| Primary address | 20820 Oak Street, Castro Valley |
| Zip code | 94546 |
| County | Alameda |
| Parcel ID | 415-10-33-5 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Property tax | $0 |
| Building class | Exempt Public Agency (0300) |
| Acreage | 6.87 |
| Zoning district | Retail Business (C1) |
| 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:
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 20820 Oak Street, Castro Valley, including title documents, transfer conditions, mortgages and liens.
Access detailed property tax data for 20820 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 |
| Property tax | $0 |
| Market value | $0 |
The complete history of permits filed for 20820 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 20820 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 20820 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) |
|---|---|---|---|---|---|
| Crossroads Christian Elementary School | NR | Private | K-6 | 0 | 0.27 |
| Strobridge Elementary School | NR | Public | K-6 | 362 | 0.30 |
| Camelot School | NR | Private | K | 14 | 0.62 |
| The Montessori Giving Tree | NR | Private | K-6 | 12 | 0.74 |
| Liber Community School | NR | Private | 4-12 | 0 | 0.74 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Liber Community School | NR | Private | 4-12 | 0 | 0.74 |
| Knowledge Enlightens You (Key) Academy | 5 | Charter | K-8 | 614 | 0.89 |
| Our Lady Of Grace School | NR | Private | K-8 | 218 | 1.03 |
| Hayward Adult | NR | Public | 0 | 1.11 | |
| Anchor Education, Inc. School | NR | Private | 3-12 | 0 | 1.22 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Liber Community School | NR | Private | 4-12 | 0 | 0.74 |
| Hayward Adult | NR | Public | 0 | 1.11 | |
| Brenkwitz High School | 2 | Public | 9-12 | 179 | 1.15 |
| Anchor Education, Inc. School | NR | Private | 3-12 | 0 | 1.22 |
| Sterling West San Francisco Campus | NR | Private | 3-11 | 27 | 1.23 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 20820 Oak Street, Castro Valley.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 21395 Foothill Blvd, Hayward | 1,712 | ||
| 914 Blossom Way, Hayward | 1,775 | 12/01/2020 | $820,000 |
| 1218 Grove Way, Hayward | 1,676 | 04/30/2014 | $415,000 |
| 21360 Ocean View Dr, Hayward | 5,055 | ||
| 21390 Ocean View Dr, Hayward | 1,156 | 03/10/2005 | $365,000 |
| 1248 Grove Way, Hayward | 1,566 | 10/26/2012 | |
| 20632 Fuchsia CT, Hayward | 616 | ||
| 21446 Montgomery Ave, Hayward | 1,322 | 02/21/1990 | $207,000 |
| 21274 Birch St, Hayward | 2,391 | ||
| 803 Cherry Way, Hayward | 2,619 | 08/29/2025 | $1,349,000 |
| 1234 Grove Way, Hayward | 1,028 | 01/30/2017 | |
| 1262 Grove Way, Hayward | 2,990 | 09/11/2025 | |
| 761 Medford Ave, Hayward | 3,679 | 10/05/1999 | |
| 21459 Locust St, Hayward | 1,893 | 12/16/2024 | |
| 21288 Mission Blvd, Hayward | 1,906 | 07/11/2014 | |
| 21163 Ocean View Dr, Hayward | 2,388 | 05/19/1999 | $228,000 |
| 20810 Foothill Blvd, Hayward | |||
| 21313 Foothill Blvd, Hayward | 12/19/2003 | ||
| 21266 Birch St, Hayward | 1,382 | ||
| 21406 Ocean View Dr, Hayward | 1,020 | 12/13/2024 | $810,000 |