Alloy to build "world's tallest Passive House" skyscraper in Brooklyn

New York-based architecture studio and developer Alloy Development has announced One Third Avenue, a 63-storey skyscraper set to be built to Passive House standards and be the second tallest building in Brooklyn.

The skyscraper will reach 220 metres (725 feet) and will contain 583 apartments from floors 11 to 60, 152 of which will be affordable. It will also contain six floors of office space on its lower levels.

The Alloy Development (Alloy) design shows a cubic tower with a gridded facade. A darkly clad podium sits at the bottom, with a restaurant pictured on street level and a terrace on top.

One Third Avenue joins the neighbouring 505 State Street tower as part of the wider Alloy Block in Downtown Brooklyn, a mixed-use development set to be the borough's "most sustainable block" and includes two new branches of New York public schools.

"Alloy Development today announced the second phase of the Alloy Block in Downtown Brooklyn and the tallest Passive House building in the world, One Third Avenue," said Alloy.

Like the two schools on the site, One Third Avenue will be built to Passive House standards, which Alloy CEO Jared Della Valle describes as "incredibly challenging".

"One Third Ave will raise the bar for sustainable urban development," said Valle. "Developing a Passive House building at this scale will be incredibly challenging, but the payoff will be significant with high-quality living that remains environmentally friendly and energy efficient."

"The second phase of the Alloy Block will demonstrate new possibilities to the industry and stand as an example of a solution that helps stall climate change."

The building will feature large operable windows as well as an "airtight, well-insulated building envelope" and filtered fresh air as part of achieving Passive House standards.

Residential and office spaces will also "share energy resources" to decrease waste heat, according to Alloy.

An interior rendering shows a living room topped with concrete ceilings and flanked by large, square windows.

Upon completion One Third Avenue will be the second tallest skyscraper in Brooklyn, second to the 325 metre-tall Brooklyn Tower by SHoP Architects.

Construction is expected to begin summer of 2025, with completion slated for 2028.

It will mark the completion of the wider Alloy Block, as all other buildings on the site are now open.

They include two historic buildings converted to retail spaces and two schools contained in one building by local studio Architecture Research Office.

The 44-storey 505 State Street tower by Alloy also recently wrapped up construction. It is the city's first all-electric tower, according to the developer, while in Manhattan, Foster + Partners is nearing completion on the city's "largest all-electric tower", a supertall skyscraper that will contain a new JPMorgan headquarters.

Alloy operates as a development and architecture firm in New York City. It also completed a block of skinny townhouses in Dumbo.

The images are courtesy of Alloy Development

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