Project description In a house with two or three bedrooms, convert unfinished space in attic to a 15-by-15-foot bedroom and a 5-by-7-foot bath with shower. Include a 15-foot shed dormer, four new windows, and closet space under the eaves. Insulate and finish ceiling and walls. Carpet floor. Extend existing HVAC to new space. Retain existing stairs, but add rail and baluster around stairwell.