21203 Ambushers St, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21203 Ambushers St, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,722 sqft · built 1981
Lot Size	0.256 acres (11,166 sqft)
Owner	2 Company Names on Record
Tax Bill	$9,147 (2025)
Deeds & Mortgages	Jan 2026 Line of Credit Dec 2022 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8714-011-005`

Property Details

APN / Parcel Number

Primary APN	`8714-011-005`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	2,722 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	11,166 sqft (0.256 acres)
Lot Dimensions	158 ft deep x 70 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21203 AMBUSHERS ST
City	DIAMOND BAR
State	CA
Zip	91765-3736
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR19000*
Legal Description	*TR=34160 LOT 13
Legal Subdivision	34160
Legal Tract	34160
Legal Block	2
Legal Lot Number	13
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 June 16, 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	21203 AMBUSHERS ST, DIAMOND BAR, CA 91765-3736
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Date	Document
Jan 5, 2026	Intrafamily Transfer, Transfer · Line of Credit SCHOOLSFIRST FCU
Dec 19, 2022	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Dec 2, 2022
Transfer Doc	0001181490
Record Updated	Sep 20, 2026

January 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Jan 5, 2026
Property Address	21203 AMBUSHERS ST, DIAMOND BAR, CA 91765-3736
Document Number	0000006334
Map Reference	MB 900 PG 20-25
Instrument Date	Dec 20, 2025
Instrument	26-0006334
Transaction Type	Transfer
Record Updated	Jan 14, 2026
Title Company	FIRST AMERICAN TITLE INSURANCE COMPANY NC, FIRST AMERICAN TITLE INS 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	Family Trust
Address	21203 AMBUSHERS ST, DIAMOND BAR, CA 91765-3736

Mortgage

Document Number	0000006335
Date	Jan 5, 2026
Instrument	26-0006335

Lender

Name	SCHOOLSFIRST FCU
Type	Credit Union

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

December 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Dec 19, 2022
Property Address	21203 AMBUSHERS ST, DIAMOND BAR, CA 91765-3736
Document Number	0001181490
Map Reference	MB 900 PG 20-25
Instrument Date	Dec 2, 2022
Instrument	22-1181490
Transaction Type	Transfer
Record Updated	Jun 7, 2023

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	Family Trust
Address	21203 AMBUSHERS ST, DIAMOND BAR, CA 91765-3736

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of May 21, 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
2025	$9,147.00 (+9.54%)	$683,454 (+4.04%) Land $281,138 Building $402,316
2023	$8,350.00 (+2.72%)	$656,917 Land $270,222 Building $386,695
2022	$8,129.00

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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