NY Property Records
100 Duncan Ave
100 Duncan Ave
Cornwall-on-Hudson · Orange County
$455,100Full market value210 · Residential
Owner of record
OwnerCostello Dennis &
AlsoCostello, Patricia
Mailing address100 Duncan Ave · Cornwall-On-Hudson, NY, 12520
Assessment · 2025 roll
Land assessed$98,500
Total assessed$287,700
Full market value$455,100
Est. annual tax$10,064 (2024, excl. special districts)
Building
StyleSplit level
Year built1959
Living area1,992 sq ft
Bedrooms3
Full baths2
HeatHot wtr/stm
FuelGas
Lot
Size0.36 acres (GIS)
Frontage × depth140 × 120 ft
Services & districts
WaterComm/public
SewerComm/public
UtilitiesGas & elec
School districtCornwall (332401)
Deed & identifiers
SBL11000000040080000000
Print key110-4-8
SWIS332401
Parcel ID33240111000000040080000000
Who owns 100 Duncan Ave?
100 Duncan Ave, Cornwall-on-Hudson is owned by Costello Dennis & per the 2025 NYS assessment roll.
Nearby on Duncan 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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