Mold & Mildew Cleanup in Bothell, WA

Warning signs

• Black spotting in shower grout or silicone that bleach no longer lifts
• Water pooling on window sills on cold mornings, with dark specks in the corners
• A sour smell from a coat closet or linen closet on an exterior wall
• Gray patches behind a bed or bookcase set flush against the wall
• Peeling paint on a bathroom ceiling

Why it builds up in Bothell

Bothell lies about 14 miles northeast of Seattle in the Northshore area, part of it in King County and part in Snohomish. The Sammamish River runs through town toward Lake Washington, and King County says that stretch generally stays within its banks, so mildew here is much more often an indoor-air problem than a flood problem. The city's median house or condo was built in 1989. Homes of that age often have original bath fans that move little air, window seals that have started to fail, and laundry rooms or bathrooms without an outside vent. Through months of cool, cloudy weather, households keep windows shut, and the moisture from showers, cooking and drying clothes has nowhere to go but the coldest surface in the room.

Apartments and townhomes face the same pattern in a smaller space. The median apartment in Bothell was built in 2002, and tighter, newer units can hold humidity in unless fans run regularly.

Cost factors

Angi's Seattle cost guide lists bathroom mold remediation at $425 to $825 and labor at about $75 to $120 an hour. Price depends on how much surface is affected, whether drywall or ceiling material has to be cut out instead of cleaned, how many rooms are involved, and whether fan or vent work is added to the scope. Ask for cleaning, removal and repair as separate lines so you can compare bids. If walls come out, the City of Bothell Permit Center takes building permit applications online.

What to expect from the call

You'll be connected with an independent local company; this site isn't a contractor. Have photos ready and know whether the mildew follows showers, cold snaps or a leak. The company should check moisture in the materials, explain the cause and give a written scope. Confirm it is registered with Washington L&I as a construction contractor on the Verify a Contractor tool, since Washington has no mold-specific license.