The Ontario Fire Marshal is investigating after flames completely enveloped a Stoney Creek Law office overnight.

Firefighters were called to the scene at Centennial Law Group at 19 King Street West at 12:33 a.m.

"When we got there, there was very heavy fire," said Hamilton fire Public Information Officer Claudio Mostacci. "The building suffered heavy damage."

Multiple trucks were called in, with aerial hoses positioned in the front and the back of the two-and-a-half storey building.

High winds made things tricky for firefighters, Mostacci said, but they managed to extinguish the flames within a couple of hours.

Luckily, no one was inside at the time.

Damages are estimated at over $500,000. Hamilton police officers are holding the scene until Fire Marshal investigators can examine it to determine a cause.

"Once we find out how it was caused, we can determine if it was suspicious or not," Mostacci said.