Alameda County property record for 17658 Walnut Rd, Castro Valley, CA 94546 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 1,681 sqft · built 1953 |
| Lot Size | 0.247 acres (10,740 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $580,000 (Dec 2007) |
| Tax Bill | $11,939 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84D-1180-2-1 |
| Primary APN | 84D-1180-2-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,681 sqft Living Area |
| Gross Area | 322 sqft |
| Basement Area | 322 sqft |
| Finished Basement | 322 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | L-Shape |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Composition Shingle |
| Lot Area | 10,740 sqft (0.247 acres) |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 17658 WALNUT RD |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-1352 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00001 BLK: 0002 AR: 084D PAGE: 1180 |
| Legal Subdivision | PERATA |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 430300 |
Source: Alameda County records · APN 84D-1180-2-1
Assessment roll updated June 20, 2025 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 17658 WALNUT RD, CASTRO VALLEY, CA 94546-1352 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 31, 2007 · Amount on Record |
| Deed Sale | Dec 31, 2007 · Amount on Record |
| Deed Document Number | 2007436160 |
| Prior Transfer Date | Jan 08, 1999 |
| Prior Transfer Doc | 0000012066 |
| Record Updated | Sep 20, 2026 |
Source: Alameda County records · Assessment roll updated June 20, 2025 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $11,939.00 (+20.15%) Homeowner's exemption | $787,671 (+3.12%) Land $228,536 Building $566,135 | |
| 2024 | $9,937.00 (+1.62%) | ||
| 2023 | $9,779.00 Homeowner's exemption | $763,820 Land $219,664 Building $544,156 | $1,092,600 |
Source: FEMA National Flood Hazard Layer, Alameda County (06001C), updated May 25, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060014303003, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 1 in force |
| Wildfire Risk | Moderate above 47% of the US · above 28% of California |
|---|---|
| Wildfire Likelihood | About 1 in 1,075 per year |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 293 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| Verizon | Fixed Wireless | 300 / 20 |
| AT&T | Fixed Wireless | 100 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: T-Mobile USA, Etheric Communications, LLC., Sonic Telecom, AT&T. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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