21143 Ambushers St, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21143 Ambushers St, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,885 sqft · built 1981
Lot Size	0.286 acres (12,447 sqft)
Owner	2 Company Names on Record
Tax Bill	$9,834 (2025)
Deeds & Mortgages	Aug 2019 Mortgage Dec 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8714-011-008`

Property Details

APN / Parcel Number

Primary APN	`8714-011-008`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	2,885 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1981
Effective Year Built	Effective 1981
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Tile
Lot Area	12,447 sqft (0.286 acres)
Lot Dimensions	161 ft deep x 77 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Water Source	Commercial

Location & Zoning

Street Address	21143 AMBUSHERS ST
City	DIAMOND BAR
State	CA
Zip	91765-3734
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR19000*
Legal Description	*TR=34160 LOT 16
Legal Subdivision	34160
Legal Tract	34160
Legal Block	2
Legal Lot Number	16
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2017
Census Tract	403325

Owner

Source: Los Angeles County records, as of August 25, 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	2 Company Names on Record
Mailing Address	21143 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Borrower in Default

Deeds, Mortgages & Sale History

Date	Document
Aug 15, 2019	Deed of Trust, Mortgage · Conventional Mortgage OWNING CORPORATION
Dec 16, 2020	Deed of Trust, Mortgage · Conventional Mortgage OWNING CORPORATION

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Jan 19, 2020
Transfer Doc	0000141529
Record Updated	Oct 29, 2026

August 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21143 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	ORANGE COAST TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000818397
Date	Aug 15, 2019
Instrument	19-0818397

Lender

Name	OWNING CORPORATION
Type	Non-Lending Institution
Address	ORANGE, CA 92868

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	181 Months
Due	Sep 1, 2034

December 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21143 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	ORANGE COAST TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21143 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734

Mortgage

Document Number	0001666958
Date	Dec 16, 2020
Instrument	20-1666958

Lender

Name	OWNING CORPORATION
Type	Non-Lending Institution
Address	ORANGE, CA 92868

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	181 Months
Due	Jan 1, 2036

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		$761,785 (+2%) Land $300,495 Building $461,290
2025	$9,834.00 (+9.41%) Homeowner's exemption	$746,849 (+4.04%) Land $294,603 Building $452,246
2023	$8,988.00 (+2.7%) Homeowner's exemption	$717,850 Land $283,164 Building $434,686
2022	$8,752.00

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	Moderate above 48% of the US · lower than 71% of California
Wildfire Likelihood	0.08% 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	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 565 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Frontier, Verizon.

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