Alameda County property record for 20000 Gem Ct, Castro Valley, CA 94546 · Last verified October 2025
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 1 Baths |
| Year Built | Built 1950 |
| Square Footage | 1,060 sqft Living Area |
| Lot Size | 12,911 sqft (0.296 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $610,000 (2005) |
| Tax Bill | $10,819.00 (2025) |
| Primary APN | 84C-1063-29 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Baths |
| Total Rooms | 5 Rooms |
| Building Area | 1,060 sqft Living Area |
| Stories | 1 Stories |
| Year Built | Built 1950 |
|---|---|
| Architectural Style | Other Style |
| Construction Type | Wood Construction |
| Lot Area | 12,911 sqft (0.296 acres) |
| Street Address | 20000 GEM CT |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4742 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | TRACT 979 BLK 2 LOT 7 |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-1063-29
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 | Owner Name on File |
|---|---|
| Mailing Address | 20000 GEM CT, CASTRO VALLEY, CA 94546-4742 |
| Occupancy | Owner Occupied |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jun 30, 2005 · Amount on Record |
| Deed Sale | Jun 30, 2005 · Amount on Record |
| Prior Sale | Jun 30, 2005 · Amount on Record |
| Deed Doc Number | 0000267840 |
| Last Transfer Date | Jul 23, 2009 |
| Transfer Doc | 0000236014 |
| Record Refreshed | Jun 07, 2026 |
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 is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $10,819.00 (+3.9%) Homeowner's exemption | $850,205 (+4.04%) Land $255,061 Building $595,144 |
| 2023 | $10,413.00 Homeowner's exemption | $817,198 Land $245,159 Building $572,039 |
20000 Gem Ct is in FEMA Zone X, outside the Special Flood Hazard Area, with no wildfire exposure.
Source: FEMA National Flood Hazard Layer · Alameda County (06001C), updated May 25, 2026
| FEMA Flood Zone | Zone X minimal flood hazard · outside the 0.2% annual chance floodplain |
|---|---|
| Special Flood Hazard Area | No |
| Nearest Special Flood Hazard Area | Zone A, within 100 ft |
Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020
| Wildfire Risk to Homes | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach of burnable land |
Values are read at the parcel center point; lenders make the official flood determination.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures