Alameda County and Santa Clara County property records for 8 addresses on Union Sq, Union City, CA · Last verified August 2026
| Properties | 8 |
|---|---|
| Median Sale Price | $1,250,000 |
| Deeds and Mortgages on File | 10 |
| Median Price per Sqft | $26 |
| Median Annual Tax Bill | $638,908 |
| Median Year Built | 2003 |
| Median Ownership Tenure | 17 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
189,244 sqft · built 1990 · 16.5 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Nov 2025 | $681,0132025 | —Jan 2001 | Owner on Record | Assessor + 3 DocumentsUpdated Dec 2025 |
3 ba · 19,059 sqft · built 2003 · 0.372 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $510,000Sep 2000 | $86,3692024 | Amount on Record Sep 1995 | Owner on Record | Assessor + 3 DocumentsUpdated Apr 2026 |
8,156 sqft · built 1979 · 0.88 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,250,000Oct 2002 | $23,5772024 | Owner on Record | Assessor + 2 DocumentsUpdated Apr 2026 |
20 bd · 20 ba · 315,077 sqft · built 2009 · 3.35 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,580,000Apr 1996 | $987,2022025 | Owner on Record | AssessorUpdated Aug 2026 |
20 bd · 20 ba · 203,857 sqft · built 2009 · 2.61 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Dec 2009 | $638,9082025 | Owner on Record | AssessorUpdated Aug 2026 |
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $862,000Jul 2018 | 2 Owners on Record | AssessorUpdated Jun 2023 |
2 bd · 2 ba · 4,057 sqft · built 2016 · 0.887 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $50,0902025 | Owner on Record | AssessorUpdated Aug 2026 |
20 bd · 20 ba · 203,984 sqft · built 1990 · 6.46 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Mar 2014 | $1,283,4162025 | Owner on Record | Assessor + 2 DocumentsUpdated Aug 2026 |