NY Property Records
23 Osborne Ave
23 Osborne Ave
Brookhaven · Suffolk County · 117790000
$583,333Full market value210 · Residential
Owner of record
OwnerMortenson Ingrid & Mortenson Raymond L
Mailing address23 OSBORNE AVE · RONKONKOMA, NY, 117790000
Assessment · 2025 roll
Land assessed$250
Total assessed$2,800
Full market value$583,333
Est. annual tax$9,093 (2024, excl. special districts)
Lot
Size0.38 acres
Lot sq ft16,553
Services & districts
School districtSachem (472205)
Recorded sales · 1
Deedno price statedOct 1, 2025
seller RAYMOND L MORTENSON
buyer INGRID A MORTENSON IRREV
Liber 13326, page 650
From NYS RP-5217 transfer reports. For the deed itself, use the liber and page at the county clerk.
Deed & identifiers
Deed book / page12705 / 697
SBL02007260001000030000
Print key726.00-01-003.000
SWIS472289
Parcel ID47228902007260001000030000
Who owns 23 Osborne Ave?
23 Osborne Ave, Brookhaven is owned by Mortenson Ingrid & Mortenson Raymond L per the 2025 NYS assessment roll.
Nearby on Osborne 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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