The Mississippi Mills Fire Department stations 1 and 2 responded to a structure fire on Sugar Bush Road in Pakenham at approximately 11:55 a.m. Tuesday morning. There was nobody in the house at the time of the fire. Firefighters were on scene for 5 hours. Mutual aid was activated for an additional tanker from Beckwith. The Ontario Fire Marshal investigator is assisting with the investigation to determine the cause of the fire. The damage is estimated to be around $200,000.