Alameda County property record for 20030 Gem Ct, Castro Valley, CA 94546 · Last verified August 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1950 |
| Square Footage | 1,492 sqft Living Area |
| Lot Size | 17,902 sqft (0.411 acres) |
| Occupancy | Owner Occupied |
| Tax Bill | $1,908.00 (2025) |
| Primary APN | 84C-1064-54 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Building Area | 1,492 sqft Living Area |
| Stories | 1 Stories |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Construction Type | Wood Construction |
| Lot Area | 17,902 sqft (0.411 acres) |
| Street Address | 20030 GEM CT |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4742 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT: 00011 BLK: 0002 TR: 0979 ;LOT: 00054 BLK: AR: 084C PAGE: 1064 |
| Legal Tract | 0979 |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-1064-54
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 | Company Name on File |
|---|---|
| Mailing Address | 20030 GEM CT, CASTRO VALLEY, CA 94546-4742 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is a Company |
| Vesting | Owner is a Trust, Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Feb 24, 1995 |
| Transfer Doc | 0000047963 |
| 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 | $89,911 (-5.37%) Land $47,515 Building $49,396 | ||
| 2025 | $1,908.00 (+6.24%) Homeowner's exemption | $95,011 (+4.04%) Land $46,584 Building $48,427 | |
| 2023 | $1,796.00 Homeowner's exemption | $91,322 Land $44,775 Building $46,547 | $898,650 |
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