Mold Removal & Remediation in Redmond, WA

Does the Sammamish River flood Redmond homes?

Rarely in the way people picture. The river leaves Lake Sammamish at Marymoor Park and runs north along the west edge of downtown. King County notes that high water can limit access to NE 95th Street and low parts of the Sammamish River Trail and back up into stormwater facilities, and that farmland between Redmond and Woodinville floods when the river is high and upland stormwater can't drain. For most homes on Education Hill, in Overlake or near Redmond Town Center, the moisture that feeds mold comes from inside: a leaking supply line, a shower pan, a bath fan venting into the attic, or condensation during the long wet season. The median house in Redmond dates to about 1984, old enough for original roofs, windows and plumbing to start failing.

When do I need a professional instead of cleaning it myself?

EPA and the Washington Department of Health set the same practical threshold: about 10 square feet. Below that, on a nonporous surface, with the water fixed, a homeowner can usually clean it. Call in a remediation company when:

• growth is larger, or hidden in walls, floors or the attic
• drywall, insulation or carpet is affected
• the forced-air system may be carrying spores; EPA says not to run it if you suspect contamination
• someone in the household has asthma or a weakened immune system

Color doesn't change that answer. Black, green or white growth is handled the same way, based on the material and how far it spread.

I rent in Redmond. Will the city deal with the mold?

Not directly. Redmond Code Enforcement says it does not oversee general 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, after the tenant has notified the landlord in writing. Under state law, landlords must keep units weathertight and in reasonable repair and must give tenants Department of Health-approved mold information. After written notice, a landlord generally has 10 days to begin repairs on non-emergency problems. This is general information, not legal advice.

One more Redmond note

Redmond is about 10 miles from Seattle. If remediation leads to new drywall or structural work, the Development Services Center reviews and issues construction permits. Angi's Seattle cost guide puts typical jobs between $1,008 and $2,967, and any company you hire should show up as registered on L&I's Verify a Contractor tool.