Mold Removal Cost And Risk In Mercer County, NJ

A typical professional mold job in Mercer County runs about $1,550 to $6,200 before rebuild, using the Trenton-Princeton, NJ price level. Below are the 22 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and New Jersey rules.

1967Median year homes were built

66%Homes built before 1980

38%Homes rented, not owned

$351,000Median home value

150,600Housing units

383,286People

Housing figures from Census ACS 2019 to 2023. Remediation workers here earn a median $21.84 an hour, BLS May 2025 wage survey.

Half the homes in Mercer County were built before 1967, and 66 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 38 percent of homes in Mercer County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 08542 has the oldest homes here, a median year of 1938, and ZIP 08691 the newest, 1994.

Typical Prices In Mercer County

JobSizeNational RangeMercer County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,550 to $6,200
Mold Remediationan attic$2,000 to $7,500$2,050 to $7,750
Mold Inspection and Testinga visual inspection$200 to $600$200 to $600
Mold Inspection and Testingan inspection with samples$300 to $1,000$300 to $1,050
Mold Inspection and Testinga clearance test$300 to $800$300 to $850

Estimate is the national range times 103.2 divided by 100, the price level for Trenton-Princeton, NJ, 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 $6,200, that cap falls short by about $1,200 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates Mercer County high for inland flooding, hurricane, 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 floodingRelatively Low
HurricaneRelatively High
Cold waveRelatively Moderate
Winter weatherVery High

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

ZIP Code Neighborhoods In Mercer County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
08520Mercer County197563%$361,800
08525Mercer County195882%$551,300
08534Mercer County198247%$573,100
08540Mercer County198541%$723,400
08542Princeton193866%$754,800
08544PrincetonNot published0%Not published
08550Mercer County198829%$758,900
08560Mercer County196483%$399,700
08561Windsor195791%$479,500
08608Trenton197365%Not published
08609Trenton194389%$96,700
08610Mercer County195590%$248,900
08611Trenton194484%$142,400
08618Mercer County195584%$211,800
08619Mercer County196673%$320,800
08620Mercer County196674%$341,000
08628Mercer County197657%$358,100
08629Mercer County194992%$149,000
08638Mercer County195873%$226,700
08648Mercer County198050%$395,400
08690Hamilton Square197362%$362,700
08691Mercer County199417%$523,500

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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Mercer County Area

Trenton-Princeton, NJ