Black Mold Removal in Woodinville, WA

Woodinville homes and moisture

Woodinville sits on the Northshore end of the Eastside, about 15 miles from Seattle, along the Sammamish River. King County says the valley farmland between Redmond and Woodinville floods when the river runs high and upland stormwater can't drain, while from Woodinville down to Lake Washington the river generally stays in its banks. The median house or condo in the city was built around 1988, and apartments around 2009, so many homes are tighter than older Seattle stock. Tight houses hold moisture in, which is why bath fans and kitchen venting matter so much here.

What to do now

1. Find the water first. Common culprits are a bath fan vented into the attic, a leaking dishwasher line, or window condensation on north-facing rooms.
2. Size the area. Under about 10 square feet, EPA says you can usually clean a hard surface with detergent and water. Larger patches, or growth in insulation, call for a professional.
3. Turn off forced air near the growth if you think ducts or returns are involved; EPA warns that a contaminated system can spread mold.
4. Don't test just to learn the species. EPA says sampling is usually unnecessary when you can see the growth.
5. Get two written bids from companies registered with Washington L&I as construction contractors.

Signs and their usual source

What drives the cost

Angi's Seattle cost guide reports a typical job at $1,008 to $2,967, an attic at $825 to $3,300, and wall work anywhere from $825 to $16,550 depending on how much is opened. The final number depends on the square footage of material removed, containment and HEPA filtration, access, and repairs such as new drywall, which Angi lists at $825 to $2,400. If the rebuild needs a building permit, Woodinville Development Services handles applications through the city's online Permit Portal.