Brooklyn's first supertall building, JDS Development and Chetrit Group's 9 DeKalb, has officially broken ground.

Machinery is on-site and excavation has begun for the tower, planned to stand 1,066 feet tall in Downtown Brooklyn, NY Yimby reports. Designed by SHoP Architects, it is planned to contain about 500 rental apartments. Originally dubbed 340 Flatbush Ave. Extension, the project is being built by-right, but not without complications.

The Dime Savings Bank at 9 DeKalb, built in 1906, was historically designated in 1994 for both architecture and internal design, and as such will be preserved and integrated into the tower. It will be part of 100K SF of retail space at the base of 9 DeKalb. JDS and Chetrit acquired the bank and its air rights in 2014 for $90M after purchasing the neighboring development site for $43.5M.

With concrete pouring not expected for a few months, the initial delivery projection of early 2019 is likely to be pushed back to 2020 or later.