609 4 Street

Owner: Madison Realty Capital

Acquired: August 12, 2025, $616,243

Debt: August 14, 2025, $0

Built: 1920

SF: 41,113

Dwelling units: 41

No. of buildings: 1

Class: Semi-fireproof (Without Stores) (D1)

Floors: 7

HPD Ownership Registration Information

Last registered: 2025-08-21 (expires 2026-09-01)

Transactions:

• ENGE Financing on August 14, 2025 bought a loan with an original principal of $17.8 million from Flagstar Bank, signed by Mitchel Baffa, secured by 78 Prospect Park West, Park Slope, Brooklyn, when owned by Madison Realty Capital.

• None sold 78 Prospect Park West, Park Slope, Brooklyn for $616,243 to None on August 12, 2025.

• Madison Realty Capital borrowed $17.8 million from New York Community Bank for 78 Prospect Park West, Park Slope, Brooklyn on December 03, 2019.

Development:

• Brett Leonhardt filed major alteration job 321289388 for 40,766 sqft R-2 building with 40 apartments in Park Slope, Brooklyn, on December 17, 2015.

• Firstservice Residential filed alteration job B01348703 for 6,411 sqft R-2 building with 40 apartments in Park Slope, Brooklyn, on March 04, 2026.

• Prabhjit Singh filed alteration job B01190866 for 2,956 sqft building with 41 apartments in Park Slope, Brooklyn, on March 06, 2025.

• Prabhjit Singh filed alteration job B01165590 for 2,956 sqft building with 41 apartments in Park Slope, Brooklyn, on January 10, 2025.

• Lucio Gil Rumaldo filed alteration job B00518923 for 2,030 sqft building with 41 apartments in Park Slope, Brooklyn, on May 10, 2021.

• Allen Konstam filed alteration job 340578119 for J-2 building with 40 apartments in Park Slope, Brooklyn, on January 18, 2018.

Violations:

According to city public data, the properties have not received any significant violations in the last year.

Latest Stories:

• Madison Realty Capital borrows $18M from New York Community Bank for multifamily property in Park Slope (December 04, 2019)