Crews from Mansfield and Ashfield attended the scene of a fire inside a flat on Ash Grove, Skegby.
Firefighters wearing breathing apparatus used two hose reels to tackle the blaze and a short extension ladder was used to access the property.
A positive pressure ventilation fan was used to clear the smoke.
The incident had been dealt with by 3.31am.
A investigation into the cause of the fire is underway.