4105 Rockford Dr, Antioch, CA 94509 Property Records

Contra Costa County property record for 4105 Rockford Dr, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,046 sqft · built 1988
Lot Size	0.145 acres (6,298 sqft)
Owner	Company Name on File
Last Sale	$190,000 (Sep 2012)
Tax Bill	$3,227 (2025)
Deeds & Mortgages	Nov 2023 Sale Dec 2017 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`072-301-013-8`

Property Details

APN / Parcel Number

Primary APN	`072-301-013-8`
Alternative APN	`072-301-013`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,046 sqft Living Area
1st Floor Area	1,064 sqft
2nd Floor Area	982 sqft

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Lot Area	6,298 sqft (0.145 acres)
Garage Type	Attached
Garage Area	480 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	4105 ROCKFORD DR
City	ANTIOCH
State	CA
Zip	94509-6972
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	T6164A L0409 B
Legal Subdivision	CALIHOMA SUB
Legal Tract	6164A
Legal Lot Number	0409
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	4
Census Block	4001
Census Tract	355109

Owner

4105 Rockford Dr is owned by a company that bought it in September 2012.

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

Owner of Record	Company Name on File
Mailing Address	345 PARK AVE, NEW YORK, NY 10154-0023
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
Nov 30, 2023	Grant Deed, Transfer OS NATIONAL LLC
Dec 21, 2017	Quit Claim Deed, Transfer GERMAN AM CAP

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 13, 2012 · Amount on File
Deed Sale	Sep 13, 2012 · Amount on File
Prior Sale	Dec 31, 2003 · Amount on File
Deed Document Number	2012223452
Prior Transfer Date	Sep 7, 2012
Prior Transfer Doc	0000223451
Record Updated	Oct 29, 2026

November 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 30, 2023
Property Address	4105 ROCKFORD DR, ANTIOCH, CA 94509-6972
Document Number	0000126997
Map Reference	MB 284 PG 43
Instrument Date	Nov 29, 2023
Instrument	2023-126997
Transaction Type	Transfer
Record Updated	Dec 13, 2023
Title Company	OS NATIONAL LLC

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	15771 RED HILL AVE STE 100, 100, TUSTIN, CA 92780-7333
Investor	Possibly a Property Investor

December 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Dec 21, 2017
Property Address	4105 ROCKFORD DR, ANTIOCH, CA 94509-6972
Document Number	0000239763
Instrument Date	Dec 20, 2017
Instrument	239763
Transaction Type	Transfer
Record Updated	Aug 29, 2018
Title Company	OS NATIONAL LLC

Transaction

Tax	$0.00
Additional	Quitclaim Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	1508 BROOKHOLLOW DR SANTA ANA CA 927055433, SANTA ANA, CA 92705-5433
Investor	Possibly a Property Investor

Mortgage

Document Number	239764
Date	Dec 21, 2017
Instrument	239764

Lender

Name	GERMAN AM CAP
Type	Funding / Finance Company
Address	60 WALL ST # 10TH, NEW YORK, NY 10005-2836

Agreement

Amount	Amount on Record

Tax Assessment & Valuation

The 2025 property tax bill for 4105 Rockford Dr was $3,227.

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		$650,250 (+177.94%) Land $197,676 Building $452,574
2025	$3,227.00	$233,957 Land $44,325 Building $189,632
2023	$3,053.00 (+1.43%)	$224,873 Land $42,604 Building $182,269
2022	$3,010.00

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

Flood

FEMA maps place 4105 Rockford 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 4105 Rockford 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 645 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	100 / 20

May also be available: Verizon.

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