Union Ave.: Perfectly situated in the heart of trendy East Williamsburg and just 1 block from the L and G trains, Union offers its residents the best of. Sugar Hill Capital Partners' Union Avenue stands in the hip and trendy Williamsburg. Built in , the building tops out at 6 stories and. Union Ave, Brooklyn, NY is a sq ft sq ft home sold in Brooklyn, New York. Welcome to Union Ave, the building the redefines living in the heart of Williamsburg. With stylish design and unbeatable location, living in Brooklyn was. Sugar Hill Capital Partners bought a unit apartment building at Union Avenue in Williamsburg from Madison Realty Capital for $. Union Ave, Brooklyn, NY is a sq ft sq ft home sold in Brooklyn, New York.