NY Property Records
23 William St
23 William St
Islip · Suffolk County
210 · ResidentialSold $312,000 · Aug 2017
Owner of record
OwnerOlga E Sanchez-Alvarenga &
Mailing address23 WILLIAM ST · BAY SHORE, NY, 11706
Assessment · 2025 roll
Land assessed$6,700
Total assessed$28,100
Est. annual tax$8,448 (2024, excl. special districts)
Lot
Size0.18 acres
Services & districts
School districtBay Shore (472801)
Recorded sales · 2
Deed$312,000Aug 29, 2017
seller PROGRESSIVE HOUSING CORP.
buyer OLGA SANCHEZ-ALVARENGA
Liber 12930, page 187
Deed$165,000Feb 3, 2017
seller ESTATE OF GUDAITIS
buyer PROGRESSIVE HOUSING CORP.
Liber 12904, page 288
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page12930 / 187
SBL05002900001000580000
Print key290.-1-58
SWIS472889
Parcel ID47288905002900001000580000
Who owns 23 William St?
23 William St, Islip is owned by Olga E Sanchez-Alvarenga & per the 2025 NYS assessment roll. It last sold for $312,000 in Aug 2017.
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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