4127 Mt Isabel Rd, Antioch, CA 94531 Property Records

Contra Costa County property record for 4127 Mt Isabel Rd, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,179 sqft · built 2001
Lot Size	0.118 acres (5,156 sqft)
Owner	2 Individual Names on Record
Last Sale	$530,000 (Nov 2020)
Tax Bill	$9,133 (2025)
Deeds & Mortgages	Apr 2026 Line of Credit Nov 2020 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`055-650-015-5`

Property Details

APN / Parcel Number

Primary APN	`055-650-015-5`
Alternative APN	`055-650-015`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,179 sqft Living Area
1st Floor Area	1,075 sqft
2nd Floor Area	1,104 sqft

Exterior

Year Built	Built 2001
Effective Year Built	Effective 2001
Lot Area	5,156 sqft (0.118 acres)
Garage Type	Attached
Garage Area	514 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	4127 MOUNT ISABEL RD
City	ANTIOCH
State	CA
Zip	94531-9107
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T8410 L90
Legal Subdivision	SUBDIVISION 8410
Legal Tract	8410
Legal Lot Number	90
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	TASSAJARA
Census Block Group	1
Census Block	1002
Census Tract	355118

Owner

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

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on Record
Mailing Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Apr 24, 2026	Deed of Trust, Mortgage · Line of Credit COASTAL COMMUNITY BANK
Nov 24, 2020	Grant Deed, Transfer · Conventional Mortgage SIERRA PACIFIC MORTGAGE CO INC
Apr 20, 2018	Grant Deed, Transfer · Conventional Mortgage SIERRA PACIFIC MORTGAGE CO INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Nov 24, 2020 · Amount on Record
Deed Sale	Nov 24, 2020 · Amount on Record
Prior Sale	Apr 20, 2018 · Amount on Record
Deed Document Number	2020286998
Record Updated	Oct 29, 2026

April 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Recording Date	Apr 24, 2026
Property Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107
Document Number	0000042085
Instrument Date	Mar 26, 2026
Instrument	202642085
Transaction Type	Mortgage
Record Updated	Jul 12, 2026
Title Company	NONE LISTED ON DOCUMENT

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107

Mortgage

Document Number	0000042085,
Date	Apr 24, 2026
Instrument	202642085

Lender

Name	COASTAL COMMUNITY BANK

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Rate	5.98%
Initial Type	Adjustable Rate
Adjustable	Adjustable Rate Rider
Max Rate	-1%

November 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 24, 2020
Property Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107
Document Number	0000286998
Map Reference	MB 424 PG 45
Instrument Date	Nov 18, 2020
Instrument	2020-286998
Transaction Type	Transfer
Record Updated	Jul 27, 2021
Title Company	CHICAGO TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107

Mortgage

Document Number	0000286999
Date	Nov 24, 2020
Instrument	2020-286999

Lender

Name	SIERRA PACIFIC MORTGAGE CO INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Dec 1, 2050

April 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Apr 20, 2018
Property Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107
Document Number	0000061533
Map Reference	MB 424 PG 45
Instrument Date	Apr 10, 2018
Instrument	2018-061533
Transaction Type	Transfer
Record Updated	Jul 27, 2021
Title Company	LAWYERS TITLE INSURANCE COMP

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Notice of Trustee Sale Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	4127 MOUNT ISABEL RD, ANTIOCH, CA 94531-9107

Mortgage

Document Number	0000061534
Date	Apr 20, 2018
Instrument	2018-061534

Lender

Name	SIERRA PACIFIC MORTGAGE CO INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2048

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Antioch City
Unified School District	Antioch Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$585,159 (+2%) Land $220,814 Building $364,345
2025	$9,133.00 (+4.38%) Homeowner's exemption	$573,686 (+4.04%) Land $216,485 Building $357,201
2023	$8,750.00 (+1.26%) Homeowner's exemption	$551,412 Land $208,080 Building $343,332
2022	$8,641.00

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

Flood

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

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

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

Wildfire

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

Wildfire Risk	Low lower than 67% of the US · lower than 81% of California
Wildfire Likelihood	0.04% annual chance
Exposure	Indirect 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 System	CITY OF ANTIOCH serves 116,781 people · EPA ID CA0710001
Water Source	Surface water
Last State Inspection	Jan 2024
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None 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

Provider	Max 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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