Mold Removal Cost And Risk In Jefferson County, ID

A typical professional mold job in Jefferson County runs about $1,400 to $5,650 before rebuild, using the Idaho Falls, ID price level. Below are the 7 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Idaho rules.

1991Median year homes were built

42%Homes built before 1980

18%Homes rented, not owned

$335,000Median home value

10,499Housing units

32,234People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Jefferson County were built before 1991, and 42 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 18 percent of homes in Jefferson County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 83435 has the oldest homes here, a median year of 1972, and ZIP 83442 the newest, 1999.

Typical Prices In Jefferson County

JobSizeNational RangeJefferson County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,400 to $5,650
Mold Remediationan attic$2,000 to $7,500$1,900 to $7,100
Mold Inspection and Testinga visual inspection$200 to $600$200 to $550
Mold Inspection and Testingan inspection with samples$300 to $1,000$300 to $950
Mold Inspection and Testinga clearance test$300 to $800$300 to $750

Estimate is the national range times 94.4 divided by 100, the price level for Idaho Falls, ID, 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 $5,650, that cap falls short by about $650 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 Jefferson County.

HazardFEMA Risk Rating
Inland floodingRelatively 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 Jefferson County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
83425Jefferson County198052%$222,400
83431Jefferson County198249%$238,600
83434Jefferson County197656%$240,400
83435Jefferson County197270%$211,200
83442Jefferson County199937%$376,800
83444Jefferson County198249%$180,500
83450Jefferson County197660%$183,700

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.

Idaho Rules On Mold

Idaho Mold And Insurance Rules

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Area Map

Jefferson County Area

Idaho Falls, ID