NY Property Records
21 Duffin Ave
21 Duffin Ave
Islip · Suffolk County
210 · ResidentialSold $645,000 · Oct 2023
Owner of record
OwnerLouis Kaplan
Mailing address21 DUFFIN AVE · WEST ISLIP, NY, 11795
Assessment · 2025 roll
Land assessed$9,400
Total assessed$44,100
Est. annual tax$11,893 (2024, excl. special districts)
Lot
Size0.25 acres
Services & districts
School districtWest Islip (472809)
Recorded sales · 2
Deed$645,000Oct 30, 2023
seller NANCY LAMBERSON
buyer LOUIS KAPLAN
Liber 13229, page 512
Deedno price statedMar 22, 2017
seller THOMAS LAMBERSON
buyer NANCY LAMBERSON
Liber 12911, page 583
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page13229 / 512
SBL05004140001000860000
Print key414.-1-86
SWIS472889
Parcel ID47288905004140001000860000
Who owns 21 Duffin Ave?
21 Duffin Ave, Islip is owned by Louis Kaplan per the 2025 NYS assessment roll. It last sold for $645,000 in Oct 2023.
Nearby on Duffin Ave
Public record, NYS tax roll 2025. Values are the assessor's, not an appraisal. Provided for informational purposes only — accuracy and completeness are not warranted or guaranteed; verify against official sources before relying on it. Disclaimer · Request redaction
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