Tasmania Fire Service said despite the family being home at the time, no one was injured in the blaze.
Three firetrucks and a car are onsite, alongside two Tasmania Police cars.
Tasmania Fire Service is attending a house fire on Outram Street in West Launceston.
At this stage, it looked as though the fire began in the garage. It's possible the fire was caused by welding equipment.
There two heavy pumpers, a light tanker, and a heavy tanker at the scene battling the blaze, with more on the way.
For more information, visit the TFS website.