21121 Ambushers St, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21121 Ambushers St, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	5 bd · 5 ba · 3,652 sqft · built 1981
Lot Size	0.292 acres (12,696 sqft)
Owner	2 Trust Names on File
Last Sale	$150,000 (Aug 1994)
Tax Bill	$9,476 (2025)
Deeds & Mortgages	Dec 2020 Mortgage Mar 2019 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8714-011-009`

Property Details

APN / Parcel Number

Primary APN	`8714-011-009`

Interior

Bedrooms	5 Beds
Full Baths	5 Baths
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	3,652 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1981
Effective Year Built	Effective 1984
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Tile
Lot Area	12,696 sqft (0.292 acres)
Lot Dimensions	169 ft deep x 75 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Water Source	Commercial

Location & Zoning

Street Address	21121 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 17
Legal Subdivision	34160
Legal Tract	34160
Legal Block	2
Legal Lot Number	17
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2017
Census Tract	403325

Owner

21121 Ambushers St is held in a trust since March 1995.

Source: Los Angeles County records, as of August 25, 2026

Owner of Record	2 Trust Names on File
Mailing Address	21121 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734
Owner Type	Company
Vesting	Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Dec 3, 2020	Intrafamily Transfer, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE
Mar 25, 2019	Deed of Trust, Mortgage CALIFORNIA BK&TR

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 17, 1994 · Amount on File
Deed Sale	Aug 17, 1994 · Amount on File
Deed Document Number	19941521971
Last Transfer Date	Mar 24, 1995
Transfer Doc	0000459881
Record Updated	Oct 29, 2026

December 2020: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Dec 3, 2020
Property Address	21121 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734
Document Number	0001572590
Map Reference	MB 900 PG 20-25
Instrument Date	Nov 24, 2020
Instrument	20-1572590
Transaction Type	Transfer
Record Updated	Sep 22, 2021
Title Company	CHICAGO TITLE INSURANCE CO

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
Relationship	Living Trust
Address	21121 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734

Mortgage

Document Number	0001572591
Date	Dec 3, 2020
Instrument	20-1572591

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	180 Months
Due	Dec 1, 2035

March 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21121 AMBUSHERS ST, DIAMOND BAR, CA 91765-3734
Document Number	0000280121
Instrument Date	Mar 25, 2019
Transaction Type	Mortgage
Record Updated	Apr 8, 2019
Title Company	TICOR TITLE COMPANY/CA, TICOR TITLE CO/CA

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	21121 AMBUSHERS ST DIAMOND BAR CA 917653734, DIAMOND BAR, CA 91765-3734

Mortgage

Document Number	0000280121
Date	Apr 1, 2019
Instrument	280121

Lender

Name	CALIFORNIA BK&TR
Type	Bank
Address	SAN CLEMENTE, CA 92672

Agreement

Amount	Amount on Record
Term	360 Months
Due	Mar 31, 2049

Interest

Rate Type	Adjustable Rate
Rate	4%

Tax Assessment & Valuation

The 2025 property tax bill for 21121 Ambushers St was $9,476.

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		$708,409 (+2%) Land $224,596 Building $483,813
2025	$9,476.00	$694,520 Land $220,193 Building $474,327
2023	$8,619.00 (+2.68%)	$667,553 Land $211,644 Building $455,909
2022	$8,394.00

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

Flood

FEMA maps place 21121 Ambushers St in Zone X, an area of minimal flood risk.

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

Wildfire risk around 21121 Ambushers St is moderate, ranking above 48% of the US, with a 0.08% annual chance of 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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