At 2307 hrs, Truck 58 was dispatched for a dwelling fire on West Liberty Road in Baltimore County. Shortly thereafter, Truck 58 called enroute with a crew of 6 and switched to B.C talk group 2. Chief 10 (Norrisville) was first arriving and advised nothing evident from exterior. With investigation inside the dwelling, he advised dispatch of a working chimney fire with extension into the first and second floor with heavy smoke. Engine 54-3 was first arriving engine, they pulled a 1 3/4 pre-connect and advanced to the roof. Truck 58 arrived on scene bringing the cutters edge saw, chimney box, thermal imaging camera, and hand tools. Truck crews split up into two groups, one to the roof and the other to interior. Roof crews cut three holes in the side of the house next to the chimney to open up the extension area. They pulled siding and continued to work the roof. Interior crews used hand tools and the saw to open walls up and cut studs to expose the chimney and the burning remnance around it. Crews from Baltimore, Harford, and York counties worked with extensive overhaul to ensure the fire and any extensions were extinguished. Truck 58 was placed available per command around 0110 hrs.