| Primary address | 21057 Topaz Lane, Diamond Bar |
| Zip code | 91765 |
| County | Los Angeles |
| Municipality | Diamond Bar |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 12/29/2010 |
| Sale price | $1,120,011 |
| Arm's length | Register |
| Current property tax | $18,169 |
| Building sqft | 4,521 |
| Building class | Single Family Residence (0100) |
| Acreage | 0.192
|
| Units | 1 |
| Year built | 1998 |
| Year last altered | Register |
| Bedrooms | 5 |
| Bathrooms | 5 |
| Heating/AC | Central refrigeration & heating |
| Zoning district | Low Density Residential (RL) |
| Weed hazard | No |
| School district | Walnut Valley Unified School District |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
21057 Topaz Lane, Diamond Bar, CA 91765 was built in 1998 and has a total of 4,521 square feet.
What is the assessed value of 21057 Topaz Lane, Diamond Bar, CA 91765 and the property tax paid?Assessed at $1,463,600, the tax amount paid for 21057 Topaz Lane, Diamond Bar, CA 91765 is $17,140.
When was 21057 Topaz Lane, Diamond Bar, CA 91765 last sold?21057 Topaz Lane, Diamond Bar, CA 91765 was last sold in 10/17/2025.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 21057 Topaz Lane, Diamond Bar, including title documents, transfer conditions, mortgages and liens.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 21057 Topaz Lane, Diamond Bar, CA 91765. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Base tax | $17,140 |
| Current property tax | $18,169 |
| Market value | $1,463,600 |
| Tax per sqft | $4 |
Abatements, financial assistance programs and non-ad valorem taxes levied as special taxes/direct assessments are applicable for this property.
| Code | Description | Tax levied |
|---|---|---|
| 06221 | County Sanitation District #21 | Register |
| 14651 | Diamond Bar District #38 | Register |
| 06181 | Greater L.A. County Vector Control District | Register |
| 03694 | La County Regional Park And Open Space District | Register |
| 00744 | Los Angeles County Fire Department | Register |
Here's the assessment & property tax history for 21057 Topaz Lane, Diamond Bar, including the evolution of the total tax rate and corresponding property tax.
| Year | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|
| 2025-2026 | $1,463,600 | 1.1711 | $17,140 | +3.43% |
| 2024-2025 | $1,434,903 | 1.1549 | $16,572 | +2.57% |
| 2023-2024 | $1,406,769 | 1.1485 | $16,157 | +2.10% |
| 2022-2023 | $1,379,187 | 1.1474 | $15,825 | +1.75% |
| 2021-2022 | $1,352,146 | 1.1502 | $15,552 | +1.31% |
The complete history of permits filed for 21057 Topaz Lane, Diamond Bar, including new construction or demolition permits, complaints, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.
Access a detailed real estate market overview of Diamond Bar so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Diamond Bar and compare it to other neighborhoods in Los Angeles County.
Check out recently sold homes in Diamond-Bar and see how their prices compare.
Create a free account to unlock extended information for 21057 Topaz Lane, Diamond Bar, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | X (See more on map) |
| Fire hazard zone | See more on map |
| Faults and tsunami inundation zone map | Register |
| Landslides and liquefaction map | Register |
Access the detailed traffic volume map for 21057 Topaz Lane, Diamond Bar to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Institute Of Knowledge | NR | Private | K-8 | 127 | 0.61 |
| Institute of Knowledge | NR | Private | K-10 | 265 | 0.67 |
| Discovery World Montessori School | NR | Private | K-6 | 70 | 0.78 |
| Discovery World Montessori | NR | Private | K-4 | 19 | 0.78 |
| Walnut Valley Adult | NR | Public | 0 | 0.81 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| South Pointe Middle School | 8 | Public | 6-8 | 879 | 0.24 |
| Institute Of Knowledge | NR | Private | K-8 | 127 | 0.61 |
| Institute of Knowledge | NR | Private | K-10 | 265 | 0.67 |
| Walnut Valley Adult | NR | Public | 0 | 0.81 | |
| International Cross Academy | NR | Private | 1-12 | 0 | 1.01 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Institute of Knowledge | NR | Private | K-10 | 265 | 0.67 |
| Walnut Valley Adult | NR | Public | 0 | 0.81 | |
| Diamond Bar High School | 10 | Public | 9-12 | 2,557 | 0.85 |
| International Cross Academy | NR | Private | 1-12 | 0 | 1.01 |
| Ron Hockwalt Academies (Continuation) School | NR | Public | 9-12 | 41 | 1.36 |
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Here are the neighbors for 21057 Topaz Lane, Diamond Bar.