1129 Summitridge Dr, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 1129 Summitridge Dr, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 3,203 sqft · built 1987
Lot Size	0.705 acres (30,729 sqft)
Owner	2 Company Names on File
Tax Bill	$7,580 (2025)
Deeds & Mortgages	Aug 2020 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8701-038-008`

Property Details

APN / Parcel Number

Primary APN	`8701-038-008`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	3,203 sqft Living Area

Exterior

Year Built	Built 1987
Effective Year Built	Effective 1987
Construction Type	Wood
Lot Area	30,729 sqft (0.705 acres)
Lot Dimensions	502 ft deep x 55 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	1129 SUMMITRIDGE DR
City	DIAMOND BAR
State	CA
Zip	91765-4363
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCRPD20000
Legal Description	TR=42570 LOT 8
Legal Subdivision	42570
Legal Tract	42570
Legal Block	1
Legal Lot Number	8
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1006
Census Tract	403320

Owner

Source: Los Angeles County records · APN 8701-038-008

Assessment roll updated May 21, 2026 · Last verified June 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 File
Mailing Address	987 SKY MEADOW PL, WALNUT, CA 91789-5225
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Transfer Date	Mar 16, 2020
Transfer Doc	0001005327
Record Updated	Sep 20, 2026

August 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Aug 26, 2020
Property Address	1129 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363
Document Number	0001005327
Instrument Date	Mar 16, 2020
Instrument	1005327
Transaction Type	Transfer
Record Updated	Sep 22, 2020
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	987 SKY MEADOW PL WALNUT CA 917895225, WALNUT, CA 91789-5225

Tax Assessment & Valuation

Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 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

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

Year	Tax Bill	Assessed Value
2025	$7,580.00 (+10.46%) Homeowner's exemption	$500,508 (+4.04%) Land $199,050 Building $301,458
2023	$6,862.00 (+3.08%) Homeowner's exemption	$481,075 Land $191,322 Building $289,753
2022	$6,657.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

Wildfire Risk	Moderate above 58% of the US · lower than 65% of California
Wildfire Likelihood	0.2% annual chance
Exposure	Direct burnable vegetation at the parcel

Values are read at the parcel center point; lenders make the official flood determination.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Spectrum Cable	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

Based on FCC filings for 529 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	WALNUT VALLEY WATER DISTRICT serves 100,941 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.