Mold Removal Cost In Lake St. Louis, MO

A typical professional mold job in Lake St. Louis runs about $1,450 to $5,700 before rebuild. Lake St. Louis sits in St. Charles County.

1999Median year homes were built

19%Homes built before 1980

25%Homes rented, not owned

$375,300Median home value

7,495Housing units

17,538People

Figures for Lake St. Louis city from Census ACS 2019 to 2023.

Half the homes in Lake St. Louis were built before 1999, and 19 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 25 percent of homes in Lake St. Louis are rented, so most households here carry an owner's policy on the building itself.

Typical Prices In Lake St. Louis

JobSizeNational RangeLake St. Louis Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,450 to $5,700
Mold Remediationan attic$2,000 to $7,500$1,900 to $7,150
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 95.1 divided by 100, the price level for St. Louis, MO-IL, 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 $5,700, that cap falls short by about $700 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates St. Charles County high for inland flooding, 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 High
Coastal floodingNot Applicable
HurricaneVery Low
Cold waveRelatively High
Winter weatherRelatively High

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

ZIP Code Neighborhoods In Lake St. Louis

ZIPMedian Year BuiltHomes RentedMedian Home Value
63367200419%$381,000

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