12 Main Street, #3, Nantucket, MA, Massachusetts 02554. This is a unique investment opportunity in an excellent downtown location, offering exposure, convenience, and a secure foothold on the island. 590 sq ft space located in historic Main Street building at the corners of Main Street and Washington Street. The interior is light-filled featuring beautiful windows, freshly painted walls, and a private location on the second floor. The office includes a second floor hall half bath in the common area that is shared with Unit 4. Furnishings in first photo are a rending and intended for illustrative purposes only.