4401 4th Ave S
Building permits, Seattle, WA
4401 4th Ave S, Seattle has 16 building permits on record. The most recent, issued Jun 11, 2026, is for addition or alteration: Construct tenant improvement to existing warehouse (Costco) per plan.
All permits at this address
| Date | Type | Work | Cost |
|---|---|---|---|
| Addition or alteration | Construct tenant improvement to existing warehouse (Costco) per plan. | $75,000 | |
| Addition or alteration | Commercial tenant improvements (Costco Wholesale) to existing commercial structure per plan. Mechanical is included. | $1,750,000 | |
| Addition or alteration | Construct tenant improvements to existing commercial building (Costco) per plan. Mechanical included. | $95,000 | |
| Addition or alteration | Construct site improvements for accessibility adjacent to existing commercial building (Costco) per plan. | $82,000 | |
| Addition or alteration | Construct alterations to existing commercial building (Costco warehouse) per plan. Mechanical Included | $430,000 | |
| Addition or alteration | Construct alterations in a commercial building to remodel 4 existing bathrooms subject to field inspection (STFI). | $140,000 | |
| Addition or alteration | Relocation of refrigerated display case and hand sink in existing retail space (Costco) subject to field inspection (STFI). | $15,000 | |
| Addition or alteration | Alterations to add a mezzanine in a commercial building at the SE corner per plan. | $682,315 | |
| Addition or alteration | Construct additions and alterations to expand existing gas station (Costco) per plan. | $1,039,594 | |
| Addition or alteration | Construct interior alterations to existing commercial building to expand produce cooler (adjacent west wall) and modify exit from tire center (along south wall) per plan. | $150,000 | |
| Addition or alteration | Addition and alteration to existing accessory to Optical Consultation room in (Costco 001) building per plans. | $125,876 | |
| Addition or alteration | Pharmacy food prep ("Demo Room") and Hearing Aid Center Remodel subject to field inspection (STFI) per plans. | $291,227 | |
| Addition or alteration | Construct slab/foundation for proposed above ground fuel tank installation at the SE end of the property (Costco Gas Station) per plan. | $75,000 | |
| Addition or alteration | TI-expand the existing produce cooler relocate the existing deli and expand the existing deli cooler. | $225,000 | |
| Addition or alteration | Closed as Incomplete - Expired Permit Alteration to remove and replace delay egress hardware on existing doors for Costco per plans | $22,500 | |
| Addition or alteration | Closed as Incomplete - Expired Permit Expand walk-in produce cooler room at COSTCO store by 4' in width and 4' in length per floor plan subject to field inpsection. | $15,000 |
Checked 2026-10-01 06:32 UTC against City of Seattle open data. Markdown · JSON