Investor profile - FL
Brandon Mardenfeld
Brandon Mardenfeld is a real estate investor and operator based in Jacksonville, FL. Public filings show activity across 48 properties held through 16 holding companies. Recent mortgage relationships include STEPHEN KUEHN IRA, Equity Trust Company, and FLORIDA SFR ASSET POOL 2021.
Brandon's Activity
As of December 2025, public records show approximately $3.5M in recorded mortgage exposure linked to this investor across at least 74 mortgage filings and 48 properties held through 16 holding companies. Activity appears concentrated in residential and industrial assets recorded between 2012 and 2025.
Associated People
Primary Geography
Jacksonville, FL
ZIP codes: 32211, 32205, 32210, 32244, and 32216
Most recorded activity for this investor appears in JACKSONVILLE, ORANGE PARK, ATLANTIC BEACH, and SAINT JOHNS.
Property Type Breakdown
Associated Entities (16)
FL · 15 properties · 49 mortgages
FL · 6 properties · 36 mortgages
FL · 6 properties · 11 mortgages
+13 more not shown
Mortgages (74)
Top Lenders
$778k · 6 loans
$490k · 3 loans
$294k · 4 loans
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 10/28/2025 | $151k | Open | 3 Shacks Capital Partners | ROSENBLUM REALTY LLC | 1320 KING ARTHUR RD, JACKSONVILLE, FL 32211 |
| 07/25/2023 | $247k | Closed | STEPHEN KUEHN IRA | ROSENBLUM REALTY LLC | 4066 FERRARRA ST, JACKSONVILLE, FL 32217 |
| 06/13/2023 | $200k | Closed | STEPHEN KUEHN IRA | BRANDON MARDENFELD PA INC | 2869 SAND CASTLE LN, JACKSONVILLE, FL 32233 |
+71 more not shown
Owned Properties (48)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 3967 LANE AVE S, JACKSONVILLE, FL 32210 | BRANDON MARDENFELD PA INC | Sold | $131k |
| 4066 FERRARRA ST, JACKSONVILLE, FL 32217 | BRANDON PA | Owns - 2.4 yrs | $235k |
| 280 CENTURY ST, JACKSONVILLE, FL 32211 | ROCKFORD HOLDINGS LLC | Sold | $11k |
+45 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential and industrial properties across Jacksonville, FL.
What companies is Brandon Mardenfeld associated with?
Brandon Mardenfeld is associated with 16 entities based on extracted signatures from public records. Key entities include MAC HOME DEVELOPMENT INC, SESSA PROPERTIES LLC, ROSENBLUM REALTY LLC, SUNSHINE VENTURE GROUP LLC, and ROCKFORD HOLDINGS LLC.
How many properties are associated with this investor?
At least 48 properties are associated with Brandon Mardenfeld and the entities they control, based on signatures extracted from recorded documents connecting Brandon Mardenfeld to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references STEPHEN KUEHN IRA, Equity Trust Company, and FLORIDA SFR ASSET POOL 2021, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2012 through 2025, with the most recent mortgage recorded in 2025.
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.
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