171 15 Street

Owner: Greenbrook Partners

Acquired: January 15, 2021, $3.9 million

Debt: January 15, 2021, $1.6 million

Built: 1925

Renovated: 1959

SF: 6,264

Dwelling units: 8

No. of buildings: 1

Class: Over Six Families Without Stores (C1)

Floors: 4

HPD Ownership Registration Information

Last registered: 2026-01-20 (expires 2026-09-01)

Transactions:

• Greenbrook Partners borrowed $1.6 million from Rialto Capital Management for 171 15th Street, Park Slope, Brooklyn on January 15, 2021.

• Raj Associates sold 171 15th Street, Park Slope, Brooklyn for $3.9 million to Greenbrook Partners on January 15, 2021.

Development:

• Freestone Property Group filed alteration job B01319628 for 650 sqft RES building with 8 apartments in South Slope, Brooklyn, on June 09, 2026.

• Keqi Wei filed alteration job B01139303 for 260 sqft RES building with 8 apartments in South Slope, Brooklyn, on December 12, 2024.

• Greg Fournier filed alteration job B00888710 for 600 sqft RES building with 8 apartments in South Slope, Brooklyn, on June 20, 2023.

• Greg Fournier filed alteration job B00579484 for 400 sqft RES building with 8 apartments in South Slope, Brooklyn, on August 25, 2021.

• Greg Fournier filed alteration job B00575185 for 400 sqft RES building with 8 apartments in South Slope, Brooklyn, on August 25, 2021.

Violations:

According to city public data, the properties have received three DOB violations, $12,500 in ECB penalties, one housing violation, $100 in OATH penalties, and two housing litigations in the last year.