Mold Removal Cost And Risk In New Castle County, DE

A typical professional mold job in New Castle County runs about $1,550 to $6,150 before rebuild, using the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD price level. Below are the 25 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and Delaware rules.

1975Median year homes were built

56%Homes built before 1980

32%Homes rented, not owned

$329,800Median home value

235,057Housing units

573,030People

Housing figures from Census ACS 2019 to 2023. Remediation workers here earn a median $23.62 an hour, BLS May 2025 wage survey.

Half the homes in New Castle County were built before 1975, and 56 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 32 percent of homes in New Castle County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 19731 has the oldest homes here, a median year of 1938, and ZIP 19709 the newest, 2005.

Typical Prices In New Castle County

JobSizeNational RangeNew Castle County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,550 to $6,150
Mold Remediationan attic$2,000 to $7,500$2,050 to $7,700
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 $800

Estimate is the national range times 102.6 divided by 100, the price level for Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 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 $6,150, that cap falls short by about $1,150 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates New Castle County high for inland flooding, coastal 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 floodingRelatively High
HurricaneRelatively Moderate
Cold waveRelatively High
Winter weatherVery High

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

ZIP Code Neighborhoods In New Castle County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
19701New Castle County199513%$337,800
19702New Castle County199226%$331,200
19703Claymont196574%$266,500
19706Delaware City196180%$244,600
19707Hockessin198441%$534,300
19709New Castle County20059%$444,900
19711New Castle County197755%$376,300
19713New Castle County197270%$267,500
19720New Castle County197164%$242,600
19730Odessa195282%$299,300
19731New Castle County193892%$347,500
19732New Castle County193875%$704,900
19733St. Georges193883%$220,500
19734New Castle County200317%$426,300
19736HockessinNot published100%Not published
19801Wilmington195866%$196,000
19802Wilmington195183%$188,400
19803New Castle County196085%$436,200
19804New Castle County195782%$244,700
19805New Castle County194888%$220,200
19806Wilmington195285%$370,500
19807New Castle County196761%$895,400
19808New Castle County197164%$309,700
19809New Castle County195778%$308,900
19810New Castle County196779%$420,300

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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Philadelphia-Camden-Wilmington, PA-NJ-DE-MD