NY Property Records
19 William Ave
19 William Ave
Islip · Suffolk County
210 · ResidentialSold $710,000 · Dec 2025
Owner of record
OwnerMichael Obrien &
Mailing address19 WILLIAM AVE · EAST ISLIP, NY, 11730
Assessment · 2025 roll
Land assessed$9,900
Total assessed$33,500
Est. annual tax$8,714 (2024, excl. special districts)
Lot
Size0.25 acres
Services & districts
School districtEast Islip (472803)
Recorded sales · 2
Deed$710,000Dec 15, 2025
seller MICHAEL OBRIEN
buyer CONNOR DONNELLY
Liber 13326, page 456
Deed$575,000Apr 6, 2022
seller JAMES G. LENOX
buyer MICHAEL OBRIEN
Liber 13156, page 231
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page13156 / 231
SBL05003720004000210000
Print key372.-4-21
SWIS472889
Parcel ID47288905003720004000210000
Who owns 19 William Ave?
19 William Ave, Islip is owned by Michael Obrien & per the 2025 NYS assessment roll. It last sold for $710,000 in Dec 2025.
Nearby on William 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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