Isaac Silberstein
Owner
31 Spencer St #201 Brooklyn, NY 11205
Isaac Silberstein NYC portfolio
$24.4 million -elevator 34%, walkup 16%, mixed-use 8%; Brooklyn 58%, Bronx 34%, Queens 6%*
3344th largest portfolio by dollar value
38,058 sqft – elevator 64%, walkup 22%, mixed-use 12%; Bronx 64%, Brooklyn 22%, Queens 12%
4072th largest by SF
5 properties – Brooklyn 60%, Bronx 20%, Queens 20%
2141th largest
44 residential units – Bronx 65%, Brooklyn 20%, Queens 13%
2885th largest by residential units
Person Activity past 24 months:
Buyer signatory: 2 for $4.5 million
Borrower signatory: 2 for $13.8 million
Developer (new building or major alteration): 23 for 73,534 square feet
Top Ten Associated Companies:
Conventus (2), Bluejay Management (1), Mendel Gold (1), Aron Gumbu (1)
Top Ten Associated People:
Marc Jacobowitz (1), Mendel Gold (1), Aron Gumbu (1)
Recent activity as signatory:
• Isaac Silberstein and Benjamin Silberstein borrowed $7.5 million from Conventus for 258 Empire Boulevard, Crown Heights, Brooklyn on July 15, 2026.
• Bluejay Management sold 258 Empire Boulevard, Crown Heights, Brooklyn for $2.5 million to Isaac Silberstein on April 28, 2026.
• Joel Weiss and Isaac Silberstein borrowed $6.4 million from Conventus for None on March 31, 2026.
• Mendel Gold sold 169 Troutman Street for $2 million to Isaac Silberstein on February 26, 2026.
• Isaac Silberstein filed plans for new building for 17,539 sqft in Prospect Lefferts Gardens, Brooklyn, on December 08, 2025.
• Isaac Silberstein filed plans for major alteration for 6,076 sqft in Williamsburg, Brooklyn, on July 29, 2025.
• Isaac Silberstein filed plans for new building for 36,568 sqft in Belmont/Little Italy, Bronx, on February 19, 2025.
• Aron Gumbu sold 659 Flushing Avenue for $2 million to Isaac Silberstein on April 19, 2021.
Latest Stories:
• Joel Weiss, Isaac Silberstein pay $8.5M for 29-unit rental in Highbridge (May 04, 2026)
• Isaac Silberstein pays $2M through bankruptcy for 6-unit walkup in Bushwick (March 25, 2026)