Mold Removal Cost And Risk In St. Clair County, MO

A typical professional mold job in St. Clair County runs about $1,250 to $5,050 before rebuild, using the Missouri nonmetro price level. Below are the 6 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Missouri rules.

1977Median year homes were built

56%Homes built before 1980

24%Homes rented, not owned

$142,500Median home value

5,295Housing units

9,451People

Housing figures from Census ACS 2019 to 2023.

Half the homes in St. Clair County were built before 1977, and 56 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 24 percent of homes in St. Clair County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 64780 has the oldest homes here, a median year of 1938, and ZIP 64738 the newest, 1979.

Typical Prices In St. Clair County

JobSizeNational RangeSt. Clair County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,250 to $5,050
Mold Remediationan attic$2,000 to $7,500$1,700 to $6,300
Mold Inspection and Testinga visual inspection$200 to $600$150 to $500
Mold Inspection and Testingan inspection with samples$300 to $1,000$250 to $850
Mold Inspection and Testinga clearance test$300 to $800$250 to $650

Estimate is the national range times 83.9 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 $5,050, that cap falls short by about $50 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 St. Clair County.

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

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

ZIP Code Neighborhoods In St. Clair County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
64724St. Clair County197268%$108,300
64738St. Clair County197952%$181,300
64763St. Clair County197759%$141,600
64776St. Clair County197854%$140,700
64780St. Clair County193874%$66,300
64781Roscoe194183%$71,100

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.

Missouri Rules On Mold

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St. Clair County Area

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