Firefighters said they saw flames when they arrived shortly after 9:00 a.m.
There were reportedly cats in the building, but they are believed to have gotten out.
No one was hurt and the building is a total loss.
“Only challenge is the limited manpower during the day. Getting the volunteers out and, again, no hydrants. It was over a thousand feet away for us to get water to the fire. Again, that’s why mutual aid comes in with the tankers to supply us water until were able to get that line laid and get water from the pond,” Chief Charles Steinhart V with North Stonington Volunteer Fire said.
The fire marshal told News 8 the fire had been ruled accidental.