Mold Removal Cost And Risk In Johnson County, IA

A typical professional mold job in Johnson County runs about $1,350 to $5,500 before rebuild, using the Iowa City, IA price level. Below are the 13 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Iowa rules.

1991Median year homes were built

38%Homes built before 1980

41%Homes rented, not owned

$293,100Median home value

67,211Housing units

154,881People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Johnson County were built before 1991, and 38 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 41 percent of homes in Johnson County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 52755 has the oldest homes here, a median year of 1970, and ZIP 52340 the newest, 2010.

Typical Prices In Johnson County

JobSizeNational RangeJohnson 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 91.5 divided by 100, the price level for Iowa City, IA, 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 Johnson County high for cold wave, winter weather. 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 High

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

ZIP Code Neighborhoods In Johnson County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
52235Johnson County197756%$217,800
52240Johnson County198346%$241,100
52241Coralville199329%$286,000
52242Iowa CityNot published100%Not published
52245Iowa City197853%$293,300
52246Iowa City198937%$327,100
52247Johnson County197557%$257,400
52317Johnson County200413%$314,700
52322Johnson County197657%$249,100
52333Johnson County199243%$347,800
52338Johnson County199237%$384,600
52340Johnson County20106%$317,900
52755Johnson County197066%$219,800

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.

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Iowa City, IA