Investor profile - NY
Isaac Mandelbaum
Isaac Mandelbaum is a real estate investor and operator based in New York City, NY-NJ-CT. Public filings show activity across 7 properties held through 9 holding companies. Recent mortgage relationships include ConnectOne Bank, DAVID ENGLANDER, and Hanover Bank.
Isaac's Activity
As of December 2025, public records show approximately $18.9M in recorded mortgage exposure linked to this investor across at least 18 mortgage filings and 7 properties held through 9 holding companies. Activity appears concentrated in multifamily assets recorded between 2013 and 2024.
Primary Geography
New York City, NY-NJ-CT
ZIP codes: 11212, 10457, 11207, and 11210
Most recorded activity for this investor appears in BROOKLYN and BRONX.
Property Type Breakdown
Associated Entities (9)
NY · 2 properties · 6 mortgages
NY · 1 property · 5 mortgages
NY · 1 property · 3 mortgages
+6 more not shown
Mortgages (18)
Top Lenders
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 05/24/2022 | $775k | Open | PIERMONT BANK | LOTT AVE REALTY LLC | 75 LOTT AVE, BROOKLYN, NY 11212 |
| 06/23/2021 | $558k | Open | Cross River Bank | LOTT AVE REALTY LLC | 75 LOTT AVE, BROOKLYN, NY 11212 |
| 06/23/2021 | $700k | Open | DAVID ENGLANDER | LOTT AVE REALTY LLC | 75 LOTT AVE, BROOKLYN, NY 11212 |
+15 more not shown
Owned Properties (7)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 79 LOTT AVE, BROOKLYN, NY 11212 | 79 EQUITIES LLC | Sold | $0 |
| 735 E 182ND ST, BRONX, NY 10457 | 735 EQUITIES LLC | Sold | $0 |
| 79 LOTT AVE, BROOKLYN, NY 11212 | 79 EQUITIES LLC | Sold | $625k |
+4 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in multifamily properties across New York City, NY-NJ-CT.
What companies is Isaac Mandelbaum associated with?
Isaac Mandelbaum is associated with 9 entities based on extracted signatures from public records. Key entities include LOTT AVE REALTY LLC, COVERT ST REALTY LLC, 2019 EQUITIES LLC, 79 EQUITIES LLC, and 1915 EQUITITES LLC.
How many properties are associated with this investor?
At least 7 properties are associated with Isaac Mandelbaum and the entities they control, based on signatures extracted from recorded documents connecting Isaac Mandelbaum to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references ConnectOne Bank, DAVID ENGLANDER, and Hanover Bank, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2013 through 2024, with the most recent mortgage recorded in 2022.
How is associated activity determined?
Elementix uses AI to extract signatures from recorded documents. These signatures are used to determine the relationships between people and entities. This is a novel approach that goes beyond looking at corporate filings and skip-tracing.
The information displayed on this page is compiled from recorded real estate documents, business filings, and other lawfully available sources. Elementix summarizes and analyzes public record activity related to investment real estate and associated business entities. Any contact indicators shown (such as email domain references or partial phone digits) are provided solely as unverified signals and may be incomplete or outdated.
Elementix is not a consumer reporting agency, and this information does not constitute a consumer report. The data may not be used to make decisions about an individual's eligibility for personal credit, consumer housing, employment, insurance, or any other purpose governed by the Fair Credit Reporting Act.
Elementix may suppress certain contact indicators where legally required or where appropriate for safety or privacy reasons. Requests for removal, suppression, or correction of information must be submitted to compliance@elementix.ai. Elementix reviews such requests only where required by applicable law or where information is factually inaccurate. General objections or unsupported demands do not create a removal obligation.