1375 Calbourne Dr, Diamond Bar (Walnut), CA 91789 Property Records

Los Angeles County property record for 1375 Calbourne Dr, Diamond Bar, CA 91789

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,304 sqft · built 1976
Lot Size	0.237 acres (10,336 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,160,000 (Apr 2022)
Tax Bill	$13,809 (2025)
Deeds & Mortgages	Apr 2022 Sale & Mortgage Apr 2022 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`8763-023-029`

Property Details

APN / Parcel Number

Primary APN	`8763-023-029`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	2,304 sqft Living Area

Exterior

Year Built	Built 1976
Effective Year Built	Effective 1976
Construction Type	Wood
Lot Area	10,336 sqft (0.237 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	1375 CALBOURNE DR
City	WALNUT
State	CA
Zip	91789-3710
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR110000*
Legal Description	TRACT NO 32109 LOT 44
Legal Subdivision	32109
Legal Tract	32109
Legal Block	3
Legal Lot Number	44
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	3
Census Block	3010
Census Tract	408707

Owner

Source: Los Angeles County records, as of August 25, 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	1375 CALBOURNE DR, WALNUT, CA 91789-3710
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Apr 15, 2022	Grant Deed, Transfer · VA Mortgage LOANDEPOT.COM LLC
Apr 15, 2022	Intrafamily Transfer, Transfer OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY
Apr 15, 2022	Affidavit of Death of Trustee, Transfer OLD REPUBLIC TITLE COMPANY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 15, 2022 · Amount on Record
Deed Sale	Apr 15, 2022 · Amount on Record
Deed Document Number	2022420287
Prior Transfer Date	Oct 27, 1993
Prior Transfer Doc	0000526450
Record Updated	Oct 29, 2026

April 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Apr 15, 2022
Property Address	1375 CALBOURNE DR, DIAMOND BAR, CA 91789-3710
Document Number	0000420287
Map Reference	MB 849 PG 21-24
Instrument Date	Apr 13, 2022
Instrument	22-0420287
Transaction Type	Transfer
Record Updated	Apr 22, 2022
Title Company	OLD REPUBLIC TITLE COMPANY

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	Joint Tenants
Address	1375 CALBOURNE DR, DIAMOND BAR, CA 91789-3710

Mortgage

Document Number	0000420288
Date	Apr 15, 2022
Instrument	22-0420288

Lender

Name	LOANDEPOT.COM LLC
Type	Mortgage Company
Address	FOOTHILL RANCH, CA 92610

Agreement

Type	VA Mortgage
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2052

April 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Apr 15, 2022
Property Address	1375 CALBOURNE DR, DIAMOND BAR, CA 91789-3710
Document Number	0000420286
Map Reference	MB 849 PG 21-24
Instrument Date	Apr 13, 2022
Instrument	22-0420286
Transaction Type	Transfer
Record Updated	Apr 22, 2022
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	100 JACOBY ST, GOLD HILL, OR 97525-9683

April 2022: Affidavit of Death of Trustee, Transfer

Document Type	Affidavit of Death of Trustee
Jurisdiction	LOS ANGELES CA
Recording Date	Apr 15, 2022
Property Address	1375 CALBOURNE DR, DIAMOND BAR, CA 91789-3710
Document Number	0000420285
Map Reference	MB 849 PG 21-24
Instrument Date	Apr 13, 2022
Instrument	22-0420285
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

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

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	100 JACOBY ST, GOLD HILL, OR 97525-9683

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of August 25, 2026

Property Jurisdictions

Type	Name
State	California
County	Los Angeles County
Municipality	Diamond Bar City
Unified School District	Walnut Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$1,297,725 (+2%) Land $757,701 Building $540,024
2025	$13,809.00 (-6.73%)	$1,272,281 (+4.04%) Land $742,845 Building $529,436
2023	$14,805.00 (+364.84%)	$1,222,878 Land $714,000 Building $508,878
2022	$3,185.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective September 30, 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 95% of the US · lower than 97% of California
Wildfire Likelihood	0.03% annual chance
Exposure	Direct burnable vegetation

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	WALNUT VALLEY WATER DISTRICT serves 100,941 people · EPA ID CA1910234
Water Source	Purchased surface water from several systems
Last State Inspection	Jun 2023
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 458 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Frontier Fiber	7,000 / 7,000
Spectrum Cable	1,000 / 1,000
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T, GeoLinks, Verizon.

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