Mold Removal Cost And Risk In San Mateo County, CA

A typical professional mold job in San Mateo County runs about $1,750 to $6,950 before rebuild, using the San Francisco-Oakland-Fremont, CA price level. Below are the 29 ZIP code neighborhoods, the age of the homes, FEMA's water hazard ratings and California rules.

1966Median year homes were built

73%Homes built before 1980

41%Homes rented, not owned

$1,494,500Median home value

285,558Housing units

745,100People

Housing figures from Census ACS 2019 to 2023. Remediation workers here earn a median $28.65 an hour, BLS May 2025 wage survey.

Half the homes in San Mateo County were built before 1966, and 73 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 41 percent of homes in San Mateo County are rented, so most households here carry an owner's policy on the building itself.

Housing age swings by neighborhood. ZIP 94021 has the oldest homes here, a median year of 1938, and ZIP 94065 the newest, 1987.

Typical Prices In San Mateo County

JobSizeNational RangeSan Mateo County 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 Here

FEMA rates San Mateo 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 San Mateo County

ZIPAreaMedian Year BuiltBuilt Before 1980Median Home Value
94002Belmont196683%$2,000,001
94005Brisbane196763%$1,127,200
94010Hillsborough195979%$2,000,001
94014Daly City196768%$979,500
94015Daly City196484%$1,152,900
94018El Granada198342%$1,405,400
94019San Mateo County198148%$1,509,300
94020San Mateo County196067%$1,158,100
94021San Mateo County1938100%$1,020,800
94025Menlo Park196174%$2,000,001
94027Atherton196062%$2,000,001
94028Portola Valley196873%$2,000,001
94030Millbrae196079%$1,929,700
94037Montara197567%$1,467,400
94038San Mateo County197277%$1,112,900
94044Pacifica196681%$1,211,700
94060San Mateo County197665%$1,338,200
94061Redwood City195979%$1,938,300
94062San Mateo County195975%$2,000,001
94063Redwood City196959%$1,077,100
94065Redwood City198726%$1,847,000
94066San Bruno196182%$1,199,400
94070San Carlos196276%$2,000,001
94074San Mateo County195864%Not published
94080South San Francisco196372%$1,159,500
94401San Mateo196472%$1,123,300
94402San Mateo195878%$2,000,001
94403San Mateo196572%$1,725,900
94404Foster City197764%$1,682,700

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.

Cities And Towns

California Rules On Mold

California Mold And Insurance Rules

All California Mold And Insurance Rules lines

California Department of Insurance

All California Department of Insurance lines

All California counties

Guides

Area Map

San Mateo County Area

San Francisco-Oakland-Fremont, CA