511 W 5th St, Antioch, CA 94509 Property Records

Contra Costa County property record for 511 W 5th St, Antioch, CA 94509

Property Summary

Property Type	Duplex
Details	4 bd · 2 ba · 1,772 sqft · built 1968
Lot Size	0.115 acres (5,000 sqft)
Owner	2 Individual Names on File
Last Sale	$340,000 (May 2017)
Tax Bill	$5,529 (2025)
Deeds & Mortgages	Apr 2024 Line of Credit Jul 2020 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`066-147-011-2`

Property Details

APN / Parcel Number

Primary APN	`066-147-011-2`
Alternative APN	`066-147-011`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	10 Rooms
Stories	1 Story
Building Area	1,772 sqft Living Area
1st Floor Area	1,772 sqft

Exterior

Year Built	Built 1968
Effective Year Built	Effective 1980
Architectural Style	Duplex Single
Lot Area	5,000 sqft (0.115 acres)
Garage Type	Attached
Garage Area	360 sqft
Parking Spaces	1 Parking Space

Location & Zoning

Street Address	511 W 5TH ST
City	ANTIOCH
State	CA
Zip	94509-1235
Property Category	Residential
Property Type	Residential > Multi-Unit > Duplex
Local Zoning Code	C2
Legal Description	TOWN OF ANTIOCH LOT 3 BLK 31
Legal Subdivision	ANTIOCH
Legal Block	31
Legal Lot Number	3
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	3
Census Block	3051
Census Tract	305000

Owner

511 W 5th St, a duplex, is owned by two individuals who bought it in May 2017.

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

Owner of Record	2 Individual Names on File
Mailing Address	2302 CARLMONT DR, 3, BELMONT, CA 94002-3304
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
Apr 29, 2024	Deed of Trust, Mortgage · Line of Credit FIRST TECHNOLOGY FEDERAL CU
Jul 29, 2020	Intrafamily Transfer, Transfer · Conventional Mortgage ALAMEDA MORTGAGE CORP
May 31, 2017	Grant Deed, Transfer · Conventional Mortgage ALAMEDA MORTGAGE CORP

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 31, 2017 · Amount on File
Deed Sale	May 31, 2017 · Amount on File
Prior Sale	Nov 14, 2014 · Amount on File
Deed Document Number	201796865
Prior Transfer Date	Jul 30, 1996
Prior Transfer Doc	0000154752
Record Updated	Oct 29, 2026

April 2024: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	511 W 5TH ST, ANTIOCH, CA 94509-1235
Transaction Type	Mortgage
Record Updated	May 8, 2024
Title Company	WFG LENDER SERVICES

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1024 CEDARWOOD LOOP, SAN RAMON, CA 94582-3060

Mortgage

Document Number	0000039492
Date	Apr 29, 2024
Instrument	2024-039492

Lender

Name	FIRST TECHNOLOGY FEDERAL CU
Type	Credit Union
Address	HILLSBORO, OR 97124

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	300 Months
Due	Apr 25, 2049

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

July 2020: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 29, 2020
Property Address	511 W 5TH ST, ANTIOCH, CA 94509-1235
Document Number	0000156045
Instrument Date	Jul 21, 2020
Instrument	2020-156045
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	CHICAGO TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	2302 CARLMONT DR APT 3, 3, BELMONT, CA 94002-3304

Mortgage

Document Number	0000156046
Date	Jul 29, 2020
Instrument	2020-156046

Lender

Name	ALAMEDA MORTGAGE CORP
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Aug 1, 2050

May 2017: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	May 31, 2017
Property Address	511 W 5TH ST, ANTIOCH, CA 94509-1235
Document Number	0000096865
Instrument Date	May 26, 2017
Instrument	2017-096865
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
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
Address	511 W 5TH ST, ANTIOCH, CA 94509-1235

Mortgage

Document Number	0000096866
Date	May 31, 2017
Instrument	2017-096866

Lender

Name	ALAMEDA MORTGAGE CORP
Type	Mortgage Company

Agreement

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

Tax Assessment & Valuation

The 2025 property tax bill for 511 W 5th St was $5,529.

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		$402,485 (+2%) Land $189,405 Building $213,080
2025	$5,529.00	$394,594 Land $185,692 Building $208,902
2023	$5,216.00 (+1.42%)	$379,273 Land $178,482 Building $200,791
2022	$5,143.00

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

Flood

FEMA maps place 511 W 5th St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2017.

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	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 511 W 5th 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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