Los Angeles County property record for 1010 Summitridge Dr, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,225 sqft · built 1987 |
| Lot Size | 0.146 acres (6,343 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $17,503 (2025) |
| Deeds & Mortgages | Mar 2023 Transfer Mar 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 8701-040-057 |
| Primary APN | 8701-040-057 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 3,225 sqft Living Area |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1987 |
| Construction Type | Wood |
| Lot Area | 6,343 sqft (0.146 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 1010 SUMMITRIDGE DR |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-4364 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCRPD20000 |
| Legal Description | TR=42571 LOT 3 |
| Legal Subdivision | 42571 |
| Legal Tract | 42571 |
| Legal Block | 2 |
| Legal Lot Number | 3 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 403320 |
Source: Los Angeles County records, as of August 25, 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 | 1010 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4364 |
| Owner Type | Company |
| Vesting | Life Tenant |
| Date | Document |
|---|---|
| Mar 24, 2023 | Affidavit of Death of Trustee, Transfer |
| Mar 24, 2023 | Intrafamily Transfer, Transfer |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Jun 20, 2024 |
| Transfer Doc | 0000419671 |
| Record Updated | Oct 29, 2026 |
| Document Type | Affidavit of Death of Trustee |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Mar 24, 2023 |
| Property Address | 1010 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4364 |
| Document Number | 0000188751 |
| Map Reference | MB 1063 PG 72-76 |
| Instrument Date | Jan 4, 2023 |
| Instrument | 23-0188751 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 22632 GOLDEN SPRINGS DR STE 115, 115, DIAMOND BAR, CA 91765-4167 |
| Mail Care Of | MICHAEL W BROWN |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Mar 24, 2023 |
| Property Address | 1010 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4364 |
| Document Number | 0000188752 |
| Map Reference | MB 1063 PG 72-76 |
| Instrument Date | Jan 4, 2023 |
| Instrument | 23-0188752 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 3959 LANDMARK LN, BREA, CA 92823-1026 |
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Diamond Bar City |
| Unified School District | Walnut Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,385,668 (+2%) Land $672,726 Building $712,942 | |
| 2025 | $17,503.00 (+117.94%) | $1,358,499 (+134.65%) Land $659,536 Building $698,963 |
| 2024 | $8,031.00 (+2.48%) | |
| 2023 | $7,837.00 (+2.32%) Homeowner's exemption | $578,942 Land $228,512 Building $350,430 |
| 2022 | $7,659.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective September 30, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 1 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 62% of the US · lower than 62% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
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 |
| 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.
Source: FCC Broadband Data Collection, based on 414 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 |
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