Method and apparatus for mounting a door frame in a building

An improved apparatus for mounting a door frame to a door opening defined by walls of a building, wherein the door opening is defined by a pair of side surfaces of the walls, and a floor substantially parallel to a top surface of the walls, wherein the floor and the top surface extend between side surfaces of the walls, comprising:

• at least one mounting bracket, wherein the at least one mounting bracket is connectable to at least one side surface of the walls;
• a plurality of mounting pins connected to the at least one mounting bracket;
• a first door support frame having a soffit integral with the first door support frame;
• a plurality of soffit engaging portions connected to and enclosed within the soffit;
• a plurality of bracket engaging portions integral with the plurality of soffit engaging portions for engaging the plurality of mounting pins on the at least one mounting bracket and connecting the first door support frame to the at least one mounting bracket;
• and
• a trim frame connected to the plurality of bracket engaging portions and the plurality of soffit engaging portions for securing the trim frame to the first door support frame.