304 W 4th St, Antioch, CA 94509 Property Records

Contra Costa County property record for 304 W 4th St, Antioch, CA 94509

Property Summary

Property Type	Duplex
Details	2 bd · 2 ba · 1,511 sqft · built 1952
Lot Size	0.115 acres (5,000 sqft)
Owner	Individual Name on File
Last Sale	$235,000 (Nov 2013)
Tax Bill	$4,337 (2025)
Deeds & Mortgages	Mar 2017 Mortgage Nov 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`066-058-002-8`

Property Details

APN / Parcel Number

Primary APN	`066-058-002-8`
Alternative APN	`066-058-002`

Interior

Bedrooms	2 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,511 sqft Living Area
1st Floor Area	1,511 sqft

Exterior

Year Built	Built 1952
Effective Year Built	Effective 1952
Architectural Style	Duplex Single
Lot Area	5,000 sqft (0.115 acres)
Garage Type	Attached
Garage Area	465 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	304 W 4TH ST
City	ANTIOCH
State	CA
Zip	94509-1243
Property Category	Residential
Property Type	Residential > Multi-Unit > Duplex
Local Zoning Code	R2
Legal Description	TOWN OF ANTIOCH LOT 11 BLK 59
Legal Subdivision	ANTIOCH
Legal Block	59
Legal Lot Number	11
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	3
Census Block	3025
Census Tract	305000

Owner

304 W 4th St, a duplex, is owned by an individual who bought it in November 2013.

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

Owner of Record	Individual Name on File
Mailing Address	135 11TH AVE, SAN MATEO, CA 94401-4310
Owner Type	Individual

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
Mar 30, 2017	Deed of Trust, Mortgage · Conventional Mortgage SAFE CU
Nov 30, 2021	Deed of Trust, Mortgage · Conventional Mortgage HOMEBRIDGE FINANCIAL SERVICES INC

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Nov 8, 2013 · Amount on File
Deed Sale	Nov 8, 2013 · Amount on File
Prior Sale	Oct 5, 2009 · Amount on File
Deed Document Number	2013266016
Prior Transfer Date	Jun 29, 2011
Prior Transfer Doc	0000134478
Record Updated	Oct 29, 2026

March 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	304 W 4TH ST, ANTIOCH, CA 94509-1243
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	ORT ORINDA

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000055458
Date	Mar 30, 2017
Instrument	2017-055458

Lender

Name	SAFE CU
Type	Credit Union
Address	FOLSOM, CA 95630

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Apr 1, 2047

November 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	304 W 4TH ST, ANTIOCH, CA 94509-1243
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	FIRST AMERICAN MORTGAGE SLN

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	135 11TH AVE, SAN MATEO, CA 94401-4310

Mortgage

Document Number	0000327219
Date	Nov 30, 2021
Instrument	2021-327219

Lender

Name	HOMEBRIDGE FINANCIAL SERVICES INC
Type	Mortgage Company
Address	ISELIN, NJ 08830

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Dec 1, 2051

Tax Assessment & Valuation

The 2025 property tax bill for 304 W 4th St was $4,337.

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		$293,827 (+2%) Land $87,520 Building $206,307
2025	$4,337.00	$288,066 Land $85,804 Building $202,262
2023	$4,073.00 (+1.32%)	$276,882 Land $82,473 Building $194,409
2022	$4,020.00

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

Flood

FEMA maps place 304 W 4th St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	5 in force
Nearby Flood Claims	1 (2017)
Most Recent Claim	Feb 2017 · Severe Winter Storms, Flooding, And Mudslides

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

The area around 304 W 4th St has no burnable land within ember reach, so its wildfire risk is not rated.

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

Wildfire Risk	Not rated no burnable land 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 374 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
Unwired Fixed Wireless	300 / 25

May also be available: T-Mobile, Verizon.

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