Mold Removal Cost And Risk In Rock County, WI

A typical professional mold job in Rock County runs about $1,400 to $5,600 before rebuild, using the Janesville-Beloit, WI price level. Below are the 13 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Wisconsin rules.

1970Median year homes were built

66%Homes built before 1980

29%Homes rented, not owned

$215,900Median home value

70,694Housing units

163,944People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Rock County were built before 1970, and 66 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 29 percent of homes in Rock County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 53505 has the oldest homes here, a median year of 1940, and ZIP 53546 the newest, 1981.

Typical Prices In Rock County

JobSizeNational RangeRock County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,400 to $5,600
Mold Remediationan attic$2,000 to $7,500$1,850 to $7,050
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 93.7 divided by 100, the price level for Janesville-Beloit, WI, 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 $5,600, that cap falls short by about $600 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates Rock County high for cold wave. Water from these events is where mold claims start, and flood water is a separate policy. FloodSmart says mold damage is not covered under standard NFIP flood policies. FloodSmart

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

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

ZIP Code Neighborhoods In Rock County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
53501Rock CountyNot published100%Not published
53505Rock County194090%$258,300
53511Rock County195977%$160,000
53520Rock County196868%$211,500
53525Rock County196271%$229,100
53534Rock County197755%$280,100
53536Rock County198050%$274,600
53537Footville195694%$147,400
53545Rock County196576%$204,000
53546Rock County198149%$220,100
53548Rock County196669%$226,600
53563Rock County198050%$270,800
53576Rock County196772%$206,800

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

All Wisconsin Mold And Insurance Rules lines

All Wisconsin counties

Guides

Area Map

Rock County Area

Janesville-Beloit, WI