Fire broke out at a furniture godown near Mumbra township of the district in the wee hours, officials said.
No injury or casualty was reported in the mishap.
The blaze erupted at the godown in Aachar Galli near Shilfata close to Mumbra at around 2 AM, Thane Municipal Corporations disaster control cell Chief Santosh Kadam said.
Two fire engines and six water tankers managed to control the flames after hectic efforts for about six hours, he said.
The cause of the fire was yet to be ascertained, he said.