33 East 23 Street

Flatiron District, Manhattan

Parcel ID (BBL): 1008530002

Acris records

Owner: Sl Green Realty

Acquired: December 17, 2021, $290.6 million

Debt: April 10, 2026, $1.6 billion

Built: 1932

Renovated: 2020

SF: 1,233,394

Dwelling units: 0

No. of buildings: 1

Class: Tower Type (O4)

Floors: 26

Legacy BBLs: 1008531001

Transactions:

• SL Green Realty, Hines, National Pension Service of Korea and Mastern Investment Management borrowed $1.6 billion from Wells Fargo, JPMorgan Chase, Bank of America, Goldman Sachs and Deutsche Bank for 1 Madison Avenue, Flatiron District, Manhattan on April 10, 2026.

• SL Green Realty borrowed $75 million from Wells Fargo for 1 Madison Avenue, Flatiron District, Manhattan on December 30, 2025.

• SL Green Realty, Hines and National Pension Service of Korea borrowed $75 million from Wells Fargo, TD Bank, Goldman Sachs, Bank of America, Deutsche Bank and Axos Bank for 1 Madison Avenue, Flatiron District, Manhattan on July 07, 2025.

• SL Green Realty, Hines and National Pension Service of Korea borrowed $100 million from Wells Fargo, TD Bank, Goldman Sachs, Bank of America, Deutsche Bank and Axos Bank for 1 Madison Avenue, Flatiron District, Manhattan on September 11, 2024.

• SL Green Realty, Hines and National Pension Service of Korea borrowed $575 million from Wells Fargo, TD Bank, Goldman Sachs, Bank of America, Deutsche Bank and Axos Bank for 1 Madison Avenue, Flatiron District, Manhattan on December 22, 2022.

Development:

• John Krush filed major alteration job 123742101 for 1,256,360 sqft B building in Flatiron District, Manhattan, on November 14, 2019.

• John Krush filed major alteration job 121206195 for 1,039,409 sqft B building in Flatiron District, Manhattan, on September 17, 2019.

• Thomas Bentsen filed alteration job M01381391 for 680 sqft B building with 0 apartments in Flatiron District, Manhattan, on May 06, 2026.

• Gianna Pilalis filed alteration job M01362907 for 385 sqft 56 building with 0 apartments in Flatiron District, Manhattan, on April 23, 2026.

• Gianna Pilalis filed alteration job M01362879 for 385 sqft 56 building with 0 apartments in Flatiron District, Manhattan, on April 09, 2026.

• Gianna Pilalis filed alteration job M01377301 for 5,000 sqft 56 building with 0 apartments in Flatiron District, Manhattan, on March 30, 2026.

• Gianna Pilalis filed alteration job M01377344 for 5,000 sqft 56 building with 0 apartments in Flatiron District, Manhattan, on March 30, 2026.

Litigation:

• SL Green Realty filed a $5 million lawsuit 654397/2023 against 777 Partners on September 08, 2023,seeking a money judgment related to office leaseat 1 Madison Avenue.