Alameda County property record for 17270 Roberto St, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,032 sqft · built 1938 |
| Lot Size | 0.159 acres (6,930 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $165,000 (Feb 1999) |
| Tax Bill | $3,870 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 80A-234-14 |
| Primary APN | 80A-234-14 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 1,032 sqft Living Area |
| Year Built | Built 1938 |
|---|---|
| Effective Year Built | Effective 1938 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,930 sqft (0.159 acres) |
| View / Lot | Average |
| Parking Spaces | 1 Parking Space |
| Street Address | 17270 ROBERTO ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3827 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00014 BLK: AR: 080A PAGE: 0234 |
| Legal Subdivision | EL PORTAL |
| Legal Lot Number | 513 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3018 |
| Census Tract | 430500 |
Source: Alameda County records, as of August 5, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 17270 ROBERTO ST, CASTRO VALLEY, CA 94546-3827 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Feb 16, 1999 · Amount on Record |
| Deed Sale | Feb 16, 1999 · Amount on Record |
| Prior Sale | Dec 27, 1996 · Amount on Record |
| Deed Document Number | 199965264 |
| Prior Transfer Date | Dec 15, 1996 |
| Prior Transfer Doc | 0000328857 |
| Record Updated | Oct 29, 2026 |
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | San Lorenzo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $256,829 (-0.71%) Land $79,948 Building $183,881 | ||
| 2025 | $3,870.00 (+3.61%) Homeowner's exemption | $258,657 (+4.04%) Land $78,381 Building $180,276 | |
| 2023 | $3,735.00 | $248,615 Land $75,338 Building $173,277 | $595,440 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 796 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 · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Etheric Networks, GeoLinks, T-Mobile, Unwired, Verizon.
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