509 Gary Ave, Antioch, CA 94509 Property Records

Contra Costa County property record for 509 Gary Ave, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,642 sqft · built 1952
Lot Size	0.134 acres (5,850 sqft)
Owner	Company Name on File
Last Sale	$147,500 (Apr 2010)
Tax Bill	$2,705 (2025)
Deeds & Mortgages	Oct 2018 Line of Credit Nov 2020 Mortgage + 3 more
Flood Zone	Zone X (minimal risk)
APN	`068-074-021-4`

Property Details

APN / Parcel Number

Primary APN	`068-074-021-4`
Alternative APN	`068-074-021`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,642 sqft Living Area
Gross Area	2,056 sqft
1st Floor Area	1,642 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1952
Effective Year Built	Effective 1965
Exterior Material	Block
Construction Type	Frame
Lot Area	5,850 sqft (0.134 acres)
Garage Type	Attached
Garage Area	414 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

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

Location & Zoning

Street Address	509 GARY AVE
City	ANTIOCH
State	CA
Zip	94509-2723
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	LYNNWOOD ESTATES LOT 17
Legal Subdivision	LYNNWOOD ESTATES
Legal Lot Number	17
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	3
Census Block	3001
Census Tract	306003

Owner

509 Gary Ave is owned by a company that bought it in April 2010.

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

Owner of Record	Company Name on File
Mailing Address	509 GARY AVE, ANTIOCH, CA 94509-2723
Owner Type	Company

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 12, 2018	Deed of Trust, Mortgage · Line of Credit PATELCO CU
Nov 23, 2020	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LOANS LLC
Oct 6, 2021	Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC
Aug 17, 2022	Deed of Trust, Mortgage · Stand-Alone Second Mortgage DISCOVER BANK
Aug 6, 2020	Deed of Trust, Mortgage · FHA Mortgage HUD-HOUSING/URBAN DEV

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Apr 9, 2010 · Amount on File
Deed Sale	Apr 9, 2010 · Amount on File
Prior Sale	Jun 22, 2009 · Amount on File
Deed Document Number	201070299
Record Updated	Oct 29, 2026

October 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	509 GARY AVE, ANTIOCH, CA 94509-2723
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	PLACER TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000162426
Date	Oct 12, 2018
Instrument	2018-162426

Lender

Name	PATELCO CU
Type	Credit Union
Address	PLEASANTON, CA 94588

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	302 Months
Due	Nov 30, 2043

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

November 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	509 GARY AVE, ANTIOCH, CA 94509-2723
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	509 GARY AVE, ANTIOCH, CA 94509-2723

Mortgage

Document Number	0000284505
Date	Nov 23, 2020
Instrument	2020-284505

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	359 Months
Due	Oct 1, 2050

October 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	509 GARY AVE, ANTIOCH, CA 94509-2723
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	509 GARY AVE, ANTIOCH, CA 94509-2723

Mortgage

Document Number	0000275849
Date	Oct 6, 2021
Instrument	2021-275849

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Oct 1, 2051

August 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	509 GARY AVE, ANTIOCH, CA 94509-2723
Transaction Type	Mortgage
Record Updated	Nov 3, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	509 GARY AVE, ANTIOCH, CA 94509-2723

Mortgage

Document Number	0000127782
Date	Aug 17, 2022
Instrument	2022-127782

Lender

Name	DISCOVER BANK
Type	Bank
Address	GREENWOOD, DE 19950

Agreement

Type	Stand-Alone Second Mortgage
Amount	Amount on Record
Term	360 Months
Due	Aug 11, 2052

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	509 GARY AVE, ANTIOCH, CA 94509-2723
Document Number	0000176529
Instrument Date	Aug 6, 2020
Transaction Type	Mortgage
Record Updated	Aug 31, 2020
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	509 GARY AVE ANTIOCH CA 945092723, ANTIOCH, CA 94509-2723

Mortgage

Document Number	0000176529
Date	Aug 20, 2020
Instrument	176529

Lender

Name	HUD-HOUSING/URBAN DEV
Address	451 7TH ST SW, WASHINGTON, DC 20410-0001

Agreement

Type	FHA Mortgage
Amount	Amount on Record
Term	300 Months
Due	Aug 19, 2045

Tax Assessment & Valuation

The 2025 property tax bill for 509 Gary Ave was $2,705.

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		$194,186 (+2%) Land $98,739 Building $95,447
2025	$2,705.00	$190,379 Land $96,803 Building $93,576
2023	$2,474.00 (+1.48%) Homeowner's exemption	$182,989 Land $93,045 Building $89,944
2022	$2,438.00

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

Flood

FEMA maps place 509 Gary Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1998.

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	1 in force
Nearby Flood Claims	1 (1998)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Feb 1998 · Severe Winter Storms And Flooding

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 509 Gary Ave 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 741 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: Verizon.

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