Mold Inspection in Tacoma, WA

When to book an inspection

• A smell in a basement or lower floor that never fully clears.
• Brown rings on a ceiling under a bathroom or roof valley.
• Mildew coming back on the same closet wall each winter.
• Water in the basement or crawl space after a heavy rain.
• You're buying a house in the North End, Stadium District, Proctor or the North Slope and want the hidden spaces checked.

What drives moisture in Tacoma

Tacoma wraps around Commencement Bay, with the Thea Foss Waterway downtown and the Puyallup River at its edge. The city's comprehensive plan treats the 100-year and 500-year floodplains as flood hazard areas, expects greater flood risk on the Puyallup River, and identifies the West End, North End and Tideflats as more exposed to coastal flooding and sea level rise than inland areas. Away from the water, the common sources are ordinary ones: older roofs, basements dug into hillsides, crawl spaces with no vapor barrier, and bathrooms with weak exhaust fans. The Tacoma-Pierce County Health Department's guidance says molds grow where there is too much water and advises stopping leaks, repairing roofs and plumbing, and moving water away from basement walls and slabs.

Cost factors

Angi's 2026 national data puts mold inspections at roughly $303 to $1,044; HomeGuide's 2026 national range is $300 to $650. A small apartment costs less to inspect than a three-story house with a full basement and a cramped attic. Sampling adds cost, and EPA says it usually isn't needed when mold is visible. Multi-unit buildings and mixed-use properties usually take longer and may need more than one visit.

What happens when you call

You're connected with an independent local company that can describe its process and schedule a visit. Ask for a written report with photos and readings. Washington has no state mold certification, so ask about training, and check any company that will do repairs on L&I's Verify a Contractor tool. Drywall or structural repairs afterward go through the City of Tacoma Permit Center. Renters who have given written notice without results can file a Rental Housing Code complaint through TacomaFirst 311; Code Compliance inspects building conditions such as leaking roofs.