Alameda County property record for 3975 Mabel Ave, Castro Valley, CA 94546
| Property Type | Single Family Home (2+ on Parcel) |
|---|---|
| Details | 4 bd · 2 ba · 1,600 sqft · built 1941 |
| Lot Size | 0.235 acres (10,258 sqft) |
| Owner | 2 Owner Names on File |
| Last Sale | $285,000 (Jul 2005) |
| Tax Bill | $10,072 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84B-590-8 |
| Primary APN | 84B-590-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,600 sqft Living Area |
| Year Built | Built 1941 |
|---|---|
| Architectural Style | Other |
| Construction Type | Wood |
| Lot Area | 10,258 sqft (0.235 acres) |
| Total Buildings | 2 Buildings |
| Street Address | 3975 MABEL AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3447 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Single Family Home (2+ on Parcel) |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 430700 |
Source: Alameda County records · APN 84B-590-8
Assessment roll updated July 1, 2025 · Last verified October 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Owner Names on File |
|---|---|
| Mailing Address | 3975 MABEL AVE, CASTRO VALLEY, CA 94546-3447 |
| Occupancy | Owner Occupied |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jul 15, 2005 · Amount on Record |
| Deed Sale | Jul 15, 2005 · Amount on Record |
| Prior Sale | Apr 09, 2004 |
| Deed Document Number | 2005300404 |
| Record Updated | Jun 07, 2026 |
Source: Alameda County records · Assessment roll updated July 1, 2025 · Last verified October 2025
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $10,072.00 (+4.47%) Homeowner's exemption | $723,827 (+4.04%) Land $217,148 Building $506,679 |
| 2023 | $9,641.00 Homeowner's exemption | $695,725 Land $208,717 Building $487,008 |
Source: FEMA National Flood Hazard Layer, Alameda County (06001C), updated May 25, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060014307002, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 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 |
| Wildfire Risk | Low lower than 96% of the US · lower than 97.4% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
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.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · sampled at 704 locations within half a mile · Last verified October 2026
| 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 Communications, LLC. Fixed Wireless | 250 / 100 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: California Internet.
Source: EPA Safe Drinking Water Information System via ECHO, 2026 Q3 · EPA community water system boundaries v3.0, March 2026 · Last verified October 2026
| Water System | EAST BAY MUD serves 1,468,000 people |
|---|---|
| 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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.
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