| The Alloy Block | |
|---|---|
 | |
 | |
| Alternative names | 80 Flatbush, 100 Flatbush |
| General information | |
| Status | Under construction |
| Type | Mixed-use |
| Coordinates | 40°41′10″N 73°58′46″W / 40.68611°N 73.97944°W |
| Construction started | 2021 |
| Estimated completion | 2027 (Phase 1) |
| Height | |
| Roof | 482 ft (147 m) (100 Flatbush) |
The Alloy Block is an under-construction mixed-use development in Boerum Hill, Brooklyn, New York City, near Downtown Brooklyn. The first building at 505 State Street is 482 feet (147 m) high and contains 441 residential units and a retail base. A second building at 80 Flatbush Avenue will contain two schools, and the complex will include three additional buildings, including preexisting structures. The structures are being developed by Alloy Development.
The buildings were proposed in the late 2010s as a two-tower complex with residences and offices. Construction was delayed in the early 2020s, due to the COVID-19 pandemic in New York City, and the office space was removed from the plans. 505 State Street was topped out during 2023.