300 Greystone Dr, Antioch, CA 94509 Property Records

Contra Costa County property record for 300 Greystone Dr, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,152 sqft · built 1990
Lot Size	0.425 acres (18,528 sqft)
Owner	2 Individual Names on File
Last Sale	$495,000 (Jan 2018)
Tax Bill	$6,907 (2025)
Deeds & Mortgages	Feb 2021 Mortgage Dec 2019 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`072-321-001-9`

Property Details

APN / Parcel Number

Primary APN	`072-321-001-9`
Alternative APN	`072-321-001`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,152 sqft Living Area
1st Floor Area	1,140 sqft
2nd Floor Area	1,012 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1990
Effective Year Built	Effective 1990
Exterior Material	Brick
Roof Material	Wood Shingle
Lot Area	18,528 sqft (0.425 acres)
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	300 GREYSTONE DR
City	ANTIOCH
State	CA
Zip	94509-6964
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	T6164B L0449 B
Legal Subdivision	SUBDIVISION 6164
Legal Tract	6164B
Legal Lot Number	0449
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	4
Census Block	4002
Census Tract	355109

Owner

300 Greystone Dr is owned by two individuals who bought it in January 2018.

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

Owner of Record	2 Individual Names on File
Mailing Address	1003 S MARY AVE, SUNNYVALE, CA 94087-1717
Owner Type	Individual
Vesting	Community Property

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
Feb 8, 2021	Deed of Trust, Mortgage · Conventional Mortgage GOOGAIN INC
Dec 12, 2019	Deed of Trust, Mortgage · Conventional Mortgage GOOGAIN
Jan 19, 2018	Grant Deed, Transfer · Conventional Mortgage GOOGAIN

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jan 19, 2018 · Amount on File
Deed Sale	Jan 19, 2018 · Amount on File
Prior Sale	Dec 29, 2015 · Amount on File
Deed Document Number	20188840
Prior Transfer Date	Dec 22, 2015
Prior Transfer Doc	0000266394
Record Updated	Oct 29, 2026

February 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	300 GREYSTONE DR, ANTIOCH, CA 94509-6964
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	FIRST AMERICAN TTL SANTA ANA

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1003 5 MARY AVE, 5, SUNNYVALE, CA 94087-1717

Mortgage

Document Number	0000036943
Date	Feb 8, 2021
Instrument	2021-036943

Lender

Name	GOOGAIN INC
Type	Mortgage Company
Address	SUNNYVALE, CA 94086

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	355 Months
Due	Sep 1, 2050

December 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	300 GREYSTONE DR, ANTIOCH, CA 94509-6964
Document Number	0000002269
Instrument Date	Dec 12, 2019
Transaction Type	Mortgage
Record Updated	Jan 20, 2020
Title Company	PREMIUM TITLE INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	1003 S MARY AVE SUNNYVALE CA 940871717, SUNNYVALE, CA 94087-1717

Mortgage

Document Number	0000002269
Date	Jan 6, 2020
Instrument	2269

Lender

Name	GOOGAIN
Address	SUNNYVALE, CA 94086

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jan 5, 2050

January 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jan 19, 2018
Property Address	300 GREYSTONE DR, ANTIOCH, CA 94509-6964
Document Number	0000008840
Instrument Date	Jan 10, 2018
Instrument	8840
Transaction Type	Transfer
Record Updated	Jan 24, 2018
Title Company	NORTH AMERICAN TITLE

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$544.50
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	1003 S MARY AVE SUNNYVALE CA 940871717, SUNNYVALE, CA 94087-1717

Mortgage

Document Number	8841
Date	Jan 19, 2018
Instrument	8841

Lender

Name	GOOGAIN
Address	SUNNYVALE, CA 94086

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jan 18, 2048

Tax Assessment & Valuation

The 2025 property tax bill for 300 Greystone Dr was $6,907.

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		$574,483 (+2%) Land $194,975 Building $379,508
2025	$6,907.00	$563,219 Land $191,152 Building $372,067
2023	$6,581.00 (+1.61%)	$541,350 Land $183,730 Building $357,620
2022	$6,477.00

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

Flood

FEMA maps place 300 Greystone Dr 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 300 Greystone Dr is low, with 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 80% of the US · lower than 88% of California
Wildfire Likelihood	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 484 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
AT&T DSL · Fiber, Fixed Wireless in parts of the area	100 / 20

May also be available: T-Mobile, Verizon.

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