Mold Removal Cost In Johnston, IA

A typical professional mold job in Johnston runs about $1,400 to $5,500 before rebuild. Johnston sits in Polk County.

2004Median year homes were built

8%Homes built before 1980

28%Homes rented, not owned

$346,200Median home value

9,868Housing units

24,196People

Figures for Johnston city from Census ACS 2019 to 2023.

Half the homes in Johnston were built before 2004, and 8 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 28 percent of homes in Johnston are rented, so most households here carry an owner's policy on the building itself.

Typical Prices In Johnston

JobSizeNational RangeJohnston Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,400 to $5,500
Mold Remediationan attic$2,000 to $7,500$1,850 to $6,900
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 $900
Mold Inspection and Testinga clearance test$300 to $800$300 to $750

Estimate is the national range times 91.7 divided by 100, the price level for Des Moines-West Des Moines, 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 Polk 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 Johnston

ZIPMedian Year BuiltHomes RentedMedian Home Value
50131200428%$347,100

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