Alameda County property records for 15 addresses on Helton St, Castro Valley, CA · Last verified October 2026
| Properties | 15 |
|---|---|
| Median Sale Price | $1,012,000 |
| Deeds and Mortgages on File | 18 |
| Median Price per Sqft | $452 |
| Owner Occupied | 93% |
| Median Annual Tax Bill | $9,772 |
| Median Year Built | 1976 |
| Median Ownership Tenure | 16 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
4 bd · 2.5 ba · 2,134 sqft · built 1976 · 0.156 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,400,000Aug 2026 | $3,0392025 | —Nov 2013 | 2 Owners on Record Owner Occupied | AssessorUpdated Oct 2026 |
4 bd · 2.5 ba · 2,134 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $590,000Mar 2010 | $9,7722025 | Amount on Record Jun 2006 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Sep 2026 |
4 bd · 2.5 ba · 2,106 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 2003 | $2,9412025 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
5 bd · 3 ba · 2,450 sqft · built 1975 · 0.264 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,100,000Apr 2017 | $15,8502025 | Amount on Record Nov 2011 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
3 bd · 2 ba · 1,801 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4,4852025 | —Oct 1995 | Owner on Record Owner Occupied | AssessorUpdated Sep 2026 |
5 bd · 2.5 ba · 2,234 sqft · built 1975 · 0.271 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,012,000Jan 2020 | $13,8462025 | 2 Owners on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2026 |
4 bd · 2.5 ba · 2,134 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,230,000Oct 2022 | $15,1122025 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
4 bd · 2.5 ba · 2,592 sqft · built 1975 · 0.314 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $315,000Nov 1993 | $7,9602025 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 2 ba · 1,801 sqft · built 1975 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,000,000Jan 2021 | $13,6422025 | —May 2016 | 2 Owners on Record Owner Occupied | Assessor + 6 DocumentsUpdated Oct 2026 |
4 bd · 2.5 ba · 2,106 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5,8512025 | 2 Owners on Record | AssessorUpdated Aug 2026 |
3 bd · 2 ba · 1,801 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $678,000Nov 2004 | $11,9372025 | Amount on Record Jan 2000 | Owner on Record Owner Occupied | AssessorUpdated Sep 2026 |
4 bd · 2.5 ba · 1,957 sqft · built 1975 · 0.148 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $843,000Oct 2005 | $14,3792025 | —May 2013 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
4 bd · 2.5 ba · 2,121 sqft · built 1975 · 0.185 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $252,500Jun 1988 | $3,4352025 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
4 bd · 2.5 ba · 2,106 sqft · built 1976 · 0.149 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4,9422025 | —Aug 2012 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
4 bd · 2.5 ba · 2,121 sqft · built 1976 · 0.156 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,450,000Aug 2024 | $17,9792025 | Amount on Record Aug 2017 | 2 Owners on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |