Mandarin Oriental Residences, Fifth Avenue is a renovation and vertical extension of an existing 20-story building. The steel and concrete office building was constructed in 1926, with an addition added in 2000. The new expansion and renovation includes converting 15 existing floors into residential and adding an additional 8 floors and mechanical penthouse. The new residences include 69 luxury units as well as a spa, gym, residents’ lounge, roof deck, and pool. The lower 5 levels are currently occupied retail floors which will remain operational throughout construction.