Alameda County property records for 42 addresses on Knox St, Castro Valley, CA · Last verified August 2026
| Properties | 42 |
|---|---|
| Median Sale Price | $830,000 |
| Deeds and Mortgages on File | 72 |
| Median Price per Sqft | $678 |
| Owner Occupied | 69% |
| Median Annual Tax Bill | $7,575 |
| Median Year Built | 1947 |
| Median Ownership Tenure | 17 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
0.216 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Sep 1993 | 1 Name on Record | AssessorUpdated Aug 2026 |
4 bd · 3 ba · 2,099 sqft · built 1953 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $158,000Jul 1997 | $6,6692025 | —Nov 2006 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Oct 2025 |
2 bd · 2 ba · 1,572 sqft · built 1910 · 0.195 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $160,000Nov 1988 | $5,8172025 | —May 2016 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Oct 2025 |
2 bd · 1 ba · 897 sqft · built 1934 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,7892025 | —Feb 1996 | 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
2 bd · 2 ba · 810 sqft · built 1951 · 0.207 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Dec 1990 | $1,7692025 | 2 Names on Record | AssessorUpdated Aug 2026 |
4 bd · 3 ba · 1,863 sqft · built 1952 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $727,000Nov 2017 | $10,8152025 | Amount on Record Jun 2017 | 3 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Oct 2025 |
3 bd · 2 ba · 1,960 sqft · built 1928 · 0.344 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $255,000Sep 2009 | $8,0112025 | —Sep 2009 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
6 bd · 3.5 ba · 2,040 sqft · built 1925 · 0.913 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $7,5752025 | —Mar 2004 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 2 ba · 1,494 sqft · built 1924 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $782,000Oct 2018 | $11,3522025 | Amount on Record May 2014 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2025 |
1 bd · 1 ba · 530 sqft · built 1947 · 0.074 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $130,000Sep 1999 | $3,2762025 | —Sep 1999 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
2 bd · 1 ba · 828 sqft · built 1950 · 0.086 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $146,000Jun 1996 | $3,7842025 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
5 bd · 2.5 ba · 1,848 sqft · built 1937 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,4102025 | —Mar 2020 | 1 Name on Record | Assessor + 2 DocumentsUpdated Aug 2026 |
3 bd · 2 ba · 1,457 sqft · built 1946 · 0.14 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $335,000Apr 2008 | $6,7842024 | Amount on Record Jan 2008 | 1 Name on Record | Assessor + 1 DocumentUpdated Jul 2026 |
3 bd · 2 ba · 1,116 sqft · built 1941 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $775,000Feb 2021 | $10,9542025 | Amount on Record Feb 2018 | 2 Names on Record Owner Occupied | Assessor + 7 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 1,898 sqft · built 1930 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $83,000Oct 1999 | $5,7902025 | Amount on Record Oct 1997 | 2 Names on Record | Assessor + 2 DocumentsUpdated Aug 2026 |
2 bd · 2 ba · 1,430 sqft · built 1925 · 0.198 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $153,000Jun 1995 | $3,8682025 | —Jun 1995 | 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 2 ba · 1,520 sqft · built 1948 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $675,000Nov 2016 | $10,2112025 | —Oct 2010 | 2 Names on Record Owner Occupied | AssessorUpdated Oct 2025 |
2 bd · 2 ba · 1,447 sqft · built 1918 · 0.224 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $875,000May 2025 | $5,1382025 | Amount on Record Jun 2001 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |
3 bd · 2 ba · 2,240 sqft · built 1958 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $568,000May 2015 | $9,1242025 | —Jun 2025 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2025 |
1 bd · 1 ba · 865 sqft · built 1928 · 0.25 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $178,000May 1993 | $3,2532025 | 2 Names on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 2 ba · 1,344 sqft · built 1927 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $229,000Jul 1990 | $6,1192025 | —Aug 2003 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2025 |
2 bd · 1 ba · 941 sqft · built 1910 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $80,500Apr 1993 | $5,1302025 | —Mar 2003 | 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 1 ba · 1,272 sqft · built 1949 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $616,000Oct 2005 | $10,7222024 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
4 bd · 3 ba · 2,280 sqft · built 1975 · 0.114 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $529,500Apr 2016 | $9,4732025 | Amount on Record Feb 2016 | 4 Names on Record | AssessorUpdated Oct 2025 |
3 bd · 2 ba · 1,456 sqft · built 1925 · 0.154 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $410,000Apr 2002 | $8,0992025 | Amount on Record May 2003 | 2 Names on Record Owner Occupied | AssessorUpdated Oct 2025 |
4 bd · 3 ba · 1,751 sqft · built 1925 · 0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $31,000Aug 1997 | $7,5802025 | Amount on Record May 1997 | 1 Name on Record | Assessor + 1 DocumentUpdated Aug 2026 |
4 bd · 3 ba · 1,998 sqft · built 1974 · 0.112 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $253,636Sep 1992 | $6,3592025 | —Oct 2014 | 1 Name on Record | AssessorUpdated Aug 2026 |
2 bd · 2 ba · 1,224 sqft · built 1948 · 0.091 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $830,000Jul 2023 | $10,9632025 | —Jan 2021 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Oct 2025 |
1 bd · 1.5 ba · 982 sqft · built 1900 · 0.158 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $128,000Oct 1989 | $3,7002025 | 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 3 ba · 1,812 sqft · built 1948 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $745,000Oct 2018 | $10,8612025 | —Dec 2012 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2025 |
3 bd · 2 ba · 1,302 sqft · built 1961 · 0.134 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $830,000Sep 2020 | $13,1472025 | Amount on Record May 2018 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2025 |
2 bd · 1 ba · 945 sqft · built 1953 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $260,000Jul 2011 | $4,7832025 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2025 |
10 bd · 7 ba · 5,440 sqft · built 1965 · 0.223 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,390,000Sep 2020 | $26,6502025 | —Jul 2017 | 1 Name on Record | Assessor + 3 DocumentsUpdated Aug 2026 |
3 bd · 1 ba · 1,389 sqft · built 1953 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $825,000Mar 2019 | $11,6942024 | Amount on Record Apr 1997 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
2 bd · 1 ba · 884 sqft · built 1922 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $770,000Dec 2021 | $10,4362024 | —Oct 2020 | 2 Names on Record | Assessor + 5 DocumentsUpdated Jul 2026 |
3 bd · 2 ba · 1,075 sqft · built 1944 · 0.17 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $10,7592025 | —May 2012 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
1,875 sqft · built 1968 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,4352025 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
3 bd · 2 ba · 1,428 sqft · built 1947 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,045,000Apr 2025 | $10,6942025 | Amount on Record Jun 2017 | 2 Names on Record Owner Occupied | Assessor + 7 DocumentsUpdated Jul 2026 |
3 bd · 2 ba · 1,533 sqft · built 1969 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $259,954May 2010 | $3,8872025 | 2 Names on Record | AssessorUpdated Oct 2025 |
4 bd · 1 ba · 1,596 sqft · built 1947 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $792,500Aug 2022 | $10,7002025 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2025 |
2 bd · 1 ba · 1,190 sqft · built 1945 · 0.172 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $130,000Feb 1994 | $3,6642025 | —Jan 2002 | 2 Names on Record | Assessor + 2 DocumentsUpdated Aug 2026 |
3,008 sqft · built 1963 · 0.247 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Oct 2013 | $9,1772025 | —Nov 2005 | 1 Name on Record | Assessor + 1 DocumentUpdated Oct 2025 |
Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |