Alameda County property record for 1920 Knox St, Castro Valley, CA 94546
| Property Type | Medical Building |
|---|---|
| Details | 3,008 sqft · built 1963 |
| Lot Size | 0.248 acres (10,800 sqft) |
| Owner | Trust Name on File |
| Last Sale | $400,000 (Dec 2002) |
| Tax Bill | $9,177 (2025) |
| Deeds & Mortgages | Aug 2018 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 415-100-124 |
| Primary APN | 415-100-124 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 3,008 sqft Total Area |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1963 |
| Architectural Style | L-Shape |
| Exterior Material | Concrete Block |
| Construction Type | Wood |
| Fire Resistance | Wood or Wood & Steel Frame |
| Roof Type | Flat |
| Lot Area | 10,800 sqft (0.248 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Street Address | 1920 KNOX ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-7034 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Medical Building |
| Legal Description | LOT: 00124 BLK: AR: 0415 PAGE: 0100 |
| Legal Subdivision | KNOX |
| Legal Block | A |
| Legal Lot Number | 13-16 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1012 |
| Census Tract | 431200 |
1920 Knox St, a commercial property, is held in a trust since October 2013.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 42 GOLF RD, PLEASANTON, CA 94566-9752 |
| 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 Sale | Dec 20, 2002 · Amount on File |
| Deed Sale | Dec 20, 2002 · Amount on File |
| Deed Document Number | 2002597957 |
| Last Transfer Date | Oct 14, 2013 |
| Transfer Doc | 0000333296 |
| Record Updated | Oct 29, 2026 |
| Document Type | Affidavit of Death |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Aug 24, 2018 |
| Property Address | 1920 KNOX ST, CASTRO VALLEY, CA 94546-7034 |
| Document Number | 0000166495 |
| Instrument Date | Aug 21, 2018 |
| Instrument | 166495 |
| Transaction Type | Transfer |
| Record Updated | Mar 26, 2020 |
| Title Company | ATTORNEY ONLY |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 5213 INDEPENDENCE DR PLEASANTON CA 945667834, PLEASANTON, CA 94566-7834 |
The 2025 property tax bill for 1920 Knox St was $9,177.
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 | $590,864 (+2%) Land $221,574 Building $369,290 | |
| 2025 | $9,177.00 | $579,280 Land $217,230 Building $362,050 |
| 2023 | $8,723.00 | $556,792 Land $208,797 Building $347,995 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1920 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 A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 15 policies |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 15 in force |
| Nearby Flood Claims | 1 (1996) |
| Most Recent Claim | Dec 1996 · rainfall accumulation |
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 1920 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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