409 Agate Ct, Antioch, CA 94509 Property Records

Contra Costa County property record for 409 Agate Ct, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,152 sqft · built 1986
Lot Size	0.169 acres (7,373 sqft)
Owner	2 Individual Names on Record
Last Sale	$650,000 (Oct 2025)
Tax Bill	$6,097 (2025)
Deeds & Mortgages	Oct 2025 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`072-231-012-5`

Property Details

APN / Parcel Number

Primary APN	`072-231-012-5`
Alternative APN	`072-231-012`

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
Gross Area	2,656 sqft
1st Floor Area	1,140 sqft
2nd Floor Area	1,012 sqft

Exterior

Year Built	Built 1986
Effective Year Built	Effective 1998
Lot Area	7,373 sqft (0.169 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	409 AGATE CT
City	ANTIOCH
State	CA
Zip	94509-6913
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	T05614 L0027 B EX MR
Legal Subdivision	MAP/SUB 5614
Legal Tract	05614
Legal Lot Number	27
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	1
Census Block	1007
Census Tract	355109

Owner

Source: Contra Costa County records, as of July 14, 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 Individual Names on Record
Mailing Address	409 AGATE CT, ANTIOCH, CA 94509-6913
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 22, 2025 · Amount on Record
Deed Sale	Oct 22, 2025 · Amount on Record
Prior Sale	May 21, 2014 · Amount on Record
Deed Document Number	2025110993
Prior Transfer Date	Nov 23, 2016
Prior Transfer Doc	0000260772
Record Updated	Oct 29, 2026

October 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 22, 2025
Property Address	409 AGATE CT, ANTIOCH, CA 94509-6913
Document Number	0000110993
Map Reference	MB 284 PG 12
Instrument Date	Oct 10, 2025
Instrument	2025- 110993
Transaction Type	Transfer
Record Updated	Nov 3, 2025
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Right of Survivorship
Address	409 AGATE CT, ANTIOCH, CA 94509-6913

Mortgage

Document Number	0000110994
Date	Oct 22, 2025
Instrument	2025- 110994

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2055

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		$650,000 (+32.43%) Land $180,000 Building $470,000
2025	$6,097.00 (+5.05%)	$490,826 (+4.04%) Land $110,323 Building $380,503
2023	$5,804.00 (+1.59%)	$471,769 Land $106,040 Building $365,729
2022	$5,713.00

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

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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