NY Property Records
23 William St
23 William St
Islip · Suffolk County
210 · ResidentialSold $557,500 · Aug 2025
Owner of record
OwnerEstate Of Romeo D Onia
Mailing address23 WILLIAM ST · CENTRAL ISLIP, NY, 11722
Assessment · 2025 roll
Land assessed$7,000
Total assessed$24,800
Est. annual tax$8,212 (2024, excl. special districts)
Lot
Size0.25 acres
Services & districts
School districtCentral Islip (472813)
Recorded sales · 3
Deed$557,500Aug 22, 2025
seller DELFINO LINDA ONIA
buyer JOSUE, D. ROMERO-ARGUETA
Liber 13312, page 536
Deedno price statedMay 2, 2025
seller DELFINO ESTATE OF LEONCIA SENSAL
buyer LEONCIA S. DELFINO
Liber 13294, page 499
Deedno price statedMay 2, 2025
seller LEONCIA S. DELFINO
buyer LINDA DELFINO ONIA
Liber 13294, page 500
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page13294 / 499
SBL05000990002000240000
Print key99.-2-24
SWIS472889
Parcel ID47288905000990002000240000
Who owns 23 William St?
23 William St, Islip is owned by Estate Of Romeo D Onia per the 2025 NYS assessment roll. It last sold for $557,500 in Aug 2025.
Nearby on William St
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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