| Primary address | 20231 Portside Drive, Walnut |
| Zip code | 91789 |
| County | Los Angeles |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Current property tax | $6,989 |
| Building sqft | 2,648 |
| Building class | Single Family Residence (0100) |
| Acreage | 0.271
|
| Units | 1 |
| Year built | 1987 |
| Year last altered | Register |
| Bedrooms | 4 |
| Bathrooms | 3 |
| Heating/AC | Central refrigeration & heating |
| Zoning district | Light Agricultural (A-1-1) |
| Weed hazard | No |
| School district | Rowland 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:
20231 Portside Drive, Walnut, CA 91789 was built in 1987 and has a total of 2,648 square feet.
What is the assessed value of 20231 Portside Drive, Walnut, CA 91789 and the property tax paid?Assessed at $517,348, the tax amount paid for 20231 Portside Drive, Walnut, CA 91789 is $6,087.
When was 20231 Portside Drive, Walnut, CA 91789 last sold?20231 Portside Drive, Walnut, CA 91789 was last sold in 07/29/2013.
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 20231 Portside Drive, Walnut, 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 20231 Portside Drive, Walnut, CA 91789. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Base tax | $6,087 |
| Current property tax | $6,989 |
| Market value | $517,348 |
| Tax per sqft | $2 |
Abatements, financial assistance programs and non-ad valorem taxes levied as special taxes/direct assessments are applicable for this property.
| Code | Description | Tax levied |
|---|---|---|
| 00311 | County Library Services | Register |
| 06221 | County Sanitation District #21 | 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 20231 Portside Drive, Walnut, 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 | $517,348 | 1.1766 | $6,087 | +1.93% |
| 2024-2025 | $507,204 | 1.1774 | $5,972 | +3.73% |
| 2023-2024 | $497,260 | 1.1578 | $5,757 | +2.22% |
| 2022-2023 | $487,511 | 1.1553 | $5,632 | +1.50% |
| 2021-2022 | $477,953 | 1.1609 | $5,549 | +1.37% |
The complete history of permits filed for 20231 Portside Drive, Walnut, 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 Walnut so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Walnut and compare it to other neighborhoods in Los Angeles County.
Create a free account to unlock extended information for 20231 Portside Drive, Walnut, 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 20231 Portside Drive, Walnut 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) |
|---|---|---|---|---|---|
| Tzu Chi Elementary School - Walnut | NR | Private | K-5 | 53 | 0.87 |
| Montessori School Of Diamond Bar | NR | Private | PK-K | 28 | 0.95 |
| Montessori School Of Diamond Bar | NR | Private | PK-K | 28 | 0.95 |
| Shelyn Elementary School | 7 | Public | K-6 | 453 | 0.97 |
| Castle Rock Elementary School | 7 | Public | K-5 | 646 | 1.12 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Elite Open School | NR | Private | 5-12 | 43 | 1.15 |
| Ybarra Academy For The Arts And Technology | 7 | Public | K-8 | 596 | 1.40 |
| Wisdom Kids College | NR | Private | K-8 | 0 | 1.46 |
| Rowland Adult And Community Education | NR | Public | 0 | 1.47 | |
| South Pointe Middle School | 8 | Public | 6-8 | 879 | 1.56 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Elite Open School | NR | Private | 5-12 | 43 | 1.15 |
| John A. Rowland High School | 8 | Public | 9-12 | 2,025 | 1.40 |
| Diamond Bar High School | 10 | Public | 9-12 | 2,557 | 1.40 |
| Rowland Adult And Community Education | NR | Public | 0 | 1.47 | |
| Rowland Unified Community Day School | NR | Public | 7-12 | 31 | 1.62 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 20231 Portside Drive, Walnut.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 20288 Portside Dr, Walnut | 3,336 | 06/02/2008 | |
| 20305 Rimview Pl, Walnut | 3,861 | 04/01/2011 | $790,007 |
| 20223 Portside Dr, Walnut | 3,002 | 03/08/2023 | |
| 20277 Edgemont Pl, Walnut | 2,072 | 10/06/2006 | |
| 20354 Edgemont Pl, Walnut | 3,002 | 01/13/2017 | |
| 20311 Rimview Pl, Walnut | 2,796 | 05/10/2017 | |
| 20273 Edgemont Pl, Walnut | 2,282 | 05/01/2023 | $1,128,000 |
| 20237 Portside Dr, Walnut | 3,002 | 01/12/2017 | |
| 20279 Portside Dr, Walnut | 1,647 | 04/12/2021 | |
| 20267 Edgemont Pl, Walnut | 1,981 | 08/27/2009 | |
| 20259 Portside Dr, Walnut | 1,981 | 04/01/2003 | |
| 20265 Portside Dr, Walnut | 2,282 | 01/29/2013 | $585,000 |
| 20273 Portside Dr, Walnut | 2,072 | 05/09/2001 | $370,000 |
| 20205 Portside Dr, Walnut | 3,002 | 01/14/2000 | |
| 20264 Portside Dr, Walnut | 2,796 | 10/24/2024 | |
| 20245 Portside Dr, Walnut | 2,796 | 10/09/2003 | $633,006 |
| 20253 Portside Dr, Walnut | 1,647 | 09/26/2025 | |
| 20215 Portside Dr, Walnut | 2,796 | 06/18/2024 | |
| 20278 Portside Dr, Walnut | 2,648 | 11/07/2006 | |
| 2723 S Hillrise Dr, Walnut | 2,282 | 04/08/2025 |