Architects at Alloy Development have shared renderings of a new infill tower that will reshape Downtown Brooklyns skyline. One Third Avenue is phase two of Alloy Block, a mixed-use development of market-rate and affordable housing, retail, and commercial office space thats home to New Yorks first passive public school. The future, 63-story building will go up at the intersection of 3rd Avenue, Schermerhorn Street, and Flatbush Avenue. It will be tucked behind two historic buildings from the 1800s, a new passive house school by Architecture Research Office (ARO), and another, albeit shorter 44-story tower at Alloy BlockNew Yorks first passive skyscraper.One Third Avenue will rise 725 feet, making it just over 200 feet taller than its iconic neighbor, the Williamsburgh Savings Bank Tower by Halsey, McCormack & Helmer. One Third Ave will raise the bar for sustainable urban development, Alloy CEO Jared Della Valle said in a statement.The infill tower will be built behind two historic buildings from the 1800s. (Courtesy Alloy Development)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, Della Valle added. 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.There will be a total 583 apartments at One Third Avenue. Of those, 152 will be affordable; those flats will be between floors 11 and 60, Alloy said. The architects will simultaneously reuse two historic 19th-century buildings which are on the site today on the corner of State and Schermerhorn Streets. Those buildings will be converted into retail. The podium level of One Third Avenue will rise six floors and have office space. This portion will be elevated 100 feet above grade, and have a total 11,300 square feet of leasable area per floor.The portion of the building which abuts the historic 1800s architecture will match the contexts materiality and scale. (Courtesy Alloy Development)The facade of One Third Avenue will be orthogonal and square, not unlike the supertall by Rafael Violy in Midtown Manhattan. The facade by Alloy however will have a darker hue, and the oversized windows will be 6 feet by 7.5 feet, while still adhering to Passive House standards, architects said.The oversized windows will be 7.5 feet tall and 6 feet wide. (Courtesy Alloy Development)The envelope will be well-insulated and airtight, while still allowing for fresh air to filter in, making for a low carbon footprint. One Third Avenues residential and office spaces will share energy systems to minimize waste heat.The lot Alloy Block is sited upon is a lively one often clogged with traffic and high-pedestrian volume. In response to this condition, entrances at One Third Avenue will be within the existing 44-story tower on the site overlooking a quiet, tree-lined street. The commercial lobby will face Schermerhorn Street, which makes sense given its foot traffic.The project will redefine Downtown Brooklyns evolving skyline. (Courtesy Alloy Development)One Third Avenue is slated for completion in 2028.