| Primary address | 20107 Portside Drive, Walnut |
| Alternate address(es) | 20103 Portside Dr |
| 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.
| Sale date | 12/20/1989 |
| Sale price | $495,000 |
| Arm's length | Register |
| Current property tax | $12,583 |
| Building sqft | 2,706 |
| Building class | Single Family Residence - Planned Unit Development (010D) |
| Acreage | 0.861
|
| Units | 1 |
| Year built | 1989 |
| Year last altered | Register |
| Bedrooms | 4 |
| Bathrooms | 3 |
| Heating/AC | Central refrigeration & heating |
| Zoning district | Light Agricultural (A-1-1) |
| Weed hazard | Yes |
| 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:
20107 Portside Drive, Walnut, CA 91789 was built in 1989 and has a total of 2,706 square feet.
What is the assessed value of 20107 Portside Drive, Walnut, CA 91789 and the property tax paid?Assessed at $960,869, the tax amount paid for 20107 Portside Drive, Walnut, CA 91789 is $11,305.
When was 20107 Portside Drive, Walnut, CA 91789 last sold and what was the last sale price?20107 Portside Drive, Walnut, CA 91789 was last sold in 12/20/1989 for $495,000.
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 20107 Portside Drive, Walnut, including title documents, transfer conditions, mortgages and liens.
| Purchase date | Purchase price | Buyer name | Seller name |
|---|---|---|---|
| 12/20/1989 | $495,000 | Register | Register |
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 20107 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 | $11,306 |
| Current property tax | $12,583 |
| Market value | $960,869 |
| 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 |
|---|---|---|
| 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 20107 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 | $960,869 | 1.1766 | $11,306 | +1.93% |
| 2024-2025 | $942,030 | 1.1774 | $11,091 | +3.73% |
| 2023-2024 | $923,560 | 1.1578 | $10,693 | +2.22% |
| 2022-2023 | $905,452 | 1.1553 | $10,461 | +1.51% |
| 2021-2022 | $887,699 | 1.1609 | $10,305 | +1.36% |
The complete history of permits filed for 20107 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 20107 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 20107 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) |
|---|---|---|---|---|---|
| Montessori School Of Diamond Bar | NR | Private | PK-K | 28 | 0.98 |
| Montessori School Of Diamond Bar | NR | Private | PK-K | 28 | 0.98 |
| Tzu Chi Elementary School - Walnut | NR | Private | K-5 | 53 | 1.10 |
| Shelyn Elementary School | 7 | Public | K-6 | 453 | 1.12 |
| Castle Rock Elementary School | 7 | Public | K-5 | 646 | 1.20 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Elite Open School | NR | Private | 5-12 | 43 | 1.37 |
| Rowland Adult And Community Education | NR | Public | 0 | 1.54 | |
| Ybarra Academy For The Arts And Technology | 7 | Public | K-8 | 596 | 1.62 |
| Wisdom Kids College | NR | Private | K-8 | 0 | 1.68 |
| Elite Open School | NR | Private | 5-12 | 70 | 1.69 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Elite Open School | NR | Private | 5-12 | 43 | 1.37 |
| John A. Rowland High School | 8 | Public | 9-12 | 2,025 | 1.49 |
| Rowland Adult And Community Education | NR | Public | 0 | 1.54 | |
| Diamond Bar High School | 10 | Public | 9-12 | 2,557 | 1.54 |
| Elite Open School | NR | Private | 5-12 | 70 | 1.69 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 20107 Portside Drive, Walnut.