Once celebrated as the flagship of Manhattan’s supertall condominium towers, 432 Park Avenue has become mired in controversy, legal battles, and reduced property values. Standing at nearly 1,400 feet, it was the tallest residential building in the world at the time of its completion in 2015, and touted as a marvel of Engineering. But behind its “façade” (more on that later) was a building plagued by complaints of operational, cosmetic, and structural defects.