The " Three-Decker" house originated in New England in the
later part of the nineteenth century. Although "Architectural Purists"
believe that the Three-Decker was derived from the French Flat
apartment house, it more likely evolved from Mansard-Style Row houses,
with their characteristic third floor occupancy. The Three-Decker now
provided inexpensive housing for three families in a relatively small
These Three-Story buildings usually provide five or six rooms on
each floor. Many of the Three-Deckers characteristically place front porches
on each floor.