Alameda County property record for 4424 Gem Ave, Castro Valley, CA 94546 · Last verified October 2025
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 1 Baths |
| Year Built | Built 1957 |
| Square Footage | 1,431 sqft Living Area |
| Lot Size | 5,484 sqft (0.125 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $602,500 (2016) |
| Tax Bill | $9,285.00 (2025) |
| Primary APN | 84C-1063-24 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Baths |
| Total Rooms | 6 Rooms |
| Building Area | 1,431 sqft Living Area |
| Stories | 1 Stories |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1957 |
| Architectural Style | Other Style |
| Construction Type | Wood Construction |
| Lot Area | 5,484 sqft (0.125 acres) |
| Street Address | 4424 GEM AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4741 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | TRACT 979 BLK 2 LOT 2 |
| Jurisdiction | ALAMEDA CA |
| Minor Civil Division | HAYWARD |
| Census Blockgroup | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records · APN 84C-1063-24
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 | Individual Name on File |
|---|---|
| Co-owner | Verified Secondary Owner |
| Mailing Address | 4424 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Date | Document |
|---|---|
| Apr 14, 2021 | Deed of Trust, Mortgage · Conventional Mortgage WINTRUST MORTGAGE |
| Mar 23, 2020 | Deed of Trust, Mortgage · Conventional Mortgage WINTRUST MORTGAGE |
| Sep 28, 2018 | Deed of Trust, Mortgage · Conventional Mortgage AMRES CORP |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jan 29, 2016 · Amount on Record |
| Deed Sale | Jan 29, 2016 · Amount on Record |
| Prior Sale | Dec 19, 2006 · Amount on Record |
| Deed Doc Number | 2016021688 |
| Record Refreshed | Jun 07, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4424 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Transaction Type | Mortgage |
| Record Updated | May 07, 2021 |
| Title Company | BOSTON NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 4424 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000148321 |
|---|---|
| Date | Apr 14, 2021 |
| Instrument | 2021148321 |
| Name | WINTRUST MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | DES PLAINES, IL 60018 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 01, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4424 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Title Company | BOSTON NATIONAL TTL AGCY LLC |
| Name | Verified Name |
|---|
| Document Number | 0000067012 |
|---|---|
| Date | Mar 23, 2020 |
| Instrument | 2020067012 |
| Name | WINTRUST MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | DES PLAINES, IL 60018 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 01, 2050 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4424 GEM AVE, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000192196 |
| Instrument Date | Sep 28, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Oct 23, 2018 |
| Title Company | ENTITLE INSURANCE COMPANY |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 4424 GEM AVE CASTRO VALLEY CA 945464741, CASTRO VALLEY, CA 94546-4741 |
| Document Number | 0000192196 |
|---|---|
| Date | Oct 03, 2018 |
| Instrument | 192196 |
| Name | AMRES CORP |
|---|---|
| Address | FEASTERVILLE TREVOSE, PA 19053 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Oct 02, 2048 |
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 | $9,285.00 (+3.94%) | $713,220 (+4.04%) Land $213,966 Building $499,254 |
| 2023 | $8,933.00 | $685,530 Land $205,659 Building $479,871 |
4424 Gem Ave 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 500 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.
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