Firefighters battled a fire at the former Nektar martini bar at 451 Elmwood Ave. in the Elmwood Village early Sunday morning.
Firefighters responded to a report of smoke called in by an ambulance crew. The one-story building was under renovation to become a restaurant.
No injuries were reported, and the cause of the fire is under investigation. Damage was estimated at $10,000 to the building and $10,000 to the contents.