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Duffin Ave, West Islip, NY Property Records

Suffolk County and Islip Town property records for 33 addresses on Duffin Ave, West Islip, NY · Last verified August 2026

Duffin Ave Highlights

Properties 33
Median Sale Price $680,000
Deeds and Mortgages on File 43
Median Price per Sqft $359
Owner Occupied 91%
Median Annual Tax Bill $11,896
Median Year Built 1955
Median Ownership Tenure 11 years

Properties on Duffin Ave

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

1 Duffin Ave

0.26 acres

Last Sale Tax Bill Prior Sale Owner Records
$343,000May 2015 $11,8382024 Amount on Record Mar 2010 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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2 Duffin Ave

0.369 acres

Last Sale Tax Bill Prior Sale Owner Records
$715,000Jul 2024 $12,4032024 Amount on Record Mar 2023 Owner on Record Assessor + 2 DocumentsUpdated Aug 2026

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3 Duffin Ave

2,417 sqft · built 1955 · 0.35 acres

Last Sale Tax Bill Prior Sale Owner Records
Owner on Record Owner Occupied AssessorUpdated May 2026

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4 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
Owner on Record Owner Occupied AssessorUpdated May 2026

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5 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$165,000Nov 1994 2 Owners on Record Owner Occupied AssessorUpdated Jul 2026

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6 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
Owner on Record Owner Occupied AssessorUpdated Jul 2026

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7 Duffin Ave

1,495 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated May 2026

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8 Duffin Ave

1,677 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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9 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$750,000Mar 2026 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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10 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$475,000Jan 2017 Amount on Record Aug 2006 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated May 2026

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11 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$187,500Oct 2014 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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12 Duffin Ave

1,537 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$680,000Jan 2023 Amount on Record Sep 2017 Owner on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

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13 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
Owner on Record Owner Occupied AssessorUpdated Jul 2026

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14 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$380,000Jul 2012 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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15 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
2 Owners on Record Owner Occupied AssessorUpdated Aug 2026

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16 Duffin Ave

1,437 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
2 Owners on Record Owner Occupied AssessorUpdated Aug 2026

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17 Duffin Ave

1,917 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$13,0222024 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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18 Duffin Ave

1,437 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$384,000Mar 2018 $11,5602024 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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19 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$500,000Sep 2007 Owner on Record Owner Occupied AssessorUpdated May 2026

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20 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$615,000Jul 2023 $11,2532024 Amount on Record Dec 2015 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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21 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$645,000Dec 2023 $12,0082024 Amount on Record Mar 1997 Owner on Record Owner Occupied Assessor + 4 DocumentsUpdated Aug 2026

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22 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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23 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$535,000Nov 2005 $11,7552024 Amount on Record Jun 1995 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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24 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
Owner on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

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25 Duffin Ave

1,437 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$438,500Jul 2006 $10,8552024 Amount on Record Nov 2003 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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26 Duffin Ave

2,155 sqft · built 1955 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$775,000Aug 2024 $12,9942024 Amount on Record Oct 2017 2 Owners on Record Assessor + 5 DocumentsUpdated Aug 2026

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27 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$14,2602024 2 Owners on Record Owner Occupied AssessorUpdated Aug 2026

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28 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$167,000Sep 1998 Owner on Record Owner Occupied AssessorUpdated Aug 2026

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29 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
—Dec 2010 Owner on Record AssessorUpdated Jul 2026

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30 Duffin Ave

0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$460,000Apr 2004 $11,8962024 Amount on Record Apr 2001 2 Owners on Record Owner Occupied AssessorUpdated Aug 2026

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31 Duffin Ave

1,797 sqft · built 1955 · 0.33 acres

Last Sale Tax Bill Prior Sale Owner Records
2 Owners on Record Owner Occupied Assessor + 4 DocumentsUpdated Aug 2026

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32 Duffin Ave

0.269 acres

Last Sale Tax Bill Prior Sale Owner Records
$315,000Nov 2016 $11,7652024 Owner on Record Owner Occupied AssessorUpdated Aug 2026

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33 Duffin Ave

0.23 acres

Last Sale Tax Bill Prior Sale Owner Records
2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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Property Records in Nearby Streets