Commercial Mold Remediation in Tukwila, WA

Our building took water when the Desimone Levee breached. What does remediation involve?

On December 15, 2025, during repeated atmospheric river storms, the Desimone Levee on the Green River breached in Tukwila. A GO NOW evacuation covered the part of the city south of S 180th Street and west of West Valley Highway, mostly industrial and business property. For buildings that took on water, EPA's disaster guidance applies: anything that could not be dried within 24 to 48 hours should be treated as moldy. In warehouses and shops that usually means cutting out the lower section of drywall and insulation, discarding wet carpet and ceiling tile, cleaning slab floors, racking and framing, and drying the structure before rebuilding. EPA's commercial guide calls for heavier containment as the affected area passes 100 square feet, which is common after a flood.

How does Tukwila's rental licensing affect apartment owners?

About 40 percent of Tukwila's housing units are owner-occupied, so most residents rent. Rentals in the city need an annual license through the Rental Housing Licensing Program, with a unit inspection before first occupancy and every four years, and tenants with living-condition concerns can ask the program for a courtesy city inspection. The program's page also links owners and tenants to mold resources. Washington law separately requires landlords to keep units weathertight, give tenants Department of Health mold information, and begin repairs within set times after written notice. This is general information, not legal advice.

Who permits the repairs?

The City of Tukwila Permit Center on Southcenter Boulevard issues construction permits, including building permits. Mold removal alone is not usually permitted work, but replacing walls, electrical, mechanical systems or structure generally is. King County flood services also publishes floodplain and hazard maps for the Green-Duwamish watershed that owners can check before rebuilding.

A Tukwila note

Retail and office tenants around Southcenter rarely want to close. Ask bidders to explain how they will phase the work, protect shared air, and show the area is clean before reopening. If the Green River flooded the building, keep moisture readings from the drying stage; they help the insurer and the person who signs off on the rebuild.