Two crews from Ipswich were called to a property in Parade Road Ipswich on Wednesday lunchtime following reports of smoke from the loft the residential property.
On arrival there were reports of persons inside the building and a further appliance was then sent.
Crews used four breathing apparatus, two hose reels and a covering jet to extinguish the fire.
They used two thermal imaging cameras to check the property. The originating property and adjacent properties were ventilated by the crews.