Mold Removal Cost And Risk In ZIP 94521, Concord CA

A typical professional mold job in ZIP 94521, Concord runs about $1,750 to $6,950 before rebuild. Half the homes here were built before 1974, older than the Contra Costa County median of 1978.

1974Median year homes were built

68%Homes built before 1980

27%Homes rented, not owned

$823,100Median home value

$2,388Median gross rent

16,083Housing units

Neighborhood figures for ZIP Code Tabulation Area 94521 from Census ACS 2019 to 2023. Remediation pay in this metro is $28.65 an hour, BLS May 2025 wage survey.

68 percent of homes in 94521 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 27 percent of homes here are rented, against 32 percent across Contra Costa County, so most households carry an owner's policy on the building.

The top of a typical mold job here, $6,950, is about 0.8 percent of the median home value of $823,100.

Typical Prices In 94521

JobSizeNational Range94521 Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,750 to $6,950
Mold Remediationan attic$2,000 to $7,500$2,300 to $8,650
Mold Inspection and Testinga visual inspection$200 to $600$250 to $700
Mold Inspection and Testingan inspection with samples$300 to $1,000$350 to $1,150
Mold Inspection and Testinga clearance test$300 to $800$350 to $900

Estimate is the national range times 115.6 divided by 100, the price level for San Francisco-Oakland-Fremont, CA, 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 $6,950, that cap falls short by about $1,950 at the top of that range. Read the form

Water Hazards FEMA Rates For Contra Costa County

FEMA rates Contra Costa County high for inland flooding. 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 High
Coastal floodingRelatively Moderate
HurricaneNot Applicable
Cold waveNo Rating
Winter weatherVery Low

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

California Rules On Mold

Nearby ZIP Codes In Contra Costa County

Part of Concord, Contra Costa County, California.

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94521, CA Area

Concord, Contra Costa County