material cost for drywall
1 Drywall materials (drywall sheets plus screws or nails, joint compound, tape, etc.) average 25 cents - 65 cents a square foot; professional installation is an additional 85 cents -$1.50 per square foot. Installing new drywall on the walls and ceiling of a 12x12-foot-room with 8-foot-high walls means about 530 square feet of drywall. 2  For about 4,000 square feet of drywall on all the walls and ceilings of a small home, it's $4,400-$8,600 or more.