One fire appliance from Melton and one from Oakham were called to Bramley Close just after 12.20am.
Before firefighters were able to get the fire under control, flames spread to the fascia and soffits of two properties, also damaging an electricity box and gas meter box. This led to gas and electricity engineers being called out.
Flames were extinguished by 1.10am and firefighters were damping the area down, but they found the gas supply had been ruptured and was leaking gas. Further engineers from the National Grid were called out to dig out and fix a gas pipe.
A spokesman for Leicestershire Fire and Rescue said the cause of the blaze is under investigation.