4538 Half Dome St, Antioch, CA 94531 Property Records

Contra Costa County property record for 4538 Half Dome St, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	5 bd · 3.5 ba · 3,438 sqft · built 2014
Lot Size	0.149 acres (6,497 sqft)
Owner	2 Individual Names on File
Last Sale	$500,000 (Mar 2015)
Tax Bill	$7,506 (2025)
Deeds & Mortgages	Sep 2023 Second Mortgage Jan 2021 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`052-550-011-2`

Property Details

APN / Parcel Number

Primary APN	`052-550-011-2`
Alternative APN	`052-550-011`

Interior

Bedrooms	5 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	13 Rooms
Stories	2 Stories
Building Area	3,438 sqft Living Area
1st Floor Area	1,793 sqft
2nd Floor Area	1,645 sqft

Exterior

Year Built	Built 2014
Effective Year Built	Effective 2015
Lot Area	6,497 sqft (0.149 acres)
Garage Type	Attached
Garage Area	463 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	4538 HALF DOME ST
City	ANTIOCH
State	CA
Zip	94531-7189
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T8851 L285
Legal Subdivision	NELSON RANCH 3 SUB 8851
Legal Tract	8851
Legal Lot Number	285
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	1
Census Block	1008
Census Tract	308002

Owner

4538 Half Dome St is owned and occupied by two individuals who bought it in March 2015.

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

Owner of Record	2 Individual Names on File
Mailing Address	4538 HALF DOME ST, ANTIOCH, CA 94531-7189
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

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

Date	Document
Sep 18, 2023	Deed of Trust, Mortgage · Stand-Alone Second Mortgage PATELCO CU
Jan 4, 2021	Deed of Trust, Mortgage · Conventional Mortgage FREEDOM MORTGAGE CORP
Aug 3, 2020	Deed of Trust, Mortgage · Conventional Mortgage WILMINGTON TR NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Mar 31, 2015 · Amount on File
Deed Sale	Mar 31, 2015 · Amount on File
Deed Document Number	201557925
Record Updated	Sep 20, 2026

September 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4538 HALF DOME ST, ANTIOCH, CA 94531-7189
Transaction Type	Mortgage
Record Updated	Sep 29, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4538 HALF DOME ST, ANTIOCH, CA 94531-7189

Mortgage

Document Number	0000090260
Date	Sep 18, 2023
Instrument	2023-090260

Lender

Name	PATELCO CU
Type	Credit Union
Address	DUBLIN, CA 94568

Agreement

Type	Stand-Alone Second Mortgage
Amount	Amount on Record
Term	121 Months
Due	Oct 1, 2033

January 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4538 HALF DOME ST, ANTIOCH, CA 94531-7189
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	TITLE CONNECT INC SANTA ANA

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4538 HALF DOME ST, ANTIOCH, CA 94531-7189

Mortgage

Document Number	0000000667
Date	Jan 4, 2021
Instrument	2021-000667

Lender

Name	FREEDOM MORTGAGE CORP
Type	Subprime Lender
Address	MOUNT LAUREL, NJ 08054

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	292 Months
Due	May 1, 2045

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4538 HALF DOME ST, ANTIOCH, CA 94531-7189
Document Number	0000165032
Instrument Date	Aug 3, 2020
Transaction Type	Mortgage
Record Updated	Aug 26, 2020
Title Company	NOT AVAILABLE

Transaction

Additional	Multiple Parcels

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	90 MATAWAN RD #5TH MATAWAN NJ 077472623, 5TH, MATAWAN, NJ 07747-2623
Investor	Possibly a Property Investor

Mortgage

Document Number	0000165032
Date	Aug 7, 2020
Instrument	165032

Lender

Name	WILMINGTON TR NA
Address	WILMINGTON, DE 19890-1600

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	60 Months
Due	Aug 6, 2025

Tax Assessment & Valuation

The 2025 property tax bill for 4538 Half Dome St was $7,506.

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		$612,931 (+2%) Land $85,806 Building $527,125
2025	$7,506.00	$600,914 Land $84,124 Building $516,790
2023	$7,162.00 (+1.57%)	$577,581 Land $80,858 Building $496,723
2022	$7,051.00

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

Flood

FEMA maps place 4538 Half Dome St in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	2 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Wildfire risk around 4538 Half Dome St is low, with less than a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 99.8% of the US · lower than 99.8% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None 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 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 550 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T.

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