1135 Summitridge Dr, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 1135 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	0.72 acres (31,347 sqft)
Owner	2 Individual Names on File
Last Sale	$1,441,000 (Aug 2026)
Tax Bill	$9,518 (2025)
Deeds & Mortgages	Aug 2026 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8701-038-007`

Property Details

APN / Parcel Number

Primary APN	`8701-038-007`

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	31,347 sqft (0.72 acres)
Lot Dimensions	514 ft deep x 61 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	1135 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 7
Legal Subdivision	42570
Legal Tract	42570
Legal Block	1
Legal Lot Number	7
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1006
Census Tract	403320

Owner

1135 Summitridge Dr is owned and occupied by two individuals who bought it in August 2026.

Source: Los Angeles County records, as of September 24, 2026

Owner of Record	2 Individual Names on File
Mailing Address	1135 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	His Wife

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

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 12, 2026 · Amount on File
Deed Sale	Aug 12, 2026 · Amount on File
Prior Sale	Apr 26, 1995
Deed Document Number	2026599771
Record Updated	Oct 29, 2026

August 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Aug 12, 2026
Property Address	1135 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363
Document Number	0000599771
Instrument Date	Jul 16, 2026
Instrument	2026599771
Transaction Type	Transfer
Record Updated	Sep 24, 2026
Title Company	CALIFORNIA BEST TITLE CO, CALIFORNIA BEST TITLE

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$160,095.10
Amount Accuracy	Full Amount Stated
Additional	Notice of Default Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1135 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363

Mortgage

Document Number	0000599772,
Date	Aug 12, 2026
Instrument	2026599772

Lender

Name	MORTGAGE MORTGAGE

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	180 Months
Due	Sep 1, 2041

Interest

Rate Type	Fixed Rate
Initial Type	Fixed Rate
Max Rate	-1%

Tax Assessment & Valuation

The 2025 property tax bill for 1135 Summitridge Dr was $9,518.

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		$678,058 (+2%) Land $263,689 Building $414,369
2025	$9,518.00 Homeowner's exemption	$664,764 Land $258,519 Building $406,245
2023	$8,657.00 (+2.88%) Homeowner's exemption	$638,952 Land $248,481 Building $390,471
2022	$8,415.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 1135 Summitridge Dr 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 1135 Summitridge Dr is moderate, ranking above 58% of the US, with a 0.2% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Moderate above 58% of the US · lower than 65% of California
Wildfire Likelihood	0.2% 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 529 locations within half a mile, as of December 31, 2025

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