Mold Removal Cost And Risk In Humboldt County, CA

A typical professional mold job in Humboldt County runs about $1,500 to $6,000 before rebuild, using the California nonmetro price level. Below are the 35 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and California rules.

1973Median year homes were built

60%Homes built before 1980

44%Homes rented, not owned

$418,800Median home value

62,625Housing units

135,418People

Housing figures from Census ACS 2019 to 2023.

Half the homes in Humboldt County were built before 1973, and 60 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 44 percent of homes in Humboldt County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 95564 has the oldest homes here, a median year of 1938, and ZIP 95556 the newest, 2000.

Typical Prices In Humboldt County

JobSizeNational RangeHumboldt County Estimate
Mold Remediationa typical professional job$1,500 to $6,000$1,500 to $6,000
Mold Remediationan attic$2,000 to $7,500$2,000 to $7,500
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 $1,000
Mold Inspection and Testinga clearance test$300 to $800$300 to $800

Estimate is the national range times 100.0 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 $6,000, that cap falls short by about $1,000 at the top of that range. Read the form

Water Hazards FEMA Rates Here

FEMA rates Humboldt County high for inland flooding, coastal 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 floodingRelatively High
Coastal floodingRelatively High
HurricaneNot Applicable
Cold waveNo Rating
Winter weatherVery Low

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

ZIP Code Neighborhoods In Humboldt County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
95501Eureka195578%$389,900
95503Humboldt County197266%$411,500
95511Humboldt County199435%Not published
95514Humboldt County197952%Not published
95519Humboldt County199136%$432,600
95521Humboldt County197557%$478,600
95524Humboldt County196678%$585,100
95525Humboldt County196477%$489,600
95526Humboldt County197662%$338,000
95528Humboldt County197261%$514,800
95536Humboldt County195666%$570,800
95537Fields Landing198328%$360,300
95540Humboldt County197657%$362,400
95542Humboldt County197757%$413,800
95545Humboldt County198348%$479,500
95546Humboldt County198541%$252,800
95547Hydesville198245%$489,100
95549Humboldt County198542%$661,200
95550Humboldt County195874%$857,100
95551Humboldt County195577%$469,800
95553Humboldt County196762%$437,900
95554Humboldt County197953%$431,300
95555Humboldt County195985%$400,000
95556Humboldt County200014%$323,600
95558Humboldt County197565%Not published
95559Humboldt CountyNot published74%Not published
95560Humboldt County195375%$363,700
95562Humboldt County196761%$310,600
95564Humboldt County193884%$421,900
95565Humboldt County193895%$350,000
95569Humboldt County197662%$433,300
95570Humboldt County197557%$599,300
95571Humboldt County196577%Not published
95573Humboldt County197762%$337,400
95589Humboldt County198544%$439,000

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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