Mold Removal Cost And Risk In O'Brien County, IA

A typical professional mold job in O'Brien County runs about $1,250 to $5,050 before rebuild, using the Iowa nonmetro price level. Below are the 8 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Iowa rules.

1959Median year homes were built

74%Homes built before 1980

23%Homes rented, not owned

$158,900Median home value

6,544Housing units

14,103People

Housing figures from Census ACS 2019 to 2023.

Half the homes in O'Brien County were built before 1959, and 74 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 23 percent of homes in O'Brien County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 51009 has the oldest homes here, a median year of 1938, and ZIP 51248 the newest, 1964.

Typical Prices In O'Brien County

JobSizeNational RangeO'Brien County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,250 to $5,050
Mold Remediationan attic$2,000 to $7,500$1,700 to $6,300
Mold Inspection and Testinga visual inspection$200 to $600$150 to $500
Mold Inspection and Testingan inspection with samples$300 to $1,000$250 to $850
Mold Inspection and Testinga clearance test$300 to $800$250 to $650

Estimate is the national range times 84.1 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 $5,050, that cap falls short by about $50 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 O'Brien County.

HazardFEMA Risk Rating
Inland floodingVery Low
Coastal floodingNot Applicable
HurricaneNot Applicable
Cold waveRelatively Low
Winter weatherRelatively Moderate

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

ZIP Code Neighborhoods In O'Brien County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
51009Calumet193884%$65,000
51022O'Brien County193884%$169,400
51046O'Brien County195177%$161,200
51058O'Brien County193893%$116,100
51231O'Brien County195688%$179,600
51245O'Brien County196178%$139,500
51248O'Brien County196472%$154,400
51346O'Brien County195674%$125,800

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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O'Brien County Area

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