Drilling rigs are punching the last of 320 boreholes this summer on a full city block along the East River, where Lendlease is building a 789,000-sq-ft mixed-use complex of five buildings in Brooklyn’s Greenpoint neighborhood. While no one will see the 499-ft-deep holes when 1 Java Street opens in late 2025, they underpin the development’s signature feature as the largest residential geothermal system installed in New York state, and possibly in the U.S.

Situated on a 2.6-acre waterfront site, the five complex buildings will be connected—including a 37-story showpiece on stilts—that will house 834 apartments, 13,000 sq ft of retail, 27,000 sq ft of amenities, 276 parking spaces, a waterfront esplanade and a host of sustainable features. 

Underneath it all will be geothermal technology allowing the complex to use solely electric power—two years ahead of a 2027 New York City mandate—and slash its carbon emissions profile.

The geo-exchange system at 1 Java Street—which this year won $4 million from a New York State Energy Research and Development Authority (NYSERDA) pilot program—would cut annual heating and cooling emissions by 53% compared with traditional natural gas boilers and cooling towers, or by 1,050 metric tons of carbon dioxide.

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