Los Angeles County property record for 1157 Summitridge Dr, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,744 sqft · built 1987 |
| Lot Size | 0.52 acres (22,653 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $6,781 (2025) |
| Deeds & Mortgages | Nov 2018 Transfer Nov 2018 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 8701-038-004 |
| Primary APN | 8701-038-004 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 2,744 sqft Living Area |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1987 |
| Construction Type | Wood |
| Lot Area | 22,653 sqft (0.52 acres) |
| Lot Dimensions | 475 ft deep x 75 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 1157 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 4 |
| Legal Subdivision | 42570 |
| Legal Tract | 42570 |
| Legal Block | 1 |
| Legal Lot Number | 4 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 403320 |
1157 Summitridge Dr is owner-occupied and held in a trust since October 2018.
Source: Los Angeles County records, as of August 25, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 1157 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Nov 8, 2018 | Quit Claim Deed, Transfer Quitclaim |
| Nov 8, 2018 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Oct 31, 2018 |
| Transfer Doc | 0001134483 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Nov 8, 2018 |
| Property Address | 1157 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363 |
| Document Number | 0001134483 |
| Instrument Date | Oct 31, 2018 |
| Instrument | 1134483 |
| Transaction Type | Transfer |
| Record Updated | Nov 22, 2018 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 1157 SUMMITRIDGE DR DIAMOND BAR CA 917654363, DIAMOND BAR, CA 91765-4363 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Nov 8, 2018 |
| Property Address | 1157 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4363 |
| Document Number | 0001134484 |
| Instrument Date | Oct 31, 2018 |
| Instrument | 1134484 |
| Transaction Type | Transfer |
| Record Updated | Nov 22, 2018 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 1157 SUMMITRIDGE DR DIAMOND BAR CA 917654363, DIAMOND BAR, CA 91765-4363 |
The 2025 property tax bill for 1157 Summitridge Dr was $6,781 with a homeowner's exemption.
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 | $447,054 (+2%) Land $179,596 Building $267,458 | |
| 2025 | $6,781.00 Homeowner's exemption | $438,289 Land $176,075 Building $262,214 |
| 2023 | $6,111.00 (+3.21%) Homeowner's exemption | $421,272 Land $169,239 Building $252,033 |
| 2022 | $5,921.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1157 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 risk around 1157 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.
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 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 |
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