At 12:22 reports of a Structure Fire came out requesting a full response. On Imperial Ave in Sugarloaf a worker was doing work in a house when for unknown reasons a fire broke out. Big Bear Fire crews from station 282 were first on scene and reported smoke showing from the sub floor. Crews were able to knock down the fire with in minutes and aired out the house. Very minimal damage was reported at the scene. All other incoming units were staged and canceled. The cause of the fire is unknown at this time. Quick work from Big Bear Fire Department prevented any major damage.