No, it's not a new IKEA store, (the base would be blue) it is the expanded Brooklyn Children's Museum by Rafael Vinoly that opens on September 20. According to Nicholas Tamarin at Interior Design, it is the "city's first LEED Silver-certified museum."
"Rapidly renewable and recycled materials were specified wherever possible, including bamboo and recycled rubber flooring. Geothermal wells [sic-see here] are used for heating and cooling purposes, a first for New York museums. Photovoltaic cells on the exterior walls convert solar energy directly into electrical power, and energy-saving sensors control interior lighting and ventilation systems." ::Interior Design
Other LEED certified museums in TreeHugger:
David Adjaye's Museum of Contemporary Art Denver
Renzo Piano's Green Museum in San Francisco
It's a Mammoth Museum by Leeser for Yakutsk
More on Rafael Vinoly in TreeHugger
Battersea Power Station Sets an Example