Alameda County property record for 20670 Forest Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,470 sqft · built 1941 |
| Lot Size | 0.161 acres (7,047 sqft) |
| Owner | Owner Name on File |
| Last Sale | $505,500 (Nov 2014) |
| Tax Bill | $7,948 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-716-9 |
| Primary APN | 84C-716-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,470 sqft Living Area |
| Year Built | Built 1941 |
|---|---|
| Architectural Style | Other |
| Construction Type | Wood |
| Lot Area | 7,047 sqft (0.161 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 20670 FOREST AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4531 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 4 |
| Census Block | 4001 |
| Census Tract | 430800 |
The current owner of 20670 Forest Ave bought it in November 2014.
Source: Alameda County records, as of October 20, 2025
| Owner of Record | Owner Name on File |
|---|---|
| Mailing Address | 20670 FOREST AVE, CASTRO VALLEY, CA 94546-4531 |
| Occupancy | Owner Occupied |
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 | Nov 26, 2014 · Amount on File |
| Deed Sale | Nov 26, 2014 · Amount on File |
| Prior Sale | May 15, 2013 · Amount on File |
| Deed Document Number | 2014285654 |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 20670 Forest Ave was $7,948 with a homeowner's exemption.
Source: Alameda County assessment roll, as of July 1, 2025
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $7,948.00 Homeowner's exemption | $606,913 Land $204,307 Building $402,606 |
| 2023 | $7,637.00 Homeowner's exemption | $583,350 Land $196,375 Building $386,975 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 20670 Forest Ave in Zone X, an area of minimal flood risk.
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 | 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 20670 Forest Ave 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 777 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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