Alameda County property record for 3975 Wilson Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 778 sqft · built 1946 |
| Lot Size | 0.114 acres (4,960 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $777,000 (Feb 2026) |
| Tax Bill | $2,639 (2025) |
| Deeds & Mortgages | Nov 2025 Mortgage Feb 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 84B-580-4-2 |
| Primary APN | 84B-580-4-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 778 sqft Living Area |
| Year Built | Built 1946 |
|---|---|
| Effective Year Built | Effective 1946 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 4,960 sqft (0.114 acres) |
| Street Address | 3975 WILSON AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3158 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00002 BLK: 0004 AR: 084B PAGE: 0580 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 430700 |
3975 Wilson Ave is owned and occupied by two individuals who bought it in February 2026.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 3975 WILSON AVE, CASTRO VALLEY, CA 94546-3158 |
| 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.
| Date | Document |
|---|---|
| Nov 19, 2025 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Feb 20, 2026 | Grant Deed, Transfer · Conventional Mortgage HSBC BANK USA |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Feb 20, 2026 · Amount on File |
| Deed Sale | Feb 20, 2026 · Amount on File |
| Prior Sale | Dec 24, 2009 · Amount on File |
| Deed Document Number | 202624434 |
| Prior Transfer Date | Jun 19, 1997 |
| Prior Transfer Doc | 0000171654 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 3975 WILSON AVE, CASTRO VALLEY, CA 94546-3158 |
| Transaction Type | Mortgage |
| Record Updated | Mar 30, 2026 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 3975 WILSON AVE, CASTRO VALLEY, CA 94546-3158 |
| Document Number | 0000145996 |
|---|---|
| Date | Nov 19, 2025 |
| Instrument | 2025145996 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | 585 SOUTH BLVD E, PONTIAC, MI 48341 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Dec 1, 2055 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Feb 20, 2026 |
| Property Address | 3975 WILSON AVE, CASTRO VALLEY, CA 94546-3158 |
| Document Number | 0000024434 |
| Instrument Date | Feb 12, 2026 |
| Instrument | 2026024434 |
| Transaction Type | Transfer |
| Record Updated | Mar 30, 2026 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $854.70 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Right of Survivorship |
| Address | 3975 WILSON AVE, CASTRO VALLEY, CA 94546-3158 |
| Document Number | 0000024435 |
|---|---|
| Date | Feb 20, 2026 |
| Instrument | 2026024435 |
| Name | HSBC BANK USA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Mar 1, 2056 |
The 2025 property tax bill for 3975 Wilson Ave was $2,639, up 2.8% from the year before.
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 | Assessed Market Value |
|---|---|---|---|
| 2026 | $153,041 (+2%) Land $107,991 Building $45,050 | ||
| 2025 | $2,639.00 (+2.76%) | $150,039 Land $105,873 Building $44,166 | |
| 2024 | $2,568.00 (+2.43%) | ||
| 2023 | $2,507.00 | $144,215 Land $101,763 Building $42,452 | $315,090 |
Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.
FEMA maps place 3975 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 3975 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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