Mold Removal Cost And Risk In Mason County, WA

A typical professional mold job in Mason County runs about $1,450 to $5,850 before rebuild, using the Washington nonmetro price level. Below are the 9 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Washington rules.

1988Median year homes were built

38%Homes built before 1980

19%Homes rented, not owned

$377,400Median home value

33,751Housing units

66,968People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Mason County were built before 1988, and 38 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 19 percent of homes in Mason County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 98555 has the oldest homes here, a median year of 1983, and ZIP 98524 the newest, 1994.

Typical Prices In Mason County

JobSizeNational RangeMason County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,450 to $5,850
Mold Remediationan attic$2,000 to $7,500$1,950 to $7,300
Mold Inspection and Testinga visual inspection$200 to $600$200 to $600
Mold Inspection and Testingan inspection with samples$300 to $1,000$300 to $950
Mold Inspection and Testinga clearance test$300 to $800$300 to $800

Estimate is the national range times 97.4 divided by 100, the price level for the nonmetro part of the state, 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 $5,850, that cap falls short by about $850 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates none of the water hazards below as high for Mason County.

HazardFEMA Risk Rating
Inland floodingRelatively Moderate
Coastal floodingRelatively Moderate
HurricaneNot Applicable
Cold waveNo Rating
Winter weatherRelatively Low

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

ZIP Code Neighborhoods In Mason County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
98524Mason County199432%$513,400
98528Mason County199036%$367,400
98546Mason County198939%$482,200
98548Mason County198833%$255,000
98555Mason County198340%Not published
98560Mason County198630%$506,000
98584Mason County198740%$365,200
98588Mason County199126%$325,000
98592Mason County198644%$520,900

ZIP areas are Census ZIP Code Tabulation Areas, placed in the county that holds most of their land, per the Census 2020 ZIP relationship files.

Washington Rules On Mold

Washington Mold And Insurance Rules

All Washington Mold And Insurance Rules lines

Washington Office of the Insurance Commissioner

All Washington Office of the Insurance Commissioner lines

All Washington counties

Guides

Area Map

Mason County Area

Shelton, WA