1112 W 9th St, Antioch, CA 94509 Property Records

Contra Costa County property record for 1112 W 9th St, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 845 sqft · built 1947
Lot Size	0.115 acres (5,000 sqft)
Owner	2 Individual Names on File
Last Sale	$100,000 (Mar 2025)
Tax Bill	$1,052 (2025)
Flood Zone	Zone X (minimal risk)
APN	`066-222-024-3`

Property Details

APN / Parcel Number

Primary APN	`066-222-024-3`
Alternative APN	`066-222-024`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	5 Rooms
Stories	1 Story
Building Area	845 sqft Living Area
1st Floor Area	845 sqft

Exterior

Year Built	Built 1947
Effective Year Built	Effective 1947
Lot Area	5,000 sqft (0.115 acres)
Garage Type	Attached
Garage Area	480 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	1112 W 9TH ST
City	ANTIOCH
State	CA
Zip	94509-1026
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	WESTERN SUBN LOT 9 BLK 87
Legal Subdivision	WESTERN SUB
Legal Block	87
Legal Lot Number	9
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	4
Census Block	4007
Census Tract	305000

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	2 Individual Names on File
Mailing Address	1112 W 9TH ST, ANTIOCH, CA 94509-1026
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Mar 3, 2025 · Amount on Record
Deed Sale	Mar 3, 2025 · Amount on Record
Deed Document Number	202519487
Prior Transfer Date	Jun 17, 2009
Prior Transfer Doc	0000152453
Record Updated	Sep 20, 2026

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		$423,300 (+743.7%) Land $255,000 Building $168,300
2025	$1,052.00 (+9.13%) Homeowner's exemption	$50,172 (+4.04%) Land $24,480 Building $25,692
2023	$964.00 (+1.05%) Homeowner's exemption	$48,226 Land $23,530 Building $24,696
2022	$954.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	5 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within 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 372 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · DSL · Fixed Wireless in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20