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Wilbeam Ave, Castro Valley, CA Property Records

Alameda County property records for 30 addresses on Wilbeam Ave, Castro Valley, CA · Last verified August 2026

Wilbeam Ave Highlights

Properties 47
Median Sale Price $625,000
Deeds and Mortgages on File 46
Median Price per Sqft $475
Owner Occupied 13%
Median Annual Tax Bill $7,873
Median Year Built 1987
Median Ownership Tenure 18 years

Properties on Wilbeam Ave

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

20853 Wilbeam Ave

2 bd · 2 ba · 1,654 sqft · built 1938 · 0.165 acres

Last Sale Tax Bill Prior Sale Owner Records
$405,000Jan 2019 $3,5612025 —Jan 2019 1 Name on Record Assessor + 6 DocumentsUpdated Aug 2026

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20860 Wilbeam Ave

0.322 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,3272025 2 Names on Record AssessorUpdated Aug 2026

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20861 Wilbeam Ave

7,422 sqft · built 1966 · 0.286 acres

Last Sale Tax Bill Prior Sale Owner Records
$460,000Jan 1993 $24,1052025 —Mar 1998 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20864 Wilbeam Ave

6 ba · 4,050 sqft · built 1963 · 0.18 acres

Last Sale Tax Bill Prior Sale Owner Records
$580,000Aug 1999 $14,9412025 —Apr 2008 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20868 Wilbeam Ave

8 bd · 4 ba · 3,250 sqft · built 1977 · 0.216 acres

Last Sale Tax Bill Prior Sale Owner Records
$10,9772025 —Mar 1999 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20872 Wilbeam Ave

3 bd · 1 ba · 1,359 sqft · built 1945 · 0.183 acres

Last Sale Tax Bill Prior Sale Owner Records
—Aug 2025 $4,9072025 —May 2025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20876 Wilbeam Ave

2 bd · 1 ba · 656 sqft · built 1940 · 0.183 acres

Last Sale Tax Bill Prior Sale Owner Records
$550,000Feb 2017 $8,4012025 —Aug 2017 1 Name on Record Assessor + 4 DocumentsUpdated Oct 2025

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20879 Wilbeam Ave

20 bd · 20 ba · 21,190 sqft · built 1959 · 0.914 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,500,000Aug 2005 $71,1332025 —Aug 2005 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20880 Wilbeam Ave

5 bd · 3 ba · 2,132 sqft · built 1967 · 0.13 acres

Last Sale Tax Bill Prior Sale Owner Records
$134,500May 2005 $5,8292025 Amount on Record Jun 1996 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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20881 Wilbeam Ave

20 bd · 20 ba · 19,785 sqft · built 1960 · 0.83 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,500,000Aug 2005 $65,7312025 —Aug 2005 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20902 Wilbeam Ave

3 bd · 2 ba · 1,717 sqft · built 1954 · 0.197 acres

Last Sale Tax Bill Prior Sale Owner Records
$895,000May 2016 $13,6382025 Amount on Record May 2007 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Oct 2025

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20928 Wilbeam Ave

20 bd · 20 ba · 38,588 sqft · built 1963 · 1.51 acres

Last Sale Tax Bill Prior Sale Owner Records
$14,000,000Feb 2020 $217,1572025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20933 Wilbeam Ave

4 bd · 3 ba · 2,082 sqft · built 1925 · 0.111 acres

Last Sale Tax Bill Prior Sale Owner Records
$510,000May 2015 $8,3812025 —Mar 2014 2 Names on Record AssessorUpdated Aug 2026

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20939 Wilbeam Ave

20 bd · 20 ba · 19,382 sqft · built 1964 · 0.874 acres

Last Sale Tax Bill Prior Sale Owner Records
$63,3952025 —Feb 2025 2 Names on Record Assessor + 2 DocumentsUpdated Aug 2026

