The garage was “completely ablaze” in Sidegate Lane on Saturday, calling out crews from Ipswich East and Princes Street.
Firefighters responded to reports of the blaze just before 3.30pm, which was connected to another garage believed to have diesel and a diesel heater stored inside.
The garage fire was extinguished at 4.35pm, more than an hour later, and the incident was closed just after 5.45pm.