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4143 Mt Isabel Rd, Antioch, CA 94531 Property Records

Contra Costa County property record for 4143 Mt Isabel Rd, Antioch, CA 94531

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 1,997 sqft · built 2001
Lot Size0.174 acres (7,572 sqft)
Owner2 Trust Names on File
Last Sale$220,000 (Jul 2010)
Tax Bill$3,674 (2025)
Deeds & MortgagesDec 2017 Transfer
Flood ZoneZone X (minimal risk)
APN055-650-019-7

Property Details

APN / Parcel Number

Primary APN055-650-019-7
Alternative APN
  • 055-650-019

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms8 Rooms
Stories2 Stories
Building Area1,997 sqft Living Area
1st Floor Area936 sqft
2nd Floor Area1,061 sqft

Exterior

Year BuiltBuilt 2001
Effective Year BuiltEffective 2001
Lot Area7,572 sqft (0.174 acres)
Garage TypeAttached
Garage Area478 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemCentral

Location & Zoning

Street Address4143 MOUNT ISABEL RD
CityANTIOCH
StateCA
Zip94531-9107
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeA-2
Legal DescriptionT8410 L94
Legal SubdivisionSUBDIVISION 8410
Legal Tract8410
Legal Lot Number94
JurisdictionCONTRA COSTA CA
Township / Civil DivisionTASSAJARA
Census Block Group1
Census Block1002
Census Tract355118

Owner

4143 Mt Isabel Rd is held in a trust since April 2017.

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

Owner of Record2 Trust Names on File
Mailing Address770 WOODSTOCK LN, LOS ALTOS, CA 94022-3964
Owner TypeCompany
VestingTrust

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

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleJul 2, 2010 · Amount on File
Deed SaleJul 2, 2010 · Amount on File
Prior SaleAug 31, 2009
Deed Document Number2010132866
Last Transfer DateApr 6, 2017
Transfer Doc0000236969
Record UpdatedOct 29, 2026

December 2017: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateDec 18, 2017
Property Address4143 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107
Document Number0000236969
Instrument DateApr 6, 2017
Instrument236969
Transaction TypeTransfer
Record UpdatedJan 3, 2018
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipPersonal Trust
Address770 WOODSTOCK LN LOS ALTOS CA 940223964, LOS ALTOS, CA 94022-3964

Tax Assessment & Valuation

The 2025 property tax bill for 4143 Mt Isabel Rd was $3,674.

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$287,482 (+2%) Land $45,729 Building $241,753
2025$3,674.00$281,846 Land $44,833 Building $237,013
2023$3,452.00 (+1.44%)$270,903 Land $43,093 Building $227,810
2022$3,403.00

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

Flood

FEMA maps place 4143 Mt Isabel Rd 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 4143 Mt Isabel Rd is low, with a 0.04% annual chance of wildfire.

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

Wildfire RiskLow
lower than 67% of the US · lower than 81% of California
Wildfire Likelihood0.04% annual chance
ExposureIndirect
within 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 675 locations within half a mile, as of December 31, 2025

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

May also be available: Unwired.

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