404 Agate Ct, Antioch, CA 94509 Property Records

Contra Costa County property record for 404 Agate Ct, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	5 bd · 3.5 ba · 2,699 sqft · built 1986
Lot Size	0.248 acres (10,800 sqft)
Owner	2 Individual Names on File
Last Sale	$425,000 (Jul 2013)
Tax Bill	$6,434 (2025)
Deeds & Mortgages	Apr 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`072-231-009-1`

Property Details

APN / Parcel Number

Primary APN	`072-231-009-1`
Alternative APN	`072-231-009`

Interior

Bedrooms	5 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	2,699 sqft Living Area
Gross Area	3,203 sqft
1st Floor Area	1,687 sqft
2nd Floor Area	1,012 sqft

Exterior

Year Built	Built 1986
Effective Year Built	Effective 1990
Lot Area	10,800 sqft (0.248 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	404 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 L0024 B EX MR
Legal Subdivision	SUBDIVISION 5614
Legal Tract	05614
Legal Lot Number	24
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 · APN 072-231-009-1

Assessment roll updated July 14, 2026 · Last verified July 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on File
Mailing Address	404 AGATE CT, ANTIOCH, CA 94509-6913
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Tenants in Common

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jul 30, 2013 · Amount on Record
Deed Sale	Jul 30, 2013 · Amount on Record
Deed Document Number	2013189646
Last Transfer Date	Apr 10, 2017
Transfer Doc	0000061755
Record Updated	Sep 20, 2026

April 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Apr 10, 2017
Property Address	404 AGATE CT, ANTIOCH, CA 94509-6913
Document Number	0000061755
Instrument Date	Apr 10, 2017
Instrument	61755
Transaction Type	Transfer
Record Updated	Apr 25, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	404 AGATE CT ANTIOCH CA 945096913, ANTIOCH, CA 94509-6913

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 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

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

Year	Tax Bill	Assessed Value
2026		$531,402 (+2%) Land $122,220 Building $409,182
2025	$6,434.00 (+5.01%)	$520,983 (+4.04%) Land $119,824 Building $401,159
2023	$6,127.00 (+1.59%)	$500,755 Land $115,172 Building $385,583
2022	$6,031.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 12, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

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 are read at the parcel center point; lenders make the official flood determination.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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.

Based on FCC filings for 645 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CITY OF ANTIOCH serves 116,781 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.