Mold & Mildew Cleanup in Redmond, WA

Why does mildew keep growing in my Redmond home?

Redmond lies about 10 miles east of Seattle, with downtown just north of Lake Sammamish and the Sammamish River leaving the lake at Marymoor Park and running along the west side of downtown. The median home was built in 1984, and many houses on Education Hill and in Overlake still have original bath fans and windows. Through the long wet season, windows stay closed and indoor moisture condenses on the coldest surfaces. Mildew that comes back after cleaning almost always means the room never dries: a fan that doesn't run long enough, furniture blocking airflow, or a slow leak. Keeping indoor humidity under 60 percent, as EPA recommends, matters more than the cleaner you use.

River flooding is a smaller factor here. King County notes the Sammamish River can limit access to NE 95th Street and low parts of the Sammamish River Trail and back water into stormwater facilities, so homes close to the river should check lower rooms after heavy rain.

I rent. Will the city deal with mildew in my apartment?

Not directly. Redmond Code Enforcement says it does not oversee general property maintenance issues such as mold, pests or odors. It acts only when conditions meet the state definition of substandard or dangerous housing under RCW 59.18, and only after the tenant has notified the landlord in writing. In general, Washington landlords must keep units reasonably weathertight, repair leaks and broken ventilation, and give tenants DOH-approved mold information. This is general information, not legal advice.

When is it time to call a professional?

EPA and Washington DOH use about 10 square feet as the cutoff for homeowner cleanup. Beyond that, or when drywall feels soft, stains through from behind, or the growth is inside a wall or ceiling, hire a professional. Angi's Seattle cost guide lists bathroom mold remediation at $425 to $825, with most pros charging $10 to $25 a square foot.

One Redmond note

If cleanup means replacing drywall or other building materials, the Redmond Development Services Center reviews and issues construction permits. Confirm any company you hire is registered with Washington L&I as a construction contractor.