NY Property Records
15 Costello Ave
15 Costello Ave
Islip · Suffolk County
220 · Residential
Owner of record
OwnerHenry & Julia Dolny
Mailing address9 LINCOLN CT · COPIAGUE, NY, 11726
Assessment · 2025 roll
Land assessed$7,800
Total assessed$41,700
Est. annual tax$12,537 (2024, excl. special districts)
Lot
Size0.25 acres
Services & districts
School districtBay Shore (472801)
Recorded sales · 1
Deedno price statedJun 8, 2017
seller JULIA DOLNY
buyer HENRY DOLNY
Liber 12935, page 746
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page12935 / 746
SBL05002910001000510000
Print key291.-1-51
SWIS472889
Parcel ID47288905002910001000510000
Who owns 15 Costello Ave?
15 Costello Ave, Islip is owned by Henry & Julia Dolny per the 2025 NYS assessment roll.
Nearby on Costello 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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