Units were called to the commercial area about 9:40 p.m., where they found smoke and fire coming from Sizzling Express Deli, which is located in an office building in unincorporated Herndon.
Firefighters encountered smoke and fire coming from the first floor of the four-story building upon arrival. Firefighters conducted an aggressive fire attack and quickly extinguished the fire, officials said.
There was no one in the restaurant when the fire broke out. The alarm company called 911 after a smoke alarm activated. There were no injuries.
Damage is estimated at $50,000.
Fire investigators have determined the fire was accidental and caused by an unattended pan on a hot stove.