At 2249 hours, Engine Companies 31, 33, Truck 30, and Tankers 33, 20 were dispatched to 35 Sunset Drive for a chimney fire. Tanker 31 arrived with a working fire in an occupied, 1 story, dwelling. The first alarm assignment was requested bringing Engine Company 29, Tankers 33, 17, 34, RIT 25, and Air 45. Several lines were stretched for fire in the attic. Tanker 6 and 37 were added to the box for additional water supply. The bulk fo the fire was knocked down in about 15 minutes with extensive overhaul necessary for hot spots. Units were out about 3 hours.