Mold Removal Cost And Risk In Valley County, MT

A typical professional mold job in Valley County runs about $1,350 to $5,500 before rebuild, using the Montana nonmetro price level. Below are the 10 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Montana rules.

1966Median year homes were built

79%Homes built before 1980

22%Homes rented, not owned

$198,600Median home value

4,253Housing units

7,540People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Valley County were built before 1966, and 79 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 22 percent of homes in Valley County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 59244 has the oldest homes here, a median year of 1955, and ZIP 59273 the newest, 1990.

Typical Prices In Valley County

JobSizeNational RangeValley County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,350 to $5,500
Mold Remediationan attic$2,000 to $7,500$1,850 to $6,850
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 $750

Estimate is the national range times 91.6 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 $5,500, that cap falls short by about $500 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 Valley County.

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

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

ZIP Code Neighborhoods In Valley County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
59225Valley County197278%$107,100
59230Valley County196874%$237,700
59231St. Marie1963100%Not published
59240Valley County196383%$266,700
59241Valley County196378%$119,300
59244Valley County195582%Not published
59248Valley County196677%$210,900
59250Valley County196357%$51,700
59260Valley County197558%$170,800
59273Valley County199025%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.

Montana Rules On Mold

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Valley County Area

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