Alameda County property records for 17 addresses on Massachusetts St, Castro Valley, CA · Last verified October 2026
| Properties | 17 |
|---|---|
| Median Sale Price | $1,400,000 |
| Deeds and Mortgages on File | 37 |
| Median Price per Sqft | $539 |
| Owner Occupied | 94% |
| Median Annual Tax Bill | $11,637 |
| Median Year Built | 1977 |
| Median Ownership Tenure | 6 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
3 bd · 2 ba · 1,480 sqft · built 1961 · 0.202 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $416,000Apr 2011 | $7,0752025 | Amount on Record Aug 2010 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2026 |
3 bd · 2 ba · 1,630 sqft · built 1937 · 0.156 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $880,000Jul 2020 | $12,1092025 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Sep 2026 |
3 bd · 2.5 ba · 1,601 sqft · built 1963 · 0.156 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,9702025 | —May 2021 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |
3 bd · 1 ba · 1,060 sqft · built 1954 · 0.143 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,4812025 | —Aug 2006 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 1 ba · 1,017 sqft · built 1954 · 0.354 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,100,000Sep 2024 | $13,7672025 | —Apr 2002 | 2 Owners on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 2 ba · 1,829 sqft · built 1977 · 0.141 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,215,000Jul 2024 | $15,1232025 | Amount on Record Sep 2021 | 2 Owners on Record Owner Occupied | Assessor + 4 DocumentsUpdated Sep 2026 |
4 bd · 3.5 ba · 2,280 sqft · built 1984 · 0.195 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,105,000Jul 2018 | $15,3312025 | —Jul 2018 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Sep 2026 |
2 bd · 1 ba · 1,196 sqft · built 1932 · 0.157 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $440,000Dec 2013 | $7,1512025 | —Dec 2013 | Owner on Record Owner Occupied | Assessor + 4 DocumentsUpdated Oct 2026 |
3 bd · 1 ba · 2,190 sqft · built 1977 · 0.341 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,5132025 | —Sep 1999 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
5 bd · 2 ba · 2,693 sqft · built 1928 · 1 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6,2892025 | —Jul 2012 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 2 ba · 3,556 sqft · built 1931 · 0.933 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,400,000Feb 2020 | $14,9832025 | —Jun 2016 | Owner on Record Owner Occupied | Assessor + 4 DocumentsUpdated Oct 2026 |
3 bd · 3.5 ba · 2,820 sqft · built 1986 · 0.316 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $380,000Feb 1994 | $8,4072025 | —Mar 2017 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
4 bd · 3 ba · 2,929 sqft · built 1986 · 0.268 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,552,000Jan 2021 | $20,6092025 | Amount on Record Aug 2014 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Sep 2026 |
4 bd · 3.5 ba · 4,142 sqft · built 1991 · 0.239 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 2003 | $11,6372025 | —Aug 2002 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
4 bd · 3 ba · 3,138 sqft · built 1986 · 0.206 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,750,000May 2024 | $21,8492025 | Amount on Record Dec 1996 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
4 bd · 3 ba · 2,563 sqft · built 1986 · 0.239 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6,5592025 | —Jul 2023 | 2 Owners on Record | Assessor + 2 DocumentsUpdated Aug 2026 |
4 bd · 3 ba · 4,033 sqft · built 1991 · 0.312 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,430,000May 2018 | $20,0912025 | 2 Owners on Record Owner Occupied | Assessor + 5 DocumentsUpdated Oct 2026 |