4550 Half Dome St, Antioch, CA 94531 Property Records

Contra Costa County property record for 4550 Half Dome St, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	6 bd · 4.5 ba · 3,859 sqft · built 2014
Lot Size	0.218 acres (9,492 sqft)
Owner	2 Individual Names on File
Last Sale	$556,500 (Dec 2014)
Tax Bill	$8,184 (2025)
Deeds & Mortgages	Oct 2021 Mortgage Nov 2025 Line of Credit + 1 more
Flood Zone	Zone X (minimal risk)
APN	`052-550-008-8`

Property Details

APN / Parcel Number

Primary APN	`052-550-008-8`
Alternative APN	`052-550-008`

Interior

Bedrooms	6 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Total Rooms	13 Rooms
Stories	2 Stories
Building Area	3,859 sqft Living Area
1st Floor Area	2,095 sqft
2nd Floor Area	1,764 sqft

Exterior

Year Built	Built 2014
Effective Year Built	Effective 2014
Lot Area	9,492 sqft (0.218 acres)
Garage Type	Attached
Garage Area	799 sqft
Parking Spaces	3 Parking Spaces

Location & Zoning

Street Address	4550 HALF DOME ST
City	ANTIOCH
State	CA
Zip	94531-7189
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T8851 L282
Legal Subdivision	NELSON RANCH 3 SUB 8851
Legal Tract	8851
Legal Lot Number	282
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	1
Census Block	1008
Census Tract	308002

Owner

4550 Half Dome St is owned and occupied by two individuals who acquired it in October 2025.

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

Owner of Record	2 Individual Names on File
Mailing Address	4550 HALF DOME ST, ANTIOCH, CA 94531-7189
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Tenants in Common

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
Oct 6, 2021	Deed of Trust, Mortgage · FHA Mortgage CARRINGTON MORTGAGE SERVICES LLC
Nov 3, 2025	Intrafamily Transfer, Transfer · Line of Credit LENDAGE LLC
Aug 3, 2020	Deed of Trust, Mortgage · Conventional Mortgage WILMINGTON TR NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Dec 30, 2014 · Amount on File
Deed Sale	Dec 30, 2014 · Amount on File
Deed Document Number	2014230814
Last Transfer Date	Oct 16, 2025
Transfer Doc	0000123568
Record Updated	Sep 20, 2026

October 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4550 HALF DOME ST, ANTIOCH, CA 94531-7189
Transaction Type	Mortgage
Record Updated	Nov 13, 2025
Title Company	PRIOR TITLE, PRIORITY TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4550 HALF DOME ST, ANTIOCH, CA 94531-7189

Mortgage

Document Number	0000276849
Date	Oct 6, 2021
Instrument	2021-276849

Lender

Name	CARRINGTON MORTGAGE SERVICES LLC
Type	Mortgage Company
Address	DALLAS, TX 75243

Agreement

Type	FHA Mortgage
Amount	Amount on Record
Term	361 Months
Due	Nov 1, 2051

November 2025: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 3, 2025
Property Address	4550 HALF DOME ST, ANTIOCH, CA 94531-7189
Document Number	0000123568
Map Reference	MB 501 PG 20
Instrument Date	Oct 16, 2025
Instrument	2025- 123568
Transaction Type	Transfer
Record Updated	Nov 13, 2025
Title Company	ATLANTIS TITLE COMPANY, ATLAS TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Common
Address	4550 HALF DOME ST, ANTIOCH, CA 94531-7189

Mortgage

Document Number	0000123569
Date	Nov 3, 2025
Instrument	2025- 123569

Lender

Name	LENDAGE LLC
Type	Mortgage Company

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	180 Months
Due	Nov 1, 2040

Interest

Change Frequency	Monthly

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4550 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 4550 Half Dome St was $8,184.

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		$681,827 (+2%) Land $134,842 Building $546,985
2025	$8,184.00 Homeowner's exemption	$668,459 Land $132,199 Building $536,260
2023	$7,808.00 (+1.61%) Homeowner's exemption	$642,504 Land $127,066 Building $515,438
2022	$7,684.00

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

Flood

FEMA maps place 4550 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 4550 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 99.1% of the US · lower than 99.2% 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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