Alameda County property record for 4082 Wilson Ave, Castro Valley, CA 94546
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,806 sqft · built 1949 |
| Lot Size | 0.172 acres (7,500 sqft) |
| Owner | Trust Name on File |
| Last Sale | $475,000 (Aug 2010) |
| Tax Bill | $8,783 (2025) |
| Deeds & Mortgages | Nov 2020 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 84D-1351-13 |
| Primary APN | 84D-1351-13 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,806 sqft Living Area |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Construction Type | Wood |
| Lot Area | 7,500 sqft (0.172 acres) |
| Street Address | 4082 WILSON AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3146 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | LOT: 00013 BLK: AR: 084D PAGE: 1351 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2001 |
| Census Tract | 430700 |
4082 Wilson Ave, a duplex, is held in a trust since September 2020.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 18851 CALIFORNIA ST, CASTRO VALLEY, CA 94546-3125 |
| Owner Type | Company |
| Vesting | Trust |
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 | Name on Deed |
|---|---|
| Last Sale | Aug 5, 2010 · Amount on File |
| Deed Sale | Aug 5, 2010 · Amount on File |
| Prior Sale | Dec 16, 2009 · Amount on File |
| Deed Document Number | 2010223762 |
| Last Transfer Date | Sep 28, 2020 |
| Transfer Doc | 0000318866 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Nov 20, 2020 |
| Property Address | 4082 WILSON AVE, CASTRO VALLEY, CA 94546-3146 |
| Document Number | 0000318866 |
| Instrument Date | Sep 28, 2020 |
| Instrument | 318866 |
| Transaction Type | Transfer |
| Record Updated | Feb 4, 2021 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 18851 CALIFORNIA ST CASTRO VALLEY CA 945463125, CASTRO VALLEY, CA 94546-3125 |
The 2025 property tax bill for 4082 Wilson Ave was $8,783.
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 | $620,691 (+2%) Land $186,207 Building $434,484 | |
| 2025 | $8,783.00 | $608,521 Land $182,556 Building $425,965 |
| 2023 | $8,399.00 | $584,900 Land $175,470 Building $409,430 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4082 Wilson Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1998.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 5 in force |
| Nearby Flood Claims | 1 (1998) |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
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.
Wildfire risk around 4082 Wilson Ave 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 | Direct burnable vegetation |
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 938 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 in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile, Unwired, Verizon.
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