Sean O’Sullivan
Owner
305 Hillside Avenue Williston Park, NY 11596
Sean O’Sullivan NYC portfolio
$1.3 million -walkup 100%; Manhattan 100%*
7639th largest portfolio by dollar value
9,236 sqft – walkup 100%; Manhattan 100%
6262th largest by SF
10 residential units – Manhattan 100%
4893th largest by residential units
Person Activity past 24 months:
Buyer signatory: 1 for $1.3 million
Top Ten Associated Companies:
Victor Murillo (1)
Top Ten Associated People:
Victor Murillo (1)
Recent activity as signatory:
• Victor Murillo sold 139 West 113 Street for $1.3 million to Sean O’Sullivan on June 16, 2025.
Properties:
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