Dorset and Wiltshire Fire and Rescue Service were called out to the block of flats in Welcome Avenue just after 10am this morning.
Six fire crews attended the incident from Swindon, Stratton St Margaret, Westlea and Royal Wootton Bassett Fire Stations
The aerial ladder platform was also needed to help evacuate four residents and a dog.
As the fire came under control just two crews remained at the scene with the fire now being investigated by the police forensics team.
