Mold Removal Cost And Risk In Marathon County, WI

A typical professional mold job in Marathon County runs about $1,400 to $5,550 before rebuild, using the Wausau, WI price level. Below are the 16 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Wisconsin rules.

1977Median year homes were built

55%Homes built before 1980

27%Homes rented, not owned

$205,500Median home value

60,296Housing units

138,067People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Marathon County were built before 1977, and 55 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 Marathon County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 54403 has the oldest homes here, a median year of 1959, and ZIP 54476 the newest, 1991.

Typical Prices In Marathon County

JobSizeNational RangeMarathon County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,400 to $5,550
Mold Remediationan attic$2,000 to $7,500$1,850 to $6,950
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 92.7 divided by 100, the price level for Wausau, 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 $5,550, that cap falls short by about $550 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates Marathon 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
HurricaneNo Rating
Cold waveRelatively High
Winter weatherRelatively Moderate

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

ZIP Code Neighborhoods In Marathon County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
54401Marathon County197460%$186,100
54403Marathon County195973%$179,400
54405Marathon County197657%$152,500
54408Marathon County198248%$159,400
54411Marathon County197059%$210,800
54417MaineNot published100%Not published
54421Marathon County197363%$178,800
54426Marathon County197654%$204,700
54427Marathon County197460%$176,000
54440Marathon County198050%$201,100
54448Marathon County197853%$239,300
54455Marathon County198940%$226,500
54471Marathon County198938%$275,400
54474Rothschild196868%$184,200
54476Weston199140%$211,300
54484Marathon County198447%$233,700

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.

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Marathon County Area

Wausau, WI