Post-Remediation Clearance Testing in Allyn, WA

Allyn at a glance

Allyn is a small waterfront community on the western shore of North Bay, part of Case Inlet. Most residents live in Lakeland Village, a multi-phase development of more than 800 homes built around a golf course and the private Lake Anderson. Shoreline air, tree cover and the long wet season mean crawl spaces, attics and wall cavities opened for mold work can stay damp longer than expected. A remediation crew can leave every surface looking spotless while the wood behind it still reads wet, and that hidden moisture is what lets growth return after the walls are closed.

Steps to take now

1. Keep the work area sealed. Containment stays up until the assessor finishes.
2. Book an assessor who did not do the removal. No Washington rule requires it, but Angi recommends separate companies.
3. Find the moisture source. Ask the remediation company what caused the growth and what was repaired.
4. Turn off the furnace if ducts were involved. EPA says not to run a system you suspect is contaminated, since it can spread mold through the house.
5. Ask for numbers in writing. Moisture readings, photos and lab results belong in the report.
6. Plan permits for the rebuild. Mason County Community Development handles building permits for unincorporated Mason County through its Permit Assistance Center.

What a clearance visit might find

Cost factors

Clearance runs on sampling prices. HomeGuide's 2026 national figures put air samples at $100 to $300 and surface samples at $50 to $200, and Angi's 2026 national data lists full inspections at $303 to $1,044. Expect the total to depend on the number of samples, crawl space access, travel and whether the area must be retested. Washington has no state mold license or certification, so ask any assessor about training and the lab used. Settle in writing, before the visit, who pays for re-cleaning and a second round of testing if the first result is a fail.