Alameda County property record for 4297 Gem Ave, Castro Valley, CA 94546 · Last verified August 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1947 |
| Square Footage | 1,752 sqft Living Area |
| Lot Size | 6,615 sqft (0.152 acres) |
| Occupancy | Owner Occupied |
| Tax Bill | $3,311.00 (2025) |
| Primary APN | 84C-669-70 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Building Area | 1,752 sqft Living Area |
| Stories | 1 Stories |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1947 |
| Exterior Material | Aluminum/Vinyl Exterior |
| Construction Type | Wood Construction |
| Roof Material | Composition Shingle Roof |
| Lot Area | 6,615 sqft (0.152 acres) |
| Heating System | Floor/Wall Furnace Heating |
|---|
| Street Address | 4297 GEM AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4655 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT: 00032 BLK: 0002 TR: 0807 |
| Legal Tract | 0807 |
| Legal Block | 2 |
| Legal Lot Number | 32 |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3011 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-669-70
Assessment roll updated August 5, 2026 · Last verified August 2026
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 |
|---|---|
| Mailing Address | 4297 GEM AVE, CASTRO VALLEY, CA 94546-4655 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Jun 29, 2000 |
| Transfer Doc | 0000202156 |
| Record Refreshed | Sep 20, 2026 |
Source: Alameda County records · Assessment roll updated August 5, 2026 · Last verified August 2026
| 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 and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $146,745 (+2%) Land $43,106 Building $103,639 | ||
| 2025 | $3,311.00 (+7.57%) | $143,868 (+4.04%) Land $42,261 Building $101,607 | |
| 2023 | $3,078.00 | $138,282 Land $40,620 Building $97,662 | $1,103,940 |
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