4528 Loon Ct, Antioch, CA 94531 Property Records

Contra Costa County property record for 4528 Loon Ct, Antioch, CA 94531

Property Summary

Property Type	Single Family Home
Details	3 bd · 2.5 ba · 2,478 sqft · built 2001
Lot Size	0.133 acres (5,781 sqft)
Owner	2 Individual Names on Record
Last Sale	$690,000 (May 2023)
Tax Bill	$8,329 (2025)
Deeds & Mortgages	May 2023 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`053-660-019`

Property Details

APN / Parcel Number

Primary APN	`053-660-019`
Alternative APN	`053-660-019-0`

Interior

Bedrooms	3 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	2,478 sqft Living Area
1st Floor Area	1,063 sqft
2nd Floor Area	1,415 sqft

Exterior

Year Built	Built 2001
Effective Year Built	Effective 2001
Lot Area	5,781 sqft (0.133 acres)
Garage Type	Attached
Garage Area	424 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	4528 LOON CT
City	ANTIOCH
State	CA
Zip	94531-9385
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T7219 L582
Legal Subdivision	SUBDIVISION 7219
Legal Tract	7219
Legal Lot Number	582
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	ANTIOCH-PITTSBURG
Census Block Group	1
Census Block	1022
Census Tract	308002

Owner

Source: Contra Costa County records, as of August 17, 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 Record
Mailing Address	4528 LOON CT, ANTIOCH, CA 94531-9385
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 25, 2023 · Amount on Record
Deed Sale	May 25, 2023 · Amount on Record
Prior Sale	Nov 6, 2001 · Amount on Record
Deed Document Number	202349818
Prior Transfer Date	Mar 24, 2010
Prior Transfer Doc	0000064077
Record Updated	Sep 20, 2026

May 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	May 25, 2023
Property Address	4528 LOON CT, ANTIOCH, CA 94531-9385
Document Number	0000049818
Map Reference	MB 430 PG 31
Instrument Date	May 18, 2023
Instrument	2023-049818
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount Recorded
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	Joint Tenants
Address	4528 LOON CT, ANTIOCH, CA 94531-9385

Mortgage

Document Number	0000049819
Date	May 25, 2023
Instrument	2023-049819

Lender

Name	AMERICAN PACIFIC MORTGAGE CORP
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2053

Mortgage

Document Number	0000049820
Date	May 25, 2023
Instrument	2023-049820

Lender

Name	AMERICAN PACIFIC MORTGAGE CORP
Type	Mortgage Company
Address	ROSEVILLE, CA 95661

Agreement

Type	Stand-Alone Second Mortgage
Amount	Amount Recorded
Term	362 Months
Due	Jul 18, 2053

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		$732,232 (+2%) Land $249,383 Building $482,849
2025	$8,329.00 (+61.7%)	$717,876 (+67.86%) Land $244,494 Building $473,382
2023	$5,151.00 (+1.52%)	$427,664 Land $134,881 Building $292,783
2022	$5,074.00

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 · 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	2 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

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 550 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 Fixed Wireless	100 / 20

May also be available: AT&T.

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