5120 Roundup Ct, Antioch, CA 94531 Property Records

Contra Costa County property record for 5120 Roundup Ct, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 1,680 sqft · built 1994
Lot Size	0.126 acres (5,500 sqft)
Owner	Individual Name on Record
Last Sale	$165,000 (Dec 2011)
Tax Bill	$2,892 (2025)
Deeds & Mortgages	Nov 2019 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`056-240-013-5`

Property Details

APN / Parcel Number

Primary APN	`056-240-013-5`
Alternative APN	`056-240-013`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	2 Stories
Building Area	1,680 sqft Living Area
1st Floor Area	866 sqft
2nd Floor Area	814 sqft

Exterior

Year Built	Built 1994
Effective Year Built	Effective 1995
Lot Area	5,500 sqft (0.126 acres)
Garage Type	Attached
Garage Area	471 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	5120 ROUNDUP CT
City	ANTIOCH
State	CA
Zip	94531-8474
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T7620 L497
Legal Subdivision	SUBDIVISION 7620
Legal Tract	7620
Legal Lot Number	497
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	EAST CONTRA COSTA
Census Block Group	1
Census Block	1011
Census Tract	303207

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic District	Within the Shannon-Williamson Ranch listed 1987 · 12 contributing resources · NRIS 87000003

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

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	Individual Name on Record
Mailing Address	5120 ROUNDUP CT, ANTIOCH, CA 94531-8474
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 5, 2011 · Amount on Record
Deed Sale	Dec 5, 2011 · Amount on Record
Prior Sale	Dec 1, 2010 · Amount on Record
Deed Document Number	2011263643
Record Updated	Oct 29, 2026

November 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	5120 ROUNDUP CT, ANTIOCH, CA 94531-8474
Document Number	0000207033
Instrument Date	Nov 13, 2019
Transaction Type	Mortgage
Record Updated	Nov 28, 2019
Title Company	AMROCK TITLE CA INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	5120 ROUNDUP CT ANTIOCH CA 945318474, ANTIOCH, CA 94531-8474

Mortgage

Document Number	0000207033
Date	Nov 19, 2019
Instrument	207033

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Nov 18, 2049

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		$211,377 (+2%) Land $51,239 Building $160,138
2025	$2,892.00 (+6.64%)	$207,234 (+4.04%) Land $50,235 Building $156,999
2023	$2,712.00 (+1.35%)	$199,188 Land $48,285 Building $150,903
2022	$2,676.00

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 62% of the US · lower than 77% of California
Wildfire Likelihood	0.06% 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 638 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
AT&T DSL	100 / 20