126 5 Avenue

Owner: Senlac Ridge Partners

Acquired: July 31, 2020, $59.4 million

Debt: November 01, 2022, $142.9 million

Built: 2023

Renovated: 2024

SF: 265,855

Dwelling units: 180

No. of buildings: 2

Class: Semi-Fireproof With Stores (D7)

Floors: 6

Legacy BBLs: 3009430240.00000000

HPD Ownership Registration Information

Last registered: 2026-03-18 (expires 2026-09-01)

Transactions:

• Senlac Ridge Partners and William Macklowe Company borrowed $142.9 million from Sumitomo Mitsui Trust Bank for 120 5th Avenue, Park Slope, Brooklyn on November 01, 2022.

• Senlac Ridge Partners borrowed $18 million from 10-120 5ave Lender, LLC for 120 5th Avenue, Park Slope, Brooklyn on April 08, 2021.

• William Macklowe Companies borrowed $18 million from 10-120 5Ave Lender, LLC for 128 5th Avenue, Park Slope, Brooklyn on July 31, 2020.

• Avery Hall Investments sold 128 5th Avenue, Park Slope, Brooklyn for $59.4 million to William Macklowe Companies on July 31, 2020.

Development:

• Avery Hall filed new building job 321191410 for 123,381 sqft R-2 building with 120 apartments in Park Slope, Brooklyn, on October 10, 2017.

• Avery Hall filed new building job 321191394 for 52,012 sqft R-2 building with 40 apartments in Park Slope, Brooklyn, on October 10, 2017.

• Gary Griggs filed alteration job B01402699 for 1,876 sqft M building with 131 apartments in Park Slope, Brooklyn, on May 29, 2026.

• Gary Griggs filed alteration job B01366088 for 1 sqft building with 180 apartments in Park Slope, Brooklyn, on March 06, 2026.

• Gary Griggs filed alteration job B01351207 for 13,764 sqft M building with 49 apartments in Park Slope, Brooklyn, on January 27, 2026.

• Gary Griggs filed alteration job B01327192 for 13,764 sqft M building with 49 apartments in Park Slope, Brooklyn, on December 23, 2025.

• Gary Griggs filed alteration job B01258055 for 16 sqft building with 131 apartments in Park Slope, Brooklyn, on August 07, 2025.

Violations:

According to city public data, the properties have received $3,210 in OATH penalties in the last year.

Latest Stories:

• Senlac, William Macklowe sign $142.9M construction loan with Sumitomo for new dev project in Park Slope (November 02, 2022)

• Senlac Ridge Partners borrows $18M for dev site in Park Slope (April 09, 2021)

• Senlac Ridge, William Macklowe pay $59.4M to Avery Hall affiliate for dev site in Park Slope (August 03, 2020)

• Senlac Ridge, William Macklowe borrow $18M to acquire property in Park Slope (August 03, 2020)