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1857 Kern Mountain Way, Antioch, CA 94531 Property Records

Contra Costa County property record for 1857 Kern Mountain Way, Antioch, CA 94531

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 2,333 sqft · built 1999
Lot Size0.147 acres (6,388 sqft)
Owner2 Individual Names on File
Last Sale$340,000 (Mar 2013)
Tax Bill$4,990 (2025)
Deeds & MortgagesFeb 2020 Transfer
Feb 2020 Transfer
Flood ZoneZone X (minimal risk)
APN055-490-001-9

Property Details

APN / Parcel Number

Primary APN055-490-001-9
Alternative APN
  • 055-490-001

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms9 Rooms
Stories1 Story
Building Area2,333 sqft Living Area
1st Floor Area2,333 sqft

Exterior

Year BuiltBuilt 1999
Effective Year BuiltEffective 2005
Lot Area6,388 sqft (0.147 acres)
Garage TypeAttached
Garage Area619 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemCentral

Location & Zoning

Street Address1857 KERN MOUNTAIN WAY
CityANTIOCH
StateCA
Zip94531-7497
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionT8182 L534
Legal SubdivisionSUBDIVISION 8182
Legal Tract8182
Legal Lot Number534
JurisdictionCONTRA COSTA CA
Township / Civil DivisionTASSAJARA
Census Block Group1
Census Block1015
Census Tract355120

Owner

1857 Kern Mountain Way is owned and occupied by two individuals who acquired it in February 2020.

Source: Contra Costa County records, as of July 14, 2026

Owner of Record2 Individual Names on File
Mailing Address1857 KERN MOUNTAIN WAY, ANTIOCH, CA 94531-7497
OccupancyOwner Occupied
Owner TypeIndividual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

DateDocument
Feb 24, 2020Quit Claim Deed, Transfer
FIRST AMERICAN TITLE
Feb 24, 2020Intrafamily Transfer, Transfer
FIRST AMERICAN TITLE COMPANY

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleMar 29, 2013 · Amount on File
Deed SaleMar 29, 2013 · Amount on File
Prior SaleJan 15, 2013 · Amount on File
Deed Document Number201378779
Last Transfer DateFeb 14, 2020
Transfer Doc0000033663
Record UpdatedOct 29, 2026

February 2020: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateFeb 24, 2020
Property Address1857 KERN MOUNTAIN WAY, ANTIOCH, CA 94531-7497
Document Number0000033664
Instrument DateFeb 14, 2020
Instrument33664
Transaction TypeTransfer
Record UpdatedMar 4, 2020
Title CompanyFIRST AMERICAN TITLE

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipSeparate Estate/Property
Address1857 KERN MOUNTAIN WAY ANTIOCH CA 945317497, ANTIOCH, CA 94531-7497

February 2020: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateFeb 24, 2020
Property Address1857 KERN MOUNTAIN WAY, ANTIOCH, CA 94531-7497
Document Number0000033663
Map ReferenceMB 405 PG 1
Instrument DateFeb 14, 2020
Instrument2020-033663
Transaction TypeTransfer
Record UpdatedNov 3, 2022
Title CompanyFIRST AMERICAN TITLE COMPANY

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address1857 KERN MOUNTAIN WAY, ANTIOCH, CA 94531-7497

Tax Assessment & Valuation

The 2025 property tax bill for 1857 Kern Mountain Way was $4,990 with a homeowner's exemption.

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityAntioch City
Unified School DistrictAntioch Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$427,044 (+2%) Land $81,637 Building $345,407
2025$4,990.00 Homeowner's exemption$418,672 Land $80,037 Building $338,635
2023$4,694.00 (+1.58%) Homeowner's exemption$402,417 Land $76,930 Building $325,487
2022$4,621.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 1857 Kern Mountain Way in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Wildfire risk around 1857 Kern Mountain Way is low, with a 0.02% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskLow
lower than 80% of the US · lower than 88% of California
Wildfire Likelihood0.02% annual chance
ExposureNone
beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemCITY OF ANTIOCH
serves 116,781 people · EPA ID CA0710001
Water SourceSurface water
Last State InspectionJan 2024
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 611 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
AT&T
Fiber · DSL		5,000 / 5,000
Xfinity
Cable		2,000 / 250

May also be available: T-Mobile, Unwired.

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