600 4th Ave
Building permits, Seattle, WA 98104
600 4th Ave, Seattle has 17 building permits on record. The most recent, issued Jun 12, 2026, is for alteration or repair: Construct exterior alterations to City Hall per plan.
All permits at this address
| Date | Type | Work | Cost |
|---|---|---|---|
| Alteration or repair | Construct exterior alterations to City Hall per plan. | $3,500,000 | |
| Mechanical (HVAC) | Construct tenant improvements to existing commercial building at the 2nd floor (Seattle City Hall) per plan. Mechanical included. | $180,000 | |
| Addition | Construct alterations to remove repair and replace waterproofing topping slab and paving slab NE accessible ramp and flagpole addition at City Hall Plaza per plan. | $6,000,000 | |
| Alteration or repair | Construct alterations to existing commercial building (Seattle City Hall) at penthouse per plan. | $50,000 | |
| Alteration or repair | Construct alterations for an emergency shelter in a portion of Seattle City Hall occupy per plans. | $2,000 | |
| Alteration or repair | Interior alterations to Seattle City Hall 5th Floor subject to field inspection (STFI). | $250,000 | |
| Alteration or repair | Interior alterations to the Office of Intergovernmental Relations subject to field inspection (STFI). | $80,000 | |
| Alteration or repair | Construct tenant improvements to Seattle City Hall on the 7th floor subject to field inspection (STFI) | $217,079 | |
| Alteration or repair | Construct interior alterations to existing tenant improvement 6th floor subject to field inspection (STFI.) | $27,243 | |
| Alteration or repair | Construct tenant improvements on the 4th story in an existing commercial building per plans. | $250,000 | |
| Alteration or repair | Construct interior alterations to offices at northeast corner of fourth floor in existing commercial building subject to field inspection (STFI) | $35,000 | |
| Alteration or repair | Tenant improvements to portion of 4th floor offices per floor plan subject to field inspection. | $35,000 | |
| Alteration or repair | Change of Use from retail to restaurant plaza level NW Corner of Seattle City Hall and occupy per plan. | $160,000 | |
| Alteration or repair | Tenant improvement (non-structural)to existing unoccupied retail space. New dimising walls windows and doors (gound level corner of 4th ave and Cherry St.) Subject to field… | $33,000 | |
| Alteration or repair | Construct non structural tenant improvements to existing administrative office per plan subject to field inspection | $27,989 | |
| Alteration or repair | Closed as Incomplete - Expired Permit Tenant improvement to existing unoccupied retail space room 205 (ground level of corner of 4th Ave and Cherry St) subject to field inspection. | $4,000 | |
| Alteration or repair | interior alterations at the 4th ave level G2 of Seattle City Hall for intermittent use homeless shelter and minor alts. to adjacent spaces all per plans. | $130,000 |
Seattle Department of Construction and Inspections last updated its data Oct 2, 2026. We checked it 2026-10-02 02:28 UTC. Official data.