| Primary address | 21438 Oak Street, Castro Valley |
| Alternate address(es) | 21440 Oak St |
| Zip code | 94546 |
| County | Alameda |
| Parcel ID | 415-160-17 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Current property tax | $783 |
| Building sqft | 1,120 |
| Total sqft | 1,120 |
| Building class | Single Family Residential Homes Used as Such (1100) |
| Acreage | 0.17 |
| Buildings on lot | 2 |
| Units | 1 |
| Year built | 1959 |
| Stories | 1 |
| Bedrooms | 3 |
| Bathrooms | 1 |
| Zoning district | Multiple Residential (R4) |
| School district | Hayward Unif SCH |
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:
21438 Oak Street, Castro Valley, CA 94546 was built in 1959 and has a total of 1,120 square feet.
What is the assessed value of 21438 Oak Street, Castro Valley, CA 94546 and the property tax paid?Assessed at $73,798, the tax amount paid for 21438 Oak Street, Castro Valley, CA 94546 is $865.
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 21438 Oak Street, Castro Valley, including title documents, transfer conditions, mortgages and liens.
Access detailed property tax data for 21438 Oak Street, Castro Valley, CA 94546. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Base tax | $865 |
| Current property tax | $783 |
| Market value | $73,798 |
Here's the assessment & property tax history for 21438 Oak Street, Castro Valley, 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 | $73,798 | 1.1724 | $865 | +0.98% |
| 2024-2025 | $72,351 | 1.1842 | $857 | -22.76% |
| 2023-2024 | $70,932 | 1.5638 | $1,109 | +34.17% |
| 2022-2023 | $69,542 | 1.1888 | $827 | +0.82% |
| 2021-2022 | $68,178 | 1.2028 | $820 | +1.16% |
The complete history of permits filed for 21438 Oak Street, Castro Valley, including new construction or demolition permits, 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 Castro Valley so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Castro Valley and compare it to other neighborhoods in Alameda County.
Check out recently sold homes in Castro-Valley and see how their prices compare.
Create a free account to unlock extended information for 21438 Oak Street, Castro Valley, 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 21438 Oak Street, Castro Valley 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) |
|---|---|---|---|---|---|
| Strobridge Elementary School | NR | Public | K-6 | 362 | 0.20 |
| Liber Community School | NR | Private | 4-12 | 0 | 0.46 |
| The Montessori Giving Tree | NR | Private | K-6 | 12 | 0.47 |
| Crossroads Christian Elementary School | NR | Private | K-6 | 0 | 0.51 |
| Harder Elementary School | 3 | Public | K-6 | 675 | 0.79 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Liber Community School | NR | Private | 4-12 | 0 | 0.46 |
| Knowledge Enlightens You (Key) Academy | 5 | Charter | K-8 | 614 | 0.79 |
| Hayward Adult | NR | Public | 0 | 0.97 | |
| Special Education-Preschool-Laurel | NR | Public | 1 | 1.08 | |
| Faith Ringgold School of Arts and Science | 1 | Public | K-8 | 111 | 1.13 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Liber Community School | NR | Private | 4-12 | 0 | 0.46 |
| Stellar Preparatory High School | NR | Private | 9-11 | 26 | 0.97 |
| Hayward Adult | NR | Public | 0 | 0.97 | |
| Brenkwitz High School | 2 | Public | 9-12 | 179 | 1.00 |
| Special Education-Preschool-Laurel | NR | Public | 1 | 1.08 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21438 Oak Street, Castro Valley.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 22377 N 4th St, Castro Valley | 1,194 | 06/22/2022 | |
| 22072 Baywood Ave, Castro Valley | 1,440 | 04/19/1996 | |
| 1554 Knox St, Castro Valley | 1,572 | 05/13/2016 | |
| 1551 Knox St, Castro Valley | 2,099 | 02/06/2017 | |
| 1945 Leila St, Castro Valley | 990 | 11/07/2018 | |
| 21406 Oak St, Castro Valley | |||
| 21694 Shadyspring Rd, Castro Valley | 2,456 | 11/06/2024 | $1,265,000 |
| 22295 N 3rd St, Castro Valley | |||
| 1796 Knox St, Castro Valley | 1,751 | 07/06/2023 | |
| 1777 Knox St, Castro Valley | 1,272 | 10/07/2005 | $616,000 |
| 1569 Knox St, Castro Valley | 897 | 07/16/2024 | |
| 1572 Knox St, Castro Valley | 810 | ||
| 1788 Knox St, Castro Valley | 1,456 | 05/06/2003 | $125,000 |
| 1772 Knox St, Castro Valley | 941 | 01/16/2004 | |
| 22200 N 3rd St, Castro Valley | 05/24/1991 | $60,000 | |
| 1969 Leila St, Castro Valley | 1,200 | 06/29/2021 | |
| 1765 Knox St, Castro Valley | 1,344 | 08/18/2003 | |
| 1683 Knox St, Castro Valley | 828 | 06/10/1996 | $146,000 |
| 1629 Knox St, Castro Valley | 1,494 | 10/01/2018 | $782,000 |
| 1587 Knox St, Castro Valley | 1,863 | 11/06/2017 | $727,000 |