Los Angeles County property record for 1631 Summitridge Dr, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,203 sqft · built 1985 |
| Lot Size | 0.302 acres (13,172 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $8,051 (2025) |
| Deeds & Mortgages | Apr 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 8713-045-054 |
| Primary APN | 8713-045-054 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 3,203 sqft Living Area |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1985 |
| Construction Type | Wood |
| Lot Area | 13,172 sqft (0.302 acres) |
| Lot Dimensions | 171 ft deep x 77 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 1631 SUMMITRIDGE DR |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-4338 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCRPD20000 |
| Legal Description | TR=42559 LOT 49 |
| Legal Subdivision | 42559 |
| Legal Tract | 42559 |
| Legal Block | 3 |
| Legal Lot Number | 49 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 403324 |
1631 Summitridge Dr is owned by a company that acquired it in March 2023.
Source: Los Angeles County records, as of August 25, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 1631 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4338 |
| Owner Type | Company |
| Vesting | Borrower in Default |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Mar 27, 2023 |
| Transfer Doc | 0000263893 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Apr 25, 2023 |
| Property Address | 1631 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4338 |
| Document Number | 0000263893 |
| Map Reference | MB 1032 PG 69-72 |
| Instrument Date | Mar 27, 2023 |
| Instrument | 23-0263893 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 1631 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4338 |
The 2025 property tax bill for 1631 Summitridge Dr was $8,051.
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 | $553,686 (+1.99%) Land $208,286 Building $345,400 | |
| 2025 | $8,051.00 | $542,862 Land $204,202 Building $338,660 |
| 2023 | $7,397.00 (+2.28%) | $521,784 Land $196,274 Building $325,510 |
| 2022 | $7,232.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1631 Summitridge Dr in Zone X, an area of minimal flood risk.
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.
Wildfire risk around 1631 Summitridge Dr is low, with a 0.03% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | None beyond 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 154 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 50 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Verizon.
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