A sign for Green-Wood is already in place on one wing of the new L-shaped building at 750 5th Avenue, which was designed by Architecture Research Office. The bright green of the historic building pops against the sleek terra-cotta panels of the two-story building, and the onion dome of the greenhouse still manages to dominate the corner. Landscaping, by Michael Van Valkenburgh Associates Inc., is also in place. A green roof tops the one-story glass wing that connects the greenhouse to the new structure.