Los Angeles County property record for 1603 Summitridge Dr, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,253 sqft · built 1986 |
| Lot Size | 0.165 acres (7,201 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $639,000 (Feb 2012) |
| Tax Bill | $10,991 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8713-046-013 |
| Primary APN | 8713-046-013 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 3,253 sqft Living Area |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1986 |
| Construction Type | Wood |
| Lot Area | 7,201 sqft (0.165 acres) |
| Lot Dimensions | 96 ft deep x 75 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 1603 SUMMITRIDGE DR |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-4336 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCRPD20000 |
| Legal Description | TR=42559 LOT 33 |
| Legal Subdivision | 42559 |
| Legal Tract | 42559 |
| Legal Block | 3 |
| Legal Lot Number | 33 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 403324 |
1603 Summitridge Dr is owned and occupied by two individuals who bought it in February 2012.
Source: Los Angeles County records, as of August 25, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 1603 SUMMITRIDGE DR, DIAMOND BAR, CA 91765-4336 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Feb 24, 2012 · Amount on File |
| Deed Sale | Feb 24, 2012 · Amount on File |
| Prior Sale | Mar 17, 2005 · Amount on File |
| Deed Document Number | 2012293433 |
| Prior Transfer Date | Aug 5, 2004 |
| Prior Transfer Doc | 0002097819 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 1603 Summitridge Dr was $10,991.
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 | $818,659 (+2%) Land $337,071 Building $481,588 | |
| 2025 | $10,991.00 | $802,608 Land $330,462 Building $472,146 |
| 2023 | $10,142.00 (+2.26%) | $771,444 Land $317,631 Building $453,813 |
| 2022 | $9,918.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1603 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 1603 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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