3107 Lone Tree Way, #A, Antioch, CA 94509 Property Records

Contra Costa County property record for 3107 Lone Tree Way, #A, Antioch, CA 94509

Property Summary

Property Type	Medical Building
Details	4,890 sqft · built 1970
Lot Size	0.53 acres (23,086 sqft)
Owner	Company Name on File
Last Sale	$1,000,000 (Jun 2017)
Tax Bill	$12,248 (2025)
Deeds & Mortgages	Dec 2022 Second Mortgage Aug 2021 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`071-080-012-9`

Property Details

APN / Parcel Number

Primary APN	`071-080-012-9`
Alternative APN	`071-080-012`

Interior

Total Rooms	1 Room
Stories	1 Story
Building Area	4,890 sqft Gross Area
1st Floor Area	4,890 sqft

Exterior

Year Built	Built 1970
Effective Year Built	Effective 1970
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Tar & Gravel
Lot Area	23,086 sqft (0.53 acres)
Lot Dimensions	153 ft deep x 151 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Street Address	3107 LONE TREE WAY, A
City	ANTIOCH
State	CA
Zip	94509-4959
Property Category	Commercial
Property Type	Commercial > Office > Medical Building
Legal Description	PARCEL MAP 25 PG 26 PCL 2 EX 1/2 MR
Legal Subdivision	CITY/ANTIOCH
Legal Tract	25PM26
Legal Lot Number	2
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	4
Census Block	4002
Census Tract	308001

Owner

Source: Contra Costa County assessment roll, 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	Company Name on File
Mailing Address	3107 LONE TREE WAY, A, ANTIOCH, CA 94509-4959
Owner Type	Company
Vesting	Limited Liability Partnership

Deeds, Mortgages & Sale History

Date	Document
Dec 30, 2022	Deed of Trust, Mortgage · Stand-Alone Second Mortgage BANK OF GUAM
Aug 20, 2021	Deed of Trust, Mortgage · Commercial Mortgage TASI BANK DIVISION OF BANK OF GUAM
Jun 15, 2017	Grant Deed, Transfer BANK OF GUAM

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Jun 15, 2017 · Amount on Record
Deed Sale	Jun 15, 2017 · Amount on Record
Prior Sale	Jun 28, 2013 · Amount on Record
Deed Document Number	2017106912
Last Transfer Date	Dec 30, 2024
Transfer Doc	0000005024
Record Updated	Sep 20, 2026

December 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	3107 LONE TREE WAY STE A, A, ANTIOCH, CA 94509-4959
Transaction Type	Mortgage
Record Updated	Sep 28, 2023
Title Company	ACCOMODATION, ACCOMMODATION

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2633 CAMINO RAMON 455, 455, SAN RAMON, CA 94583-9149

Mortgage

Document Number	0000189658
Date	Dec 30, 2022
Instrument	2022-189658

Lender

Name	BANK OF GUAM
Type	Bank
Address	SAN FRANCISCO, CA 94104

Agreement

Type	Stand-Alone Second Mortgage
Amount	Amount Recorded

August 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	3107 LONE TREE WAY STE A, A, ANTIOCH, CA 94509-4959
Transaction Type	Mortgage
Record Updated	Sep 28, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2633 CAMINO RAMON 455, 455, SAN RAMON, CA 94583-9149

Mortgage

Document Number	0000232283
Date	Aug 20, 2021
Instrument	2021-232283

Lender

Name	TASI BANK DIVISION OF BANK OF GUAM
Type	Non-Lending Institution
Address	SAN FRANCISCO, CA 94104

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate

June 2017: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 15, 2017
Property Address	3107 LONE TREE WAY STE A, A, ANTIOCH, CA 94509-4959
Document Number	0000106912
Instrument Date	Jun 12, 2017
Instrument	106912
Transaction Type	Transfer
Record Updated	Jun 26, 2017
Title Company	OLD REPUBLIC TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$1,100.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	6111 JOHNSON CT #200 PLEASANTON CA 945883331, 200, PLEASANTON, CA 94588-3331

Mortgage

Document Number	106913
Date	Jun 15, 2017
Instrument	106913

Lender

Name	BANK OF GUAM
Type	Bank
Address	SAN FRANCISCO, CA 94104

Agreement

Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate

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		$964,788 (+2%) Land $532,705 Building $432,083
2025	$12,248.00 (+5.59%)	$945,871 (+4.04%) Land $522,260 Building $423,611
2023	$11,600.00 (+1.53%)	$909,143 Land $501,981 Building $407,162
2022	$11,425.00

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 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond ember reach

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 489 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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