Mold Removal Cost And Risk In ZIP 21770, Green Valley MD

A typical professional mold job in ZIP 21770, Green Valley runs about $1,650 to $6,550 before rebuild. Half the homes here were built before 1988, older than the Frederick County median of 1990.

1988Median year homes were built

35%Homes built before 1980

2%Homes rented, not owned

$599,700Median home value

Not publishedMedian gross rent

2,448Housing units

Neighborhood figures for ZIP Code Tabulation Area 21770 from Census ACS 2019 to 2023. Remediation pay in this metro is $23.26 an hour, BLS May 2025 wage survey.

35 percent of homes in 21770 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 2 percent of homes here are rented, against 23 percent across Frederick County, so most households carry an owner's policy on the building.

The top of a typical mold job here, $6,550, is about 1.1 percent of the median home value of $599,700.

Typical Prices In 21770

JobSizeNational Range21770 Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,650 to $6,550
Mold Remediationan attic$2,000 to $7,500$2,200 to $8,150
Mold Inspection and Testinga visual inspection$200 to $600$200 to $650
Mold Inspection and Testingan inspection with samples$300 to $1,000$350 to $1,100
Mold Inspection and Testinga clearance test$300 to $800$350 to $850

Estimate is the national range times 108.9 divided by 100, the price level for Washington-Arlington-Alexandria, DC-VA-MD-WV, 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 $6,550, that cap falls short by about $1,550 at the top of that range. Read the form

Water Hazards FEMA Rates For Frederick County

FEMA rates Frederick 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 Low
Winter weatherRelatively High

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

Maryland Rules On Mold

Nearby ZIP Codes In Frederick County

Part of Green Valley, Frederick County, Maryland.

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21770, MD Area

Green Valley, Frederick County