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20942 Wilbeam Ave

4 bd · 2 ba · 1,792 sqft · built 1948 · 0.164 acres

Last Sale Tax Bill Prior Sale Owner Records
$11,1822025 —Dec 2014 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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20991 Wilbeam Ave

3 bd · 2 ba · 1,314 sqft · built 1956 · 0.137 acres

Last Sale Tax Bill Prior Sale Owner Records
$625,000Jun 2017 $9,4282025 —Jun 2003 1 Name on Record Assessor + 1 DocumentUpdated Oct 2025

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21003 Wilbeam Ave

3 bd · 2 ba · 1,314 sqft · built 1956 · 0.144 acres

Last Sale Tax Bill Prior Sale Owner Records
$600,000Dec 2016 $9,0032025 3 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Oct 2025

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21015 Wilbeam Ave

4 bd · 4 ba · 2,118 sqft · built 1957 · 0.182 acres

Last Sale Tax Bill Prior Sale Owner Records
$405,000May 2012 $7,7202025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Oct 2025

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21029 Wilbeam Ave

8 bd · 8 ba · 4,236 sqft · built 1987 · 0.182 acres

Last Sale Tax Bill Prior Sale Owner Records
$9,7462025 —Oct 2009 1 Name on Record AssessorUpdated Aug 2026

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21035 Wilbeam Ave

10 bd · 10 ba · 5,040 sqft · built 1987 · 0.094 acres

Last Sale Tax Bill Prior Sale Owner Records
$259,500Jan 1996 $11,6682025 —Aug 2000 1 Name on Record AssessorUpdated Aug 2026

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21041 Wilbeam Ave

4 bd · 5 ba · 3,010 sqft · built 1928 · 0.169 acres

Last Sale Tax Bill Prior Sale Owner Records
$460,000Mar 2012 $9,1112025 1 Name on Record AssessorUpdated Oct 2025

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21048 Wilbeam Ave

2.62 acres

Last Sale Tax Bill Prior Sale Owner Records
—Aug 1992 1 Name on Record AssessorUpdated Aug 2026

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21059 Wilbeam Ave

38 bd · 38 ba · 19,665 sqft · built 2008 · 0.492 acres

Last Sale Tax Bill Prior Sale Owner Records
—Sep 2005 Amount on Record Jan 2003 1 Name on Record AssessorUpdated Oct 2023

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21059 Wilbeam Ave

18 units · Built 2008 · 522 sq ft

Last Sale Median Tax Bill Median Sale    
$120,000Nov 2008 $7,5632025 $434,00018 units    

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21079 Wilbeam Ave

19 bd · 14 ba · 9,960 sqft · built 1978 · 0.562 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,200,000Mar 2000 $29,6152025 —Mar 2000 1 Name on Record AssessorUpdated Aug 2026

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21091 Wilbeam Ave

20 bd · 20 ba · 11,752 sqft · built 2021 · 0.472 acres

Last Sale Tax Bill Prior Sale Owner Records
$59,5772025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

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21109 Wilbeam Ave

4 bd · 5 ba · 3,370 sqft · built 1946 · 0.532 acres

Last Sale Tax Bill Prior Sale Owner Records
$230,000Feb 2011 $8,8032025 —Aug 2009 1 Name on Record AssessorUpdated Aug 2026

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21143 Wilbeam Ave

4 bd · 2 ba · 1,839 sqft · built 1925 · 0.218 acres

Last Sale Tax Bill Prior Sale Owner Records
$965,000May 2018 $14,2252024 Amount on Record Aug 2005 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

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21181 Wilbeam Ave

2 bd · 2 ba · 928 sqft · built 1926 · 0.169 acres

Last Sale Tax Bill Prior Sale Owner Records
—Jul 1990 $4,1582025 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

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21206 Wilbeam Ave

Last Sale Tax Bill Prior Sale Owner Records
2 Names on Record Owner Occupied AssessorUpdated May 2024

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Wildfire Risk on Wilbeam Ave

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

Property Records in Nearby Streets