Mold Removal Cost And Risk In Petroleum County, MT

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

1978Median year homes were built

52%Homes built before 1980

23%Homes rented, not owned

$173,700Median home value

295Housing units

401People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Petroleum County were built before 1978, and 52 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 23 percent of homes in Petroleum County are rented, so most households here carry an owner's policy on the building itself.

Typical Prices In Petroleum County

JobSizeNational RangePetroleum 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 Petroleum County.

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

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

ZIP Code Neighborhoods In Petroleum County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
59087Petroleum County198051%$167,100

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.

Montana Rules On Mold

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Petroleum County Area

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