Basement Mold Removal in Lynnwood, WA

A quick look at Lynnwood

Lynnwood sits at the junction of I-5 and I-405 about 15 miles north of Seattle. Most of the city drains to Swamp Creek or to Puget Sound through Lund's Gulch, and Scriber Creek, Scriber Lake and Hall Lake lie within city limits. An Esri-based community profile estimates more renter-occupied than owner-occupied households, so many people dealing with basement mold here are tenants in lower-level units or daylight apartments. Below-grade bedrooms with small windows, little cross-ventilation and a lot of daily cooking and laundry moisture are a common setting for winter mold on outside walls.

What to do now

1. Write it down. Note where the mold is, when you first noticed it and whether it gets worse after rain. Photos help.
2. If you rent, tell the landlord in writing. Washington law gives landlords set times to begin repairs after written notice.
3. If you own, look for the water. Check gutters, window wells, the water heater and laundry connections.
4. Dry and ventilate. Run a dehumidifier, open interior doors and keep humidity under 60 percent.
5. Keep sensitive people out. EPA says people with asthma or weakened immune systems should stay away from moldy areas.

What you see and the likely cause

Cost factors

Angi's Seattle cost guide lists basement mold remediation at $425 to $2,475, and HomeGuide's 2026 national figure for a partial basement is $1,500 to $6,000. Finished walls, larger areas and replacing drywall or carpet push the price up. Rebuild permits are issued by Lynnwood Development & Business Services. Renters can report homes in severe disrepair to Lynnwood Code Enforcement in the same department; properties outside city limits go to Snohomish County Code Enforcement. The county health department does not investigate mold in private residences. Hire contractors registered with Washington L&I.