Mold Removal Cost And Risk In Knox County, ME

A typical professional mold job in Knox County runs about $1,350 to $5,500 before rebuild, using the Maine nonmetro price level. Below are the 19 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Maine rules.

1973Median year homes were built

58%Homes built before 1980

22%Homes rented, not owned

$290,800Median home value

24,428Housing units

40,860People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Knox County were built before 1973, and 58 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 22 percent of homes in Knox County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 04853 has the oldest homes here, a median year of 1938, and ZIP 04847 the newest, 1992.

Typical Prices In Knox County

JobSizeNational RangeKnox 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 91.6 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 $5,500, that cap falls short by about $500 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates Knox County high for 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 floodingVery Low
Coastal floodingRelatively Moderate
HurricaneRelatively Moderate
Cold waveRelatively Low
Winter weatherRelatively High

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

ZIP Code Neighborhoods In Knox County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
04547Knox County197556%$265,300
04563Knox County198545%$370,800
04574Knox County198738%$186,800
04645Knox County195465%$662,500
04841Rockland195172%$234,400
04843Knox County197457%$486,300
04847Knox County199227%$301,500
04851Knox County195464%$425,000
04853Knox County193869%$404,700
04854Knox County197068%$331,500
04855Knox County193887%$359,400
04856Knox County197457%$415,100
04858Knox County198148%$305,200
04859Knox County198827%$744,000
04860Knox County196862%$310,000
04861Knox County195671%$260,100
04862Knox County198345%$236,700
04863Knox County196663%$435,500
04864Knox County197758%$215,500

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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