Mold Removal Cost And Risk In St. Lawrence County, NY

A typical professional mold job in St. Lawrence County runs about $1,350 to $5,500 before rebuild, using the New York nonmetro price level. Below are the 44 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and New York rules.

1964Median year homes were built

68%Homes built before 1980

28%Homes rented, not owned

$119,800Median home value

51,884Housing units

107,796People

Housing figures from Census ACS 2019 to 2023.

Half the homes in St. Lawrence County were built before 1964, and 68 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 St. Lawrence County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 12965 has the oldest homes here, a median year of 1938, and ZIP 13647 the newest, 2002.

Typical Prices In St. Lawrence County

JobSizeNational RangeSt. Lawrence 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 St. Lawrence 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 floodingRelatively Moderate
Coastal floodingNot Applicable
HurricaneRelatively Low
Cold waveRelatively Moderate
Winter weatherRelatively High

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

ZIP Code Neighborhoods In St. Lawrence County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
12922St. Lawrence County195770%$193,800
12927St. Lawrence County196670%Not published
12965St. Lawrence County193881%$88,600
12967St. Lawrence County197655%$96,300
12973St. Lawrence County194769%$98,800
13613St. Lawrence County197952%$116,800
13614St. Lawrence County195271%Not published
13617St. Lawrence County197463%$148,900
13621St. Lawrence County198243%$160,300
13623St. Lawrence County196476%$114,800
13625St. Lawrence County197361%$161,900
13630St. Lawrence County193874%$85,100
13633St. Lawrence County197754%$90,000
13635St. Lawrence County195876%$96,300
13639St. Lawrence County200032%Not published
13642St. Lawrence County195575%$116,200
13646St. Lawrence County196066%$133,000
13647Hannawa Falls200216%Not published
13649St. Lawrence County198338%Not published
13652St. Lawrence County197362%$96,900
13654St. Lawrence County195764%$127,500
13658St. Lawrence County198245%$114,000
13660St. Lawrence County197554%$121,000
13662St. Lawrence County195780%$118,300
13664Morristown195373%$149,100
13666St. Lawrence County195678%$47,800
13667St. Lawrence County197261%$111,400
13668St. Lawrence County196662%$119,500
13669St. Lawrence County195277%$101,800
13670St. Lawrence County195973%$61,700
13672St. Lawrence County195983%$92,600
13676St. Lawrence County196963%$148,800
13678St. Lawrence CountyNot published0%Not published
13680St. Lawrence County198050%$134,600
13681St. Lawrence County197065%$72,800
13683AkwesasneNot published0%Not published
13684St. Lawrence County197951%$111,200
13687St. Lawrence County196565%$165,600
13690St. Lawrence County195389%$81,900
13694St. Lawrence County197257%$207,500
13695St. Lawrence County198249%$233,300
13696St. Lawrence County198240%Not published
13697St. Lawrence County199046%$144,900
13699PotsdamNot published0%Not published

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.

New York Rules On Mold

Who May Do Mold Work

New York licenses mold assessors, mold remediation contractors and mold abatement workers under Article 32 of the state Labor Law. The rules apply to mold jobs larger than 10 square feet. Some owners who do the work on their own homes are exempt.

The same person may not do both the assessment and the remediation on the same property. The assessor writes the plan, a separate licensed contractor does the work, and the assessor checks the result. You can check a license with the Department of Labor’s search for licensed mold contractors.

New York State Department of Labor

New York Mold And Insurance Rules

All New York Mold And Insurance Rules lines

New York Department of Financial Services

All New York Department of Financial Services lines

All New York counties

Guides

Area Map

St. Lawrence County Area

Massena-Ogdensburg, NY

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