NY Property Records
817 Southside Ave
817 Southside Ave
Islip · Suffolk County
210 · ResidentialSold $417,000 · Oct 2020
Owner of record
OwnerMaria Castello &
Mailing address817 SOUTHSIDE AVE · WEST ISLIP, NY, 11795
Assessment · 2025 roll
Land assessed$8,800
Total assessed$36,000
Est. annual tax$9,304 (2024, excl. special districts)
Lot
Size0.34 acres
Services & districts
School districtWest Islip (472809)
Recorded sales · 1
Deed$417,000Oct 30, 2020
seller TAL NEEDS TRUST ROBERT MAIFORTH SUPPLE
buyer MARIA CASTELLO
Liber 13079, page 255
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page13079 / 255
SBL05003630001000100000
Print key363.-1-10
SWIS472889
Parcel ID47288905003630001000100000
Who owns 817 Southside Ave?
817 Southside Ave, Islip is owned by Maria Castello & per the 2025 NYS assessment roll. It last sold for $417,000 in Oct 2020.
Nearby on Southside 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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