Construction to start this summer on 80 Flatbush, city’s first all-electric residential tower

An aerial view Boerum Hill, which will soon be home to the new 80 Flatbush developmet.

The first phase of Boerum Hill’s 80 Flatbush development is set to begin construction this summer, with a new school and the city’s “first all-electric residential tower” expected to be complete by 2024.

Phase one of 80 Flatbush, which has been renamed “The Alloy Block” after the project’s developer, will include a 480-foot, 44-story mixed-use building, and the construction of two schools, the Khalil Gibran International Academy high school and a public elementary school. The second part of the project will include an 840-foot tower that would be among the tallest structures in Brooklyn.

Alloy’s CEO and founder, Jared Della Valle, said the project is even more pertinent as the five boroughs continue to recover from COVID-19.

“We are committed to making Brooklyn beautiful, sustainable and equitable and as the city recovers from the pandemic, we hope the Alloy Block will set the standard for progressive, thoughtful development,” Della Valle said in a statement. “When it comes to taking the environmental impact of buildings seriously, building truly affordable housing in wealthy, transit-rich neighborhoods, and creating healthier school environments, we are proud to play a leading role as we begin construction on the Alloy Block.”


The building, with a residential address of 505 State St. and a retail address at 100 Flatbush Ave., will include 441 residences, including 396 market-rate apartments and 45 apartments marked affordable with rents as low as $750 per month, developed with the nonprofit Fifth Avenue Committee. The building will include a fitness center, workspace, and a rooftop pool.

The State Street building is being financed by a $240 million investment by Goldman Sachs, the Related Companies, and Ares Management Corporation, and Alloy is working in partnership with the Educational Construction Fund, a “financing and development vehicle” of the city’s Department of Education that helps fund combined occupancy structures including school facilities, according to the agency’s website.

The Khalil Gibran International Academy, a dual English-Arabic language school, will move into the new building at 380 Schermerhorn St. from its current 101-year-old building on the same block, allowing the school to expand. The new elementary school will be built at 489 State St. and will include a gym and auditorium accessible to the community.

A rendering of the new gym, which will be open for community use.Alloy

Alloy says that the building will be the “first all-electric residential tower” in the city, with functions normally using natural gas being conducted with electricity, such as stovetops, hot water heating, and HVAC. A spokesperson for Alloy said that by eliminating gas and going all-electric, the building can be “set up to purchase renewable energy sources from the grid and be carbon neutral upon opening.”

Alloy began buying up the block in 2015 with the intention of erecting the tallest edifice in Kings County. After objections to the planned 986 and 560 foot tower heights were registered by community members and by City Councilmember Steve Levin, the developers presented a scaled-down version at the current heights, and the required rezoning was approved by the city.

In total, the development is now expected to house about 850 residences, including 200 deemed affordable at 60 percent area median income, 40,000 square feet of retail space, about 500 bike parking spaces, and no car parking.

As with so many developments, the pandemic delayed construction, which originally saw phase one being completed in 2022. The pandemic also changed Alloy’s intended use for the building: the shorter tower was intended initially to include office space, but that was scrapped by the developer as demand for urban office space plummeted while people worked from home.

The taller building will now house some 200,000 square feet of office space, Alloy says.