Architectural design firm WORKac, have completed the renovation of a historical building with a cast-iron facade in New York City, and transformed it into modern apartments. From the exterior, and only visible when looking down on it, is the rooftop addition, which New York City’s Landmarks Commission required to be invisible from the street level. However as the building is low compared to others around it, the designers had to get creative. They utilized three rooftop projections to mask the bulk of an addition: the triangular pediment of the historic Carey Building next door, and the circular pediment and an abandoned elevator bulkhead at the top of the building itself. The “shadow” created by these three projections created a zone for the addition and the opportunity for a distinctive angled form for the new roof. Inside the building, there are several apartments, with the top floor penthouse apartment having it’s own private outdoor deck. The new penthouse located on the 5th and 6th floor of the building comes with a secluded terrace overlooking the Woolworth Building. One of the brilliant ideas of the renovation was to transform the old elevator bulkhead into a hot tub. This outdoor terrace links to the living area inside. A rear mezzanine offers space for storage or a home office; it is from here that the inhabitants can enjoy views toward downtown and the Freedom Tower. The interior design is minimalist and contemporary, with nature-inspired elements bringing a fresh feel.