Alameda County property record for 21696 Knuppe Pl, Castro Valley, CA 94552
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5 ba · 4,414 sqft · built 2004 |
| Lot Size | 3.07 acres (133,730 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $833,000 (Feb 2011) |
| Tax Bill | $13,439 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 85A-6409-5 |
| Primary APN | 85A-6409-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 4,414 sqft Living Area |
| Year Built | Built 2004 |
|---|---|
| Effective Year Built | Effective 2004 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 133,730 sqft |
| Parking Spaces | 3 Parking Spaces |
| Street Address | 21696 KNUPPE PL |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-5120 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 0000D BLK: PM: 0174 PAGE: 0029 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2012 |
| Census Tract | 430101 |
Source: Alameda County records, as of August 5, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 21696 KNUPPE PL, CASTRO VALLEY, CA 94552-5120 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Feb 23, 2011 · Amount on Record |
| Deed Sale | Feb 23, 2011 · Amount on Record |
| Prior Sale | Oct 31, 2000 · Amount on Record |
| Deed Document Number | 201163548 |
| Prior Transfer Date | Jul 19, 2007 |
| Prior Transfer Doc | 0000275669 |
| Record Updated | Oct 29, 2026 |
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 | $1,087,191 (+2%) Land $490,020 Building $597,171 | ||
| 2025 | $13,439.00 (+3.78%) | $1,065,874 (+4.04%) Land $480,412 Building $585,462 | |
| 2023 | $12,950.00 | $1,024,499 Land $461,763 Building $562,736 | $1,722,240 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 70% of the US · above 45% of California |
|---|---|
| Wildfire Likelihood | 0.3% 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 35 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Starlink Satellite | 280 / 30 |
May also be available: Etheric Networks, T-Mobile, Unwired.
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