Alameda County property record for 20347 Stanton Ave, Castro Valley, CA 94546
| Property Type | Duplex |
|---|---|
| Details | 5 bd · 2 ba · 1,964 sqft · built 1962 |
| Lot Size | 0.151 acres (6,581 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $260,000 (Dec 2010) |
| Tax Bill | $8,028 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84A-216-24-2 |
| Primary APN | 84A-216-24-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,964 sqft Living Area |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1962 |
| Construction Type | Wood |
| Lot Area | 6,581 sqft (0.151 acres) |
| Street Address | 20347 STANTON AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-5267 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | LOT: 00002 BLK: 0024 AR: 084A PAGE: 0216 |
| Legal Subdivision | STANTON 01 |
| Legal Tract | 1 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 430600 |
Source: Alameda County records, as of August 5, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | PO BOX 2072, CASTRO VALLEY, CA 94546-0072 |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 30, 2010 · Amount on Record |
| Deed Sale | Dec 30, 2010 · Amount on Record |
| Deed Document Number | 2010393443 |
| Prior Transfer Date | May 6, 2007 |
| Prior Transfer Doc | 0000185464 |
| Record Updated | Sep 20, 2026 |
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 | $555,355 (+2%) Land $166,606 Building $388,749 | |
| 2025 | $8,028.00 (+4.69%) | $544,467 (+4.04%) Land $163,340 Building $381,127 |
| 2023 | $7,668.00 | $523,331 Land $156,999 Building $366,332 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 709 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 in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile.
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