Mold Removal Cost And Risk In Walla Walla County, WA

A typical professional mold job in Walla Walla County runs about $1,500 to $5,900 before rebuild, using the Walla Walla, WA price level. Below are the 8 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Washington rules.

1973Median year homes were built

60%Homes built before 1980

34%Homes rented, not owned

$375,600Median home value

25,219Housing units

62,102People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Walla Walla County were built before 1973, and 60 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 Walla Walla County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 99361 has the oldest homes here, a median year of 1962, and ZIP 99363 the newest, 2004.

Typical Prices In Walla Walla County

JobSizeNational RangeWalla Walla County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,500 to $5,900
Mold Remediationan attic$2,000 to $7,500$1,950 to $7,400
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 98.5 divided by 100, the price level for Walla Walla, 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 $5,900, that cap falls short by about $900 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 Walla Walla County.

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

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

ZIP Code Neighborhoods In Walla Walla County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
99323Walla Walla County198248%$358,600
99324College Place198248%$338,600
99329Dixie197357%$277,500
99348Walla Walla County197754%$204,300
99360Walla Walla County197263%$492,300
99361Walla Walla County196270%$290,500
99362Walla Walla County196964%$398,000
99363Walla Walla County200426%$207,100

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

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Walla Walla County Area

Walla Walla, WA