Mold Removal Cost In Mercer Island, WA

A typical professional mold job in Mercer Island runs about $1,650 to $6,650 before rebuild. Mercer Island sits in King County.

1973Median year homes were built

61%Homes built before 1980

34%Homes rented, not owned

$1,884,200Median home value

10,454Housing units

25,282People

Figures for Mercer Island city from Census ACS 2019 to 2023.

Half the homes in Mercer Island were built before 1973, and 61 percent went up before 1980. Older plumbing, roofs and window seals are where slow leaks start, and slow leaks are the mold most home policies leave out. About 34 percent of homes in Mercer Island are rented, so most households here carry an owner's policy on the building itself.

Typical Prices In Mercer Island

JobSizeNational RangeMercer Island Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,650 to $6,650
Mold Remediationan attic$2,000 to $7,500$2,200 to $8,350
Mold Inspection and Testinga visual inspection$200 to $600$200 to $650
Mold Inspection and Testingan inspection with samples$300 to $1,000$350 to $1,100
Mold Inspection and Testinga clearance test$300 to $800$350 to $900

Estimate is the national range times 111.1 divided by 100, the price level for Seattle-Tacoma-Bellevue, WA, rounded to $50. National ranges from Remediational cost guide, price level from BEA Regional Price Parities 2024.

The standard limited fungi endorsement caps mold at $5,000. Against a typical job here of up to $6,650, that cap falls short by about $1,650 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates King County high for inland flooding, winter weather. Water from these events is where mold claims start, and flood water is a separate policy. FloodSmart says mold damage is not covered under standard NFIP flood policies. FloodSmart

HazardFEMA Risk Rating
Inland floodingVery High
Coastal floodingRelatively Moderate
HurricaneNot Applicable
Cold waveRelatively Low
Winter weatherRelatively High

Source FEMA National Risk Index, December 2025, county level.

ZIP Code Neighborhoods In Mercer Island

ZIPMedian Year BuiltHomes RentedMedian Home Value
98040197334%$1,884,200

Washington Rules On Mold

Washington Mold And Insurance Rules

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Washington Office of the Insurance Commissioner

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Mercer Island Area

Mercer Island city