Alameda County property record for 3880 Modesto St, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,059 sqft · built 1924 |
| Lot Size | 0.116 acres (5,046 sqft) |
| Owner | Individual Name on File |
| Last Sale | $172,000 (Mar 1994) |
| Tax Bill | $4,236 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-766-15-1 |
| Primary APN | 84C-766-15-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 1,059 sqft Living Area |
| Year Built | Built 1924 |
|---|---|
| Effective Year Built | Effective 1935 |
| Architectural Style | L-Shape |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Composition Shingle |
| Lot Area | 5,046 sqft (0.116 acres) |
| Garage Type | Detached |
| Heating System | Floor/Wall Furnace |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 3880 MODESTO ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4439 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: BLK: 0001 TR: 0951 |
| Legal Tract | 0951 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 4 |
| Census Block | 4004 |
| Census Tract | 430800 |
3880 Modesto St is owned and occupied by an individual who bought it in March 1994.
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 | Individual Name on File |
|---|---|
| Mailing Address | 3880 MODESTO ST, CASTRO VALLEY, CA 94546-4439 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 1, 1994 · Amount on File |
| Deed Sale | Mar 1, 1994 · Amount on File |
| Deed Document Number | 199478611 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 3880 Modesto St was $4,236 with a homeowner's exemption.
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 | $291,177 (-0.39%) Land $89,453 Building $208,724 | ||
| 2025 | $4,236.00 Homeowner's exemption | $292,330 Land $87,699 Building $204,631 | |
| 2023 | $4,047.00 Homeowner's exemption | $280,980 Land $84,294 Building $196,686 | $796,590 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3880 Modesto St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 1 in force |
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.
The area around 3880 Modesto St has no burnable land within ember reach, so its wildfire risk is not rated.
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 704 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 · 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 Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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