At approximately 0925 hrs 52 (Brookhaven), 45 (Parkside), 57 (Upland), 47 (Chester Township), 50 (Middletown), 63 (Greenridge for the RIT), and 23 (Media for the RIT). Were dispatched to the 3000 block of Ridgewood Ln for the building fire just after dispatch 52-10 (Cornog) arrived reporting a working fire. Engine45  responded with a crew of 6 and arrived first due and placed a 1 3/4" and 2 1/2" hose-line's in service on the lower level of the B/C corner of the building.  Engine 45's crew knocked a large bulk of the fire down before 52 command gave the go ahead to make entry and check for extension. 52, 57 and 50s crew assisted with fire suppression and ventilation while 63 had the Charlie side Rit and 23 and the Alpha side Rit. All crews worked well to bring the fire under control.