3717 Union Ct, Antioch, CA 94509 Property Records

Contra Costa County property record for 3717 Union Ct, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,024 sqft · built 1988
Lot Size	0.184 acres (8,008 sqft)
Owner	2 Company Names on Record
Last Sale	$435,000 (Feb 2017)
Tax Bill	$6,276 (2025)
Deeds & Mortgages	Feb 2017 Transfer Feb 2017 Sale + 1 more
Flood Zone	Zone X (minimal risk)
APN	`076-631-016-3`

Property Details

APN / Parcel Number

Primary APN	`076-631-016-3`
Alternative APN	`076-631-016`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	2,024 sqft Living Area
1st Floor Area	853 sqft
2nd Floor Area	1,171 sqft

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Lot Area	8,008 sqft (0.184 acres)
Garage Type	Attached
Garage Area	482 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	3717 UNION CT
City	ANTIOCH
State	CA
Zip	94509-7023
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T6812 L16
Legal Tract	6812
Legal Lot Number	16
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	4
Census Block	4007
Census Tract	307205

Owner

Source: Contra Costa County records, as of August 6, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	2 Company Names on Record
Mailing Address	4315 ARCADIA AVE, OAKLAND, CA 94602-1901
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Feb 6, 2017	Quit Claim Deed, Transfer OLD REPUBLIC TITLE
Feb 6, 2017	Grant Deed, Transfer OLD REPUBLIC TITLE
Feb 6, 2017	Quit Claim Deed, Transfer · Conventional Mortgage FREMONT BANK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Feb 6, 2017 · Amount on Record
Deed Sale	Feb 6, 2017 · Amount on Record
Prior Sale	May 19, 2011 · Amount on Record
Deed Document Number	201723240
Prior Transfer Date	Jan 25, 2017
Prior Transfer Doc	0000023239
Record Updated	Oct 29, 2026

February 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Feb 6, 2017
Property Address	3717 UNION CT, ANTIOCH, CA 94509-7023
Document Number	0000023239
Instrument Date	Jan 25, 2017
Instrument	23239
Transaction Type	Transfer
Record Updated	Feb 13, 2017
Title Company	OLD REPUBLIC TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	14 GLEN ALPINE RD PIEDMONT CA 946113523, PIEDMONT, CA 94611-3523

February 2017: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Feb 6, 2017
Property Address	3717 UNION CT, ANTIOCH, CA 94509-7023
Document Number	0000023240
Instrument Date	Jan 25, 2017
Instrument	23240
Transaction Type	Transfer
Record Updated	Feb 13, 2017
Title Company	OLD REPUBLIC TITLE

Transaction

Amount	Amount Recorded
Tax	$478.50
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	14 GLEN ALPINE RD PIEDMONT CA 946113523, PIEDMONT, CA 94611-3523

February 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Feb 6, 2017
Property Address	3717 UNION CT, ANTIOCH, CA 94509-7023
Document Number	0000023238
Map Reference	MAP316 PG48
Instrument Date	Jan 25, 2017
Instrument	2017-023238
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	14 GLEN ALPINE RD, PIEDMONT, CA 94611-3523

Mortgage

Document Number	0000023241
Date	Feb 6, 2017
Instrument	2017-023241

Lender

Name	FREMONT BANK
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Feb 1, 2047

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		$514,948 (+2%) Land $189,405 Building $325,543
2025	$6,276.00 (+5%)	$504,852 (+4.04%) Land $185,692 Building $319,160
2023	$5,977.00 (+1.6%)	$485,249 Land $178,482 Building $306,767
2022	$5,883.00

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 64% of the US · lower than 78% of California
Wildfire Likelihood	0.05% annual chance
Exposure	Indirect 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 501 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 · Fixed Wireless in parts of the area	100 / 20

May also be available: Verizon.

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