The Boston Fire Department reports firefighters responded to 34 Fessenden St. around 10 p.m. on Friday for what turned into a two-alarm fire.
Firefighters were ordered out of the building after one fell through a porch. He was uninjured and continued to help battle the fire, the department says.
The fire started in the basement and got up to the second floor.
Damage was estimated at $250,000.