Alameda County property record for 4002 Berdina Rd, Castro Valley, CA 94546
| Property Type | Duplex |
|---|---|
| Details | 3 bd · 2 ba · 1,916 sqft · built 1965 |
| Lot Size | 0.165 acres (7,203 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $507,000 (Jul 2009) |
| Tax Bill | $9,826 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-757-7-2 |
| Primary APN | 84C-757-7-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 1,916 sqft Living Area |
| Year Built | Built 1965 |
|---|---|
| Effective Year Built | Effective 1965 |
| Construction Type | Wood |
| Lot Area | 7,203 sqft (0.165 acres) |
| Street Address | 4002 BERDINA RD |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3535 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | LOT: 00003 BLK: TR: 0542 |
| Legal Tract | 0542 |
| Legal Lot Number | 3 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 430800 |
4002 Berdina Rd, a duplex, is owned and occupied by two individuals who bought it in July 2009.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4002 BERDINA RD, CASTRO VALLEY, CA 94546-3535 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 29, 2009 · Amount on File |
| Deed Sale | Jul 29, 2009 · Amount on File |
| Deed Document Number | 2009242886 |
| Prior Transfer Date | Jan 26, 1999 |
| Prior Transfer Doc | 0000189309 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4002 Berdina Rd was $9,826 with a homeowner's exemption.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $660,485 (+0.93%) Land $200,245 Building $467,240 | |
| 2025 | $9,826.00 Homeowner's exemption | $654,400 Land $196,320 Building $458,080 |
| 2023 | $9,354.00 Homeowner's exemption | $628,994 Land $188,698 Building $440,296 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4002 Berdina Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 4002 Berdina Rd is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 704 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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