3509 Mac Ct, Antioch, CA 94509 Property Records

Contra Costa County property record for 3509 Mac Ct, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 1,370 sqft · built 1977
Lot Size	0.179 acres (7,800 sqft)
Owner	Company Name on Record
Last Sale	$169,500 (Mar 2013)
Tax Bill	$4,988 (2025)
Deeds & Mortgages	Nov 2023 Sale Dec 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`072-082-018-2`

Property Details

APN / Parcel Number

Primary APN	`072-082-018-2`
Alternative APN	`072-082-018`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	9 Rooms
Stories	1 Story
Building Area	1,370 sqft Living Area
1st Floor Area	1,370 sqft

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1978
Lot Area	7,800 sqft (0.179 acres)
Garage Type	Attached
Garage Area	462 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	3509 MAC CT
City	ANTIOCH
State	CA
Zip	94509-5941
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	TRACT 4668 LOT 42
Legal Subdivision	SUBDIVISION 6577
Legal Tract	4668
Legal Lot Number	42
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	2
Census Block	2007
Census Tract	307101

Owner

Source: Contra Costa County records, 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 Record
Mailing Address	345 PARK AVE, NEW YORK, NY 10154-0023
Owner Type	Company

Deeds, Mortgages & Sale History

Date	Document
Nov 30, 2023	Grant Deed, Transfer OS NATIONAL LLC
Dec 21, 2017	Quit Claim Deed, Transfer OS NATIONAL LLC

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Mar 6, 2013 · Amount on Record
Deed Sale	Mar 6, 2013 · Amount on Record
Prior Sale	Nov 3, 1999 · Amount on Record
Deed Document Number	201357604
Prior Transfer Date	Jan 3, 2013
Prior Transfer Doc	0000057604
Record Updated	Oct 29, 2026

November 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 30, 2023
Property Address	3509 MAC CT, ANTIOCH, CA 94509-5941
Document Number	0000126997
Map Reference	MB 375 PG 35
Instrument Date	Nov 29, 2023
Instrument	2023-126997
Transaction Type	Transfer
Record Updated	Dec 13, 2023
Title Company	OS NATIONAL LLC

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	15771 RED HILL AVE STE 100, 100, TUSTIN, CA 92780-7333
Investor	Possibly a Property Investor

December 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Dec 21, 2017
Property Address	3509 MAC CT, ANTIOCH, CA 94509-5941
Document Number	0000239760
Instrument Date	Dec 20, 2017
Instrument	239760
Transaction Type	Transfer
Record Updated	Jan 3, 2018
Title Company	OS NATIONAL LLC

Transaction

Tax	$0.00
Additional	Quitclaim Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	1508 BROOKHOLLOW DR SANTA ANA CA 927055433, SANTA ANA, CA 92705-5433

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		$561,816 (+42.38%) Land $275,706 Building $286,110
2025	$4,988.00 (+5.23%)	$394,594 (+4.04%) Land $185,692 Building $208,902
2023	$4,740.00 (+1.59%)	$379,273 Land $178,482 Building $200,791
2022	$4,666.00

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 AE, 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 65% of the US · lower than 79% of California
Wildfire Likelihood	0.04% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 582 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

May also be available: AT&T.

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