generator vault and renewable energy improvements) per plan. Mechanical included. | $2,000,000 | [7094482-CN](https://nearbypermits.com/seattle/permit/7094482-CN/) | ### Farther (1,000 ft to ¼ mi), 2 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Aug 14, 2026 | [2401 4th Ave](https://nearbypermits.com/seattle/address/2401-4th-ave/) | 0.24 mi SE | Alteration or repair | Construct non-structural interior alterations to add commercial kitchen for food delivery business [GOPUFF] at ground level of commercial building [FOURTH & BATTERY BUILDING] per plan. | $100,000 | [7095151-CN](https://nearbypermits.com/seattle/permit/7095151-CN/) | | May 12, 2026 | [2510 6th Ave](https://nearbypermits.com/seattle/address/2510-6th-ave/) | 0.20 mi E | Alteration or repair | Construct repairs to fire damage single family residence per STFI | $7,463 | [7141275-CN](https://nearbypermits.com/seattle/permit/7141275-CN/) | ## Zoning requests nearby There are no zoning requests on file within ¼ mi. Seattle's feed was last read Oct 9. ## More on this street Other addresses on 4th Ave N with permits, nearest house number first: - [140 4th Ave N](https://nearbypermits.com/seattle/address/140-4th-ave-n/): newest permit Apr 20, 2026 - [800 4th Ave N](https://nearbypermits.com/seattle/address/800-4th-ave-n/): newest permit Jun 10, 2026 - [805 4th Ave N](https://nearbypermits.com/seattle/address/805-4th-ave-n/): newest permit Jul 7, 2026 - [909 4th Ave N](https://nearbypermits.com/seattle/address/909-4th-ave-n/): newest permit Dec 2, 2025 - [1505 4th Ave N](https://nearbypermits.com/seattle/address/1505-4th-ave-n/): newest permit Mar 11, 2025 - [1606 4th Ave N](https://nearbypermits.com/seattle/address/1606-4th-ave-n/): newest permit Jan 29, 2025 - [1613 4th Ave N](https://nearbypermits.com/seattle/address/1613-4th-ave-n/): newest permit Jul 30, 2025 - [1716 4th Ave N](https://nearbypermits.com/seattle/address/1716-4th-ave-n/): newest permit Sep 17, 2026 - [1722 4th Ave N](https://nearbypermits.com/seattle/address/1722-4th-ave-n/): newest permit Sep 28, 2026 - [1910 4th Ave N](https://nearbypermits.com/seattle/address/1910-4th-ave-n/): newest permit Jul 31, 2025 --- Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr), City of Seattle. Checked 2026-10-09 08:30 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 9, 06:48 UTC. Map, all 36 permits at this address and 8 nearby: https://nearbypermits.com/seattle/address/100-4th-ave-n/