4500 Knollpark Cir, Antioch, CA 94531 Property Records

Contra Costa County property record for 4500 Knollpark Cir, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 1,915 sqft · built 1989
Lot Size	0.11 acres (4,785 sqft)
Owner	Company Name on File
Last Sale	$250,000 (Sep 2012)
Tax Bill	$4,091 (2025)
Flood Zone	Zone X (minimal risk)
APN	`056-050-070-4`

Property Details

APN / Parcel Number

Primary APN	`056-050-070-4`
Alternative APN	`056-050-070`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	1,915 sqft Living Area
1st Floor Area	942 sqft
2nd Floor Area	973 sqft

Exterior

Year Built	Built 1989
Effective Year Built	Effective 1989
Lot Area	4,785 sqft (0.11 acres)
Garage Type	Attached
Garage Area	614 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	4500 KNOLLPARK CIR
City	ANTIOCH
State	CA
Zip	94531-7706
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T6975 L124
Legal Tract	6975
Legal Lot Number	124
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	2
Census Block	2009
Census Tract	355110

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	Company Name on File
Mailing Address	2500 ORTEGA ST, SAN FRANCISCO, CA 94122-4135
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Sep 21, 2012 · Amount on Record
Deed Sale	Sep 21, 2012 · Amount on Record
Deed Document Number	2012231867
Last Transfer Date	Sep 21, 2016
Transfer Doc	0000197810
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		$314,000 (+2%) Land $50,235 Building $263,765
2025	$4,091.00 (+5.36%)	$307,844 (+4.04%) Land $49,250 Building $258,594
2023	$3,883.00 (+1.49%)	$295,892 Land $47,339 Building $248,553
2022	$3,826.00

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
Nearest Special Flood Hazard Area	Zone A, within 500 ft
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

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 797 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
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20
AT&T DSL · Fiber in parts of the area	100 / 20