Post-Remediation Clearance Testing in Bothell, WA

Signs it is time for a clearance check

• The remediation company has finished HEPA vacuuming and wiping and wants to take down the plastic.
• Insulation or drywall delivery is scheduled and you have not seen moisture readings for the framing.
• Growth was found inside a wall or under a floor, where nobody can look again once it is closed.
• You want a document for a future sale or a homeowners claim.

Local conditions in Bothell

Bothell sits on the Sammamish River, which runs from Lake Sammamish through Redmond and Woodinville before reaching Lake Washington at Kenmore. King County says that from Woodinville downstream the river generally stays within its banks, so most Bothell mold jobs trace back to the house rather than the river: roof and window leaks, bathroom humidity, plumbing drips, and winter condensation on cold walls and in closed-up rooms. The median Bothell house or condo was built around 1989 and the median apartment around 2002, which means many homes are newer and fairly tight. Tight homes hold indoor moisture, so the assessor should check that the original cause, such as a weak bath fan, was dealt with, not only that the stain is gone.

Bothell straddles the King and Snohomish county line, and permits run through the City of Bothell Permit Center either way. If rebuilding comes next, check there first; electrical permits come from Washington L&I.

What affects the cost

Clearance pricing follows inspection and sampling rates. Angi's 2026 national figures place a full mold inspection at $303-$1,044, and HomeGuide's 2026 national ranges list air samples at $100-$300 and surface samples at $50-$200. Your total depends on the number of rooms inside containment, whether a crawl space or attic is part of it, how many samples are taken, and whether a retest is needed.

What happens when you call

The number on this page connects you with an independent local company. Have the remediation contract handy so the assessor can see what was promised. A useful question to ask: what result would cause you to fail this area? A clear answer up front prevents an argument later between you, the assessor and the crew.