Alameda County property record for 19675 Alvertus Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4 ba · 2,627 sqft · built 1957 |
| Lot Size | 0.122 acres (5,292 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $2,463 (2025) |
| Deeds & Mortgages | Sep 2026 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 84B-546-38-2 |
| Primary APN | 84B-546-38-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,627 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1959 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 5,292 sqft (0.122 acres) |
| Street Address | 19675 ALVERTUS AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3307 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00008 BLK: 000B TR: 1779 |
| Legal Subdivision | TRACT 1779 FILED OCTOBER 3 1956 |
| Legal Tract | 1779 |
| Legal Block | B |
| Legal Lot Number | 8 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 430700 |
19675 Alvertus Ave is owned by a company that acquired it in September 2026.
Source: Alameda County records, as of October 22, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 45 MARNE AVE, SAN FRANCISCO, CA 94127-1647 |
| Owner Type | Company |
| Vesting | Life Tenant |
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 | 2 Names on Deed |
|---|---|
| Last Transfer Date | Sep 14, 2026 |
| Transfer Doc | 0000119756 |
| Record Updated | Oct 29, 2026 |
| Document Type | Affidavit of Death of Trustee |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Sep 21, 2026 |
| Property Address | 19675 ALVERTUS AVE, CASTRO VALLEY, CA 94546-3307 |
| Document Number | 0000119756 |
| Instrument Date | Sep 14, 2026 |
| Instrument | 2026119756 |
| Transaction Type | Transfer |
| Record Updated | Oct 22, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Life Tenant |
| Address | 45 MARNE AVE, SAN FRANCISCO, CA 94127-1647 |
The 2025 property tax bill for 19675 Alvertus Ave was $2,463.
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 | $137,794 (+2%) Land $50,516 Building $87,278 | ||
| 2025 | $2,463.00 | $135,093 Land $49,526 Building $85,567 | |
| 2023 | $2,336.00 | $129,847 Land $47,603 Building $82,244 | $1,655,010 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 19675 Alvertus Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2009.
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 | 2 in force |
| Nearby Flood Claims | 2 (2009–2010) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Jan 2010 · 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 19675 Alvertus 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 609 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 in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile, Unwired, Verizon.
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