Mold Testing in Stanwood, WA

Signs worth a closer look

• A musty smell that returns in winter in a room that once took on water.
• Staining or swelling at the bottom of walls or cabinets.
• A damp, earthy odor rising from the crawl space.
• Condensation on windows and cold walls that never fully dries.

Stanwood's flood setting

Stanwood sits on the floodplain near the mouth of the Stillaguamish River, where it meets the tidal estuaries of Skagit Bay. Century-old dikes protect about 2,200 acres of surrounding farmland, and Highway 532 acts as a levee for downtown. When the river rises above Irvine Slough, stormwater backs up and downtown can flood; the city keeps a deployable floodwall on Marine Drive for high-river events. The history is long. In 1910 floodwater covered the floors of nearly every house in town, in 1951 dikes failed at Stanwood and East Stanwood, and in 1990 Leque Road residents evacuated. In January 2009, boats and hovercraft rescued people on Marine Drive and Thomle Road in four to five feet of water. In December 2023 the Stillaguamish set a record crest upstream at Arlington, and the dikes west of town held. Older homes may carry damage from more than one of those events.

What affects the cost

Price depends on how many rooms and cavities are sampled, the outdoor control sample, lab fees and access under the house. As a national reference, Angi's 2026 data lists testing with air and surface sampling at $250 to $500. After a flood, EPA's disaster guide says to assume mold in anything that stayed wet past 24 to 48 hours, so put the first dollars toward drying and removal and save testing for confirming the work.

What happens when you call

You're connected with an independent local mold inspector who will ask about water history, what has been removed and what you need the results for. Angi suggests a tester separate from the remediation company, especially for clearance. Stanwood's Community Development Department issues building permits and Floodplain Development Permits, and a floodplain structure damaged or improved by more than 50 percent of its market value must be elevated. Stanwood Code Compliance takes building and nuisance concerns through the city's Report a Concern form.