409 Boulder Dr, Antioch, CA 94509 Property Records

Contra Costa County property record for 409 Boulder Dr, Antioch, CA 94509

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,152 sqft · built 1986
Lot Size	0.179 acres (7,812 sqft)
Owner	2 Company Names on Record
Last Sale	$570,000 (Jul 2020)
Tax Bill	$7,430 (2025)
Deeds & Mortgages	Mar 2021 Mortgage May 2026 Sale + 1 more
Flood Zone	Zone X (minimal risk)
APN	`072-232-001-7`

Property Details

APN / Parcel Number

Primary APN	`072-232-001-7`
Alternative APN	`072-232-001`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,152 sqft Living Area
1st Floor Area	1,140 sqft
2nd Floor Area	1,012 sqft

Exterior

Year Built	Built 1986
Effective Year Built	Effective 2000
Lot Area	7,812 sqft (0.179 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	409 BOULDER DR
City	ANTIOCH
State	CA
Zip	94509-6907
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	T05614 L0039 B EX MR
Legal Subdivision	SUBDIVISION 5614
Legal Tract	05614
Legal Lot Number	39
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	1
Census Block	1002
Census Tract	355109

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	2 Company Names on Record
Mailing Address	409 BOULDER DR, ANTIOCH, CA 94509-6907
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 8, 2021	Deed of Trust, Mortgage · Conventional Mortgage PLAZA HOME MORTGAGE INC
May 21, 2026	Grant Deed, Transfer NONE LISTED ON DOCUMENT
Jul 2, 2020	Grant Deed, Transfer · Conventional Mortgage SIERRA PACIFIC MORTGAGE CO INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 2, 2020 · Amount on Record
Deed Sale	Jul 2, 2020 · Amount on Record
Prior Sale	Apr 29, 2010 · Amount on Record
Deed Document Number	2020131671
Prior Transfer Date	Oct 25, 2001
Prior Transfer Doc	0000342124
Record Updated	Oct 29, 2026

March 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	409 BOULDER DR, ANTIOCH, CA 94509-6907
Transaction Type	Mortgage
Record Updated	Jun 9, 2026
Title Company	NORTH AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	409 BOULDER DR, ANTIOCH, CA 94509-6907

Mortgage

Document Number	0000069832
Date	Mar 8, 2021
Instrument	2021-069832

Lender

Name	PLAZA HOME MORTGAGE INC
Type	Mortgage Company
Address	SAN DIEGO, CA 92121

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Apr 1, 2051

May 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	May 21, 2026
Property Address	409 BOULDER DR, ANTIOCH, CA 94509-6907
Document Number	0000053195
Instrument Date	May 20, 2026
Instrument	202653195
Transaction Type	Transfer
Record Updated	Aug 29, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	409 BOULDER DR, ANTIOCH, CA 94509-6907

July 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 2, 2020
Property Address	409 BOULDER DR, ANTIOCH, CA 94509-6907
Document Number	0000131671
Map Reference	MB 284 PG 12
Instrument Date	Jun 23, 2020
Instrument	2020-131671
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	CALATLANTIC TITLE INC

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	409 BOULDER DR, ANTIOCH, CA 94509-6907

Mortgage

Document Number	0000131672
Date	Jul 2, 2020
Instrument	2020-131672

Lender

Name	SIERRA PACIFIC MORTGAGE CO INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Aug 1, 2050

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		$629,323 (+2%) Land $231,856 Building $397,467
2025	$7,430.00 (+4.96%) Homeowner's exemption	$616,984 (+4.04%) Land $227,310 Building $389,674
2023	$7,079.00 (+1.64%) Homeowner's exemption	$593,028 Land $218,484 Building $374,544
2022	$6,965.00

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 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond 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 645 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
AT&T DSL	100 / 20

May also be available: Verizon.

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