The Weston Volunteer Fire Department found heavy fire and smoke coming from the rear of the home when they arrived at about 1 p.m.
Saw Mill Road is shared with the town of Fairfield, and the Fairfield Fire Department responded after receiving 911 calls as well.
A joint effort between both departments quickly brought the fire under control, the Facbeook post said.
Three occupants and two pets escaped the blaze unharmed.
The Weston Fire Marshal is investigating the cause of the blaze.
Click here to follow Daily Voice Norwalk and receive free news updates.