508 W 20th St, Antioch, CA 94509 Property Records

Contra Costa County property record for 508 W 20th St, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,201 sqft · built 1977
Lot Size	0.142 acres (6,180 sqft)
Owner	Individual Name on Record
Last Sale	$127,000 (Dec 2010)
Tax Bill	$2,395 (2025)
Deeds & Mortgages	Mar 2017 Mortgage Sep 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`067-231-015-8`

Property Details

APN / Parcel Number

Primary APN	`067-231-015-8`
Alternative APN	`067-231-015`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,201 sqft Living Area
Gross Area	1,705 sqft
1st Floor Area	1,201 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1978
Architectural Style	Ranch
Exterior Material	Wood
Construction Type	Frame
Roof Material	Tile
Lot Area	6,180 sqft (0.142 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	508 W 20TH ST
City	ANTIOCH
State	CA
Zip	94509-2516
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R2
Legal Description	TRACT 4187 LOT 9
Legal Subdivision	SUBDIVISION 4187
Legal Tract	4187
Legal Lot Number	9
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	2
Census Block	2013
Census Tract	305000

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	Individual Name on Record
Mailing Address	508 W 20TH ST, ANTIOCH, CA 94509-2516
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Single Person

Deeds, Mortgages & Sale History

Date	Document
Mar 31, 2017	Deed of Trust, Mortgage · Conventional Mortgage FINANCE OF AMERICA MORTGAGE LLC
Sep 30, 2021	Deed of Trust, Mortgage · Conventional Mortgage PATELCO CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 22, 2010 · Amount on Record
Deed Sale	Dec 22, 2010 · Amount on Record
Prior Sale	Oct 13, 2010 · Amount on Record
Deed Document Number	2010290020
Prior Transfer Date	Dec 17, 2010
Prior Transfer Doc	0000290021
Record Updated	Sep 20, 2026

March 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	508 W 20TH ST, ANTIOCH, CA 94509-2516
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	FIRST AMERICAN TITLE CO

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000056745
Date	Mar 31, 2017
Instrument	2017-056745

Lender

Name	FINANCE OF AMERICA MORTGAGE LLC
Type	Mortgage Company
Address	ROSEVILLE, CA 95661

Agreement

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

September 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	508 W 20TH ST, ANTIOCH, CA 94509-2516
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	PLACER TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	508 W 20TH ST, ANTIOCH, CA 94509-2516

Mortgage

Document Number	0000271870
Date	Sep 30, 2021
Instrument	2021-271870

Lender

Name	PATELCO CU
Type	Credit Union
Address	DUBLIN, CA 94568

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Oct 1, 2051

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		$165,951 (+2%) Land $39,198 Building $126,753
2025	$2,395.00 (+6.26%)	$162,698 (+4.04%) Land $38,430 Building $124,268
2023	$2,254.00 (+1.35%)	$156,383 Land $36,939 Building $119,444
2022	$2,224.00

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 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 754 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, 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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