Alameda County property record for 4430 Gem Ave, Castro Valley, CA 94546 · Last verified February 2026
| Property Type | Residential > Multi-Unit > Duplex |
|---|---|
| Bedrooms | 7 Beds |
| Bathrooms | 4 Baths |
| Architecture Style | Other |
| Year Built | Built 1984 |
| Square Footage | 2,561 sqft Total Area |
| Lot Size | 5,764 sqft (0.132 acres) |
| Occupancy | Owner Occupied |
| Tax Bill | $13,444.00 (2025) |
| Primary APN | 84C-1063-25 |
|---|---|
| Alternative APN |
|
| Bedrooms | 7 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 12 Rooms |
| Building Area | 2,561 sqft Total Area |
| Stories | 2 Stories |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1984 |
| Architectural Style | Other Style |
| Construction Type | Wood Construction |
| Lot Area | 5,764 sqft (0.132 acres) |
| Parking Spaces | 1 Parking Spaces |
| Street Address | 4430 GEM AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4741 |
| Property Usage | Residential Property Usage |
| Type | Residential > Multi-Unit > Duplex |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-1063-25
Assessment roll updated July 1, 2025 · Last verified February 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 |
|---|---|
| Co-owner | 2 Verified Secondary Owners |
| Mailing Address | 4430 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Date | Document |
|---|---|
| Jan 05, 2026 | Grant Deed, Transfer |
| Jul 16, 2020 | Deed of Trust, Mortgage · Conventional Mortgage BETTER MORTGAGE CORPORATION |
| Jun 05, 2017 | Deed of Trust, Mortgage · Conventional Mortgage BLUSTREAM LNDG |
| Deed Names | 3 Verified Names on Deed |
|---|---|
| Last Sale | Jan 05, 2026 |
| Deed Sale | Jan 05, 2026 |
| Prior Sale | Jun 21, 2006 · Amount on Record |
| Deed Doc Number | 2026000890 |
| Record Refreshed | Jun 08, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Jan 05, 2026 |
| Property Address | 4430 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000000890 |
| Map Reference | MB 30 PG 50 |
| Instrument Date | Jan 02, 2026 |
| Instrument | 2026000890 |
| Transaction Type | Transfer |
| Record Updated | Feb 12, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Zero or No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 4430 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4430 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Name | Verified Name |
|---|---|
| Address | 4430 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000167138 |
|---|---|
| Date | Jul 16, 2020 |
| Instrument | 2020167138 |
| Name | BETTER MORTGAGE CORPORATION |
|---|---|
| Type | Mortgage Company |
| Address | NEW YORK, NY 10271 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Aug 01, 2050 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4430 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000126546 |
| Instrument Date | Jun 05, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Jun 30, 2017 |
| Title Company | OLD REPUBLIC TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 4430 GEM AVE CASTRO VALLEY CA 945464741, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000126546 |
|---|---|
| Date | Jun 09, 2017 |
| Instrument | 126546 |
| Name | BLUSTREAM LNDG |
|---|---|
| Address | EMERYVILLE, CA 94608 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Jun 08, 2047 |
Source: Alameda County records · Assessment roll updated July 1, 2025 · Last verified February 2026
| 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 | $13,444.00 (+4.03%) Homeowner's exemption | $1,059,941 (+4.04%) Land $233,664 Building $826,277 |
| 2023 | $12,923.00 Homeowner's exemption | $1,018,791 Land $224,593 Building $794,198 |
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