Mold Removal Cost And Risk In Benton County, WA

A typical professional mold job in Benton County runs about $1,500 to $6,000 before rebuild, using the Kennewick-Richland, WA price level. Below are the 11 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Washington rules.

1987Median year homes were built

45%Homes built before 1980

32%Homes rented, not owned

$369,400Median home value

81,792Housing units

210,224People

Housing figures from Census ACS 2019 to 2023. Remediation workers here earn a median $50.26 an hour, BLS May 2025 wage survey.

Half the homes in Benton County were built before 1987, and 45 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 32 percent of homes in Benton County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 99354 has the oldest homes here, a median year of 1969, and ZIP 99338 the newest, 2004.

Typical Prices In Benton County

JobSizeNational RangeBenton County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,500 to $6,000
Mold Remediationan attic$2,000 to $7,500$2,000 to $7,500
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 $1,000
Mold Inspection and Testinga clearance test$300 to $800$300 to $800

Estimate is the national range times 100.1 divided by 100, the price level for Kennewick-Richland, 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 $6,000, that cap falls short by about $1,000 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates Benton County high for 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 floodingRelatively Moderate
Coastal floodingNot Applicable
HurricaneNot Applicable
Cold waveRelatively Moderate
Winter weatherRelatively High

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

ZIP Code Neighborhoods In Benton County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
98944Benton County197560%$230,100
99320Benton County199137%$300,300
99336Kennewick197659%$292,300
99337Benton County198944%$356,700
99338Benton County200419%$526,700
99345Benton County198545%$422,200
99346Benton County199231%$214,700
99350Benton County198542%$289,100
99352Richland199932%$442,100
99353West Richland200022%$407,600
99354Richland196971%$355,400

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.

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Benton County Area

Kennewick-Richland, WA