Mold Removal Cost And Risk In Jefferson County, WI

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

1974Median year homes were built

58%Homes built before 1980

27%Homes rented, not owned

$253,800Median home value

36,649Housing units

85,867People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Jefferson County were built before 1974, and 58 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 27 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 53094 has the oldest homes here, a median year of 1965, and ZIP 53036 the newest, 1998.

Typical Prices In Jefferson County

JobSizeNational RangeJefferson County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,350 to $5,350
Mold Remediationan attic$2,000 to $7,500$1,800 to $6,700
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 89.6 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 $5,350, that cap falls short by about $350 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 Moderate
Coastal floodingNot Applicable
HurricaneVery Low
Cold waveRelatively Moderate
Winter weatherRelatively Low

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

ZIP Code Neighborhoods In Jefferson County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
53036Jefferson County199844%$347,100
53038Jefferson County199638%$298,700
53094Jefferson County196570%$223,900
53137Jefferson County197753%$328,900
53156Jefferson County196970%$235,700
53178Jefferson County197659%$337,800
53538Jefferson County197064%$228,200
53549Jefferson County197357%$247,200
53551Jefferson County198149%$322,700
53594Jefferson County196663%$236,900

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.

Wisconsin Rules On Mold

Wisconsin Mold And Insurance Rules

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Area Map

Jefferson County Area

Watertown-Fort Atkinson, WI