Alameda County property record for 1797 Knox St, Castro Valley, CA 94546
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 3 ba · 1,998 sqft · built 1974 |
| Lot Size | 0.113 acres (4,914 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $6,359 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 415-220-89 |
| Primary APN | 415-220-89 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 1,998 sqft Living Area |
| Year Built | Built 1974 |
|---|---|
| Effective Year Built | Effective 1974 |
| Construction Type | Wood |
| Lot Area | 4,914 sqft (0.113 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 1797 KNOX ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-6917 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | LOT: 0000A BLK: PM: 0076 PAGE: 0073 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 431200 |
1797 Knox St, a duplex, is held in a trust since September 2015.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 22303 N 5TH ST, CASTRO VALLEY, CA 94546-7005 |
| Owner Type | Company |
| Vesting | Trust |
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 Transfer Date | Sep 1, 2015 |
| Transfer Doc | 0000251692 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 1797 Knox St was $6,359.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Hayward Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $396,783 (+2%) Land $119,035 Building $277,748 | |
| 2025 | $6,359.00 | $389,004 Land $116,701 Building $272,303 |
| 2023 | $6,036.00 | $373,900 Land $112,170 Building $261,730 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1797 Knox 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 | 5 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 1797 Knox 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 744 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, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| 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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