Alameda County property record for 20031 Gem Ct, Castro Valley, CA 94546 · Last verified May 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 2.5 Baths |
| Year Built | Built 1969 |
| Square Footage | 2,032 sqft Living Area |
| Lot Size | 8,874 sqft (0.204 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $1,100,000 (2024) |
| Tax Bill | $13,783.00 (2025) |
| Primary APN | 84C-1064-58 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Partial Baths | 1 Partial Baths |
| Total Rooms | 8 Rooms |
| Building Area | 2,032 sqft Living Area |
| Stories | 2 Stories |
| Fireplace | Fireplace |
| Fireplaces | 1 Fireplaces |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1969 |
| Exterior Material | Wood Siding Exterior |
| Construction Type | Wood Construction |
| Roof Material | Roll Tar & Gravel Roof |
| Lot Area | 8,874 sqft (0.204 acres) |
| Parking Spaces | 1 Parking Spaces |
| Heating System | Floor/Wall Furnace Heating |
|---|---|
| Sewage | Municipal Sewage |
| Water Source | Commercial Water Source |
| Street Address | 20031 GEM CT |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4742 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT: 00015 BLK: 0002 TR: 0979 |
| Legal Tract | 0979 |
| Legal Block | 2 |
| Legal Lot Number | 15 |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-1064-58
Assessment roll updated June 20, 2025 · Last verified May 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 20031 GEM CT, CASTRO VALLEY, CA 94546-4742 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Aug 20, 2024 · Amount on Record |
| Deed Sale | Aug 20, 2024 · Amount on Record |
| Prior Sale | Jun 16, 2000 · Amount on Record |
| Deed Doc Number | 2024101412 |
| Prior Transfer Date | Jun 10, 2008 |
| Prior Transfer Doc | 0000187588 |
| Record Refreshed | Jun 08, 2026 |
Source: Alameda County records · Assessment roll updated June 20, 2025 · Last verified May 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, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $13,783.00 (+115.16%) | $1,094,400 (+131.52%) Land $330,000 Building $770,000 | |
| 2023 | $6,406.00 | $472,710 Land $147,722 Building $324,988 | $931,140 |
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