2016 Thumb Mountain Ct, Antioch, CA 94531 Property Records

Contra Costa County property record for 2016 Thumb Mountain Ct, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,260 sqft · built 1991
Lot Size	0.321 acres (14,000 sqft)
Owner	Individual Name on Record
Last Sale	$250,000 (Oct 2009)
Tax Bill	$3,941 (2025)
Deeds & Mortgages	Mar 2022 Line of Credit May 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`055-020-020-8`

Property Details

APN / Parcel Number

Primary APN	`055-020-020-8`
Alternative APN	`055-020-020`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,260 sqft Living Area
1st Floor Area	1,137 sqft
2nd Floor Area	1,123 sqft

Exterior

Year Built	Built 1991
Effective Year Built	Effective 1991
Lot Area	14,000 sqft (0.321 acres)
Garage Type	Attached
Garage Area	715 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	2016 THUMB MOUNTAIN CT
City	ANTIOCH
State	CA
Zip	94531-8329
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T7201 L20
Legal Subdivision	MAP SUB 7201
Legal Tract	7201
Legal Lot Number	20
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	TASSAJARA
Census Block Group	1
Census Block	1006
Census Tract	355120

Owner

Source: Contra Costa County records, 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	Individual Name on Record
Mailing Address	2016 THUMB MOUNTAIN CT, ANTIOCH, CA 94531-8329
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Mar 7, 2022	Deed of Trust, Mortgage · Line of Credit NAVY FCU
May 20, 2020	Intrafamily Transfer, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 27, 2009 · Amount on Record
Deed Sale	Oct 27, 2009 · Amount on Record
Deed Document Number	2009255686
Prior Transfer Date	Jan 5, 1996
Prior Transfer Doc	0000020962
Record Updated	Oct 29, 2026

March 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	2016 THUMB MOUNTAIN CT, ANTIOCH, CA 94531-8329
Transaction Type	Mortgage
Record Updated	Nov 3, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2016 THUMB MOUNTAIN CT, ANTIOCH, CA 94531-8329

Mortgage

Document Number	0000040970
Date	Mar 7, 2022
Instrument	2022-040970

Lender

Name	NAVY FCU
Type	Credit Union
Address	VIENNA, VA 22180

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	480 Months
Due	Mar 1, 2062

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

May 2020: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	May 20, 2020
Property Address	2016 THUMB MOUNTAIN CT, ANTIOCH, CA 94531-8329
Document Number	0000096224
Map Reference	MB 354 PG 40
Instrument Date	May 14, 2020
Instrument	2020-096224
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2016 THUMB MOUNTAIN CT, ANTIOCH, CA 94531-8329

Mortgage

Document Number	0000096225
Date	May 20, 2020
Instrument	2020-096225

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2050

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		$329,143 (+2%) Land $43,440 Building $285,703
2025	$3,941.00 (+6.6%) Homeowner's exemption	$322,690 (+4.04%) Land $42,589 Building $280,101
2023	$3,697.00 (+1.54%) Homeowner's exemption	$310,161 Land $40,936 Building $269,225
2022	$3,641.00

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 94% of the US · lower than 96% 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 753 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: Verizon.

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