Mold Removal Cost And Risk In Washington County, OH

A typical professional mold job in Washington County runs about $1,300 to $5,300 before rebuild, using the Ohio nonmetro price level. Below are the 15 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Ohio rules.

1973Median year homes were built

63%Homes built before 1980

25%Homes rented, not owned

$174,100Median home value

27,979Housing units

59,318People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Washington County were built before 1973, and 63 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 25 percent of homes in Washington County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 45744 has the oldest homes here, a median year of 1954, and ZIP 45724 the newest, 1990.

Typical Prices In Washington County

JobSizeNational RangeWashington County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,300 to $5,300
Mold Remediationan attic$2,000 to $7,500$1,750 to $6,600
Mold Inspection and Testinga visual inspection$200 to $600$200 to $550
Mold Inspection and Testingan inspection with samples$300 to $1,000$250 to $900
Mold Inspection and Testinga clearance test$300 to $800$250 to $700

Estimate is the national range times 88.3 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 $5,300, that cap falls short by about $300 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 Washington County.

HazardFEMA Risk Rating
Inland floodingRelatively Moderate
Coastal floodingNot Applicable
HurricaneVery Low
Cold waveVery Low
Winter weatherVery Low

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

ZIP Code Neighborhoods In Washington County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
45714Washington County197168%$158,800
45721Washington CountyNot published100%Not published
45724Washington County199039%$148,300
45729Washington County198248%$221,700
45742Washington County197755%$173,700
45744Washington County195468%$170,300
45746Washington County196777%$92,600
45750Washington County196968%$177,600
45767Washington County196963%$122,600
45768Washington County198445%$198,300
45773Washington County197558%$239,100
45784Washington County198538%$207,700
45786Washington County197854%$194,500
45788Washington County197657%$156,700
45789Washington County197268%Not published

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.

Ohio Rules On Mold

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Washington County Area

Marietta, OH