Crawl Space Mold Removal in Tukwila, WA

I rent in Tukwila. What can I do about a moldy crawl space?

Census figures put Tukwila's owner-occupied rate at about 40 percent, so most households here rent. Tukwila licenses rental housing: each rental needs an annual license and a unit inspection before it is first occupied and every four years after that, and tenants with concerns about living conditions can ask the Rental Housing Licensing Program, run through the Permit Center, for a courtesy city inspection. Start by telling your landlord about the musty smell or wet floor in writing. Washington landlords must keep a unit reasonably weathertight and in reasonable repair, and state law sets time frames for starting repairs after written notice. This is general information, not legal advice. The city's rental program also links to plain-language mold resources for tenants and owners.

Was my house affected by the Green River levee breach?

The Desimone Levee on the Green River in Tukwila breached on December 15, 2025, during a run of atmospheric river storms. The evacuation covered the part of the city south of S 180th Street and west of West Valley Highway, mostly an industrial and business area. If your home or rental took on water in that event or any other, assume the crawl space needs a close look. EPA advises treating anything that stayed wet past 24 to 48 hours as likely moldy.

How much does crawl space mold work cost?

Angi's Seattle cost guide lists crawl space jobs at $425 to $1,650, while HomeGuide's 2026 national range is $1,500 to $4,000. The biggest factors are the size of the space, how much clearance there is to work, how much insulation has to be bagged out, and whether a new ground cover or drainage fix is part of the bid. If ducts in the crawl space are contaminated, that is extra work; EPA says not to run a heating system you suspect has mold in it.

One local note

If removal turns up rotted sills or subfloor that need replacing, building permits come from the City of Tukwila Permit Center on Southcenter Boulevard. For health questions, Public Health - Seattle & King County has a mold page, though it does not do mold assessments itself.