Alameda County property record for 4448 Gem Ave, Castro Valley, CA 94546 · Last verified October 2025
| Property Type | Residential > Multi-Unit > Duplex |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 3 Baths |
| Year Built | Built 1950 |
| Square Footage | 2,363 sqft Total Area |
| Lot Size | 17,135 sqft (0.393 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $1,300,000 (2024) |
| Tax Bill | $11,445.00 (2025) |
| Primary APN | 84C-1063-28 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 7 Rooms |
| Building Area | 2,363 sqft Total Area |
| Gross Area | 1,920 sqft Gross Area |
| Stories | 1 Stories |
| Year Built | Built 1950 |
|---|---|
| Architectural Style | Other Style |
| Construction Type | Wood Construction |
| Lot Area | 17,135 sqft (0.393 acres) |
| Parking Spaces | 1 Parking Spaces |
| Total Buildings | 2 Total Buildings |
| Street Address | 4448 GEM AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4741 |
| Property Usage | Residential Property Usage |
| Type | Residential > Multi-Unit > Duplex |
| Legal Subdivision | 979 |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-1063-28
Assessment roll updated July 1, 2025 · Last verified October 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Co-owner | Verified Secondary Owner |
| Mailing Address | 4448 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity, Secondary Owner is a Company |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | May 21, 2024 · Amount on Record |
| Deed Sale | May 21, 2024 · Amount on Record |
| Prior Sale | Mar 17, 2015 · Amount on Record |
| Deed Doc Number | 2024063030 |
| Record Refreshed | Jun 07, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4448 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000270287 |
| Instrument Date | Oct 06, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Jan 06, 2021 |
| Title Company | OLD REPUBLIC TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 4448 GEM AVE CASTRO VALLEY CA 945464741, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000270287 |
|---|---|
| Date | Oct 13, 2020 |
| Instrument | 270287 |
| Name | CALIFORNIA FINCL & REAL ESTATE CTR INC CALIFORNIA FINCL & REAL ESTATE CTR INC |
|---|---|
| Type | Bank |
| Address | HUNTINGTON BEACH, CA 92649 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Oct 12, 2050 |
Source: Alameda County records · Assessment roll updated July 1, 2025 · Last verified October 2025
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $11,445.00 (+70.95%) Homeowner's exemption | $890,080 (+76.6%) Land $267,024 Building $623,056 |
| 2023 | $6,695.00 Homeowner's exemption | $504,018 Land $151,145 Building $352,873 |
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