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

Contra Costa County property record for 500 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	0.186 acres (8,100 sqft)
Owner	Individual Name on File
Last Sale	$427,500 (Jul 2020)
Tax Bill	$5,672 (2025)
Deeds & Mortgages	Jul 2020 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`067-231-013-3`

Property Details

APN / Parcel Number

Primary APN	`067-231-013-3`
Alternative APN	`067-231-013`

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	Stucco
Construction Type	Frame
Roof Material	Tile
Lot Area	8,100 sqft (0.186 acres)
Lot Dimensions	142 ft deep x 62 ft wide
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	500 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 7
Legal Subdivision	DAUENHAVER
Legal Tract	4187
Legal Lot Number	7
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	2
Census Block	2013
Census Tract	305000

Owner

500 W 20th St is owned and occupied by an individual who bought it in July 2020.

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

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on File
Mailing Address	500 W 20TH ST, ANTIOCH, CA 94509-2516
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jul 13, 2020 · Amount on File
Deed Sale	Jul 13, 2020 · Amount on File
Deed Document Number	2020138777
Record Updated	Oct 29, 2026

July 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 13, 2020
Property Address	500 W 20TH ST, ANTIOCH, CA 94509-2516
Document Number	0000138777
Map Reference	MB 193 PG 4
Instrument Date	Jul 8, 2020
Instrument	2020-138777
Transaction Type	Transfer
Record Updated	Jul 27, 2021
Title Company	CHICAGO 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	500 W 20TH ST, ANTIOCH, CA 94509-2516

Mortgage

Document Number	0000138778
Date	Jul 13, 2020
Instrument	2020-138778

Lender

Name	PRIMARY RESIDENTIAL MORTGAGE INC
Type	Mortgage Company

Agreement

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

Tax Assessment & Valuation

The 2025 property tax bill for 500 W 20th St was $5,672 with a homeowner's exemption.

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		$471,991 (+2%) Land $292,580 Building $179,411
2025	$5,672.00 Homeowner's exemption	$462,738 Land $286,844 Building $175,894
2023	$5,393.00 (+1.62%) Homeowner's exemption	$444,771 Land $275,706 Building $169,065
2022	$5,307.00

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

Flood

FEMA maps place 500 W 20th St in Zone X, an area of minimal flood risk.

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

Wildfire risk around 500 W 20th 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 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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