635 3 Street
Park Slope, Brooklyn
Parcel ID (BBL): 3010790040
Owner: Greenbrook Partners
Acquired: March 26, 2021, $15 million
Debt: March 26, 2021, $12.7 million
Built: 1920
SF: 36,636
Dwelling units: 30
No. of buildings: 1
Class: Semi-Fireproof With Stores (D7)
Floors: 6
HPD Ownership Registration Information
Last registered: 2026-01-20 (expires 2026-09-01)
Glen Brown
Head Officer
625 BROADWAY 11TH F New York, NY, 10012
70 Ppw Llc
Corporate Owner
625 BROADWAY 11TH F New York, NY, 10012
Freestone Property Group Llc
Agent
625 BROADWAY 11TH F New York, NY, 10012
Anthony Nunziata
Site Manager
Transactions:
• Greenbrook Partners borrowed $12.7 million from FS Investments for 70 Prospect Park West, Park Slope, Brooklyn on March 26, 2021.
• Kupferman family sold 70 Prospect Park West, Park Slope, Brooklyn for $15 million to Greenbrook Partners on March 26, 2021.
Development:
• Scott Kupferman filed major alteration job 321042260 for 43,751 sqft R-2 building with 36 apartments in Park Slope, Brooklyn, on December 02, 2014.
• Scott Kupferman filed major alteration job 301388772 for RES building with 31 apartments in Park Slope, Brooklyn, on August 15, 2002.
• Greg Fournier filed alteration job B01250007 for 1,561 sqft RES building with 31 apartments in Park Slope, Brooklyn, on September 11, 2025.
• Greg Fournier filed alteration job B01170682 for 1,000 sqft RES building with 31 apartments in Park Slope, Brooklyn, on January 27, 2025.
• Greg Fournier filed alteration job B01166085 for 1,000 sqft RES building with 31 apartments in Park Slope, Brooklyn, on January 13, 2025.
• Greg Fournier filed alteration job B01145485 for 1,400 sqft RES building with 31 apartments in Park Slope, Brooklyn, on November 22, 2024.
• Greg Fournier filed alteration job B00875193 for 1,250 sqft R-3 building with 30 apartments in Park Slope, Brooklyn, on May 17, 2023.
Litigation:
• A $1 million lawsuit was filed 515655/2021 on June 25, 2021,seeking a judgment related to declare rent regulatedat 70 Prospect Park West.
• A $1 million lawsuit was filed 515655/2021 on June 25, 2021,seeking a judgment related to declare rent regulatedat 70 Prospect Park West.
• A $1 million lawsuit was filed 515655/2021 on June 25, 2021,seeking a judgment related to declare rent regulatedat 70 Prospect Park West.
• A $1 million lawsuit was filed 515655/2021 on June 25, 2021,seeking a judgment related to declare rent regulatedat 70 Prospect Park West.
• A $1 million lawsuit was filed 515655/2021 on June 25, 2021,seeking a judgment related to declare rent regulatedat 70 Prospect Park West.
Violations:
According to city public data, the properties have received $625 in ECB penalties, four housing violations, and $625 in OATH penalties in the last year.