how much to drywall an old house
1 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. Patch kits to repair small holes in existing drywall are $2-$20; the more expensive kits contain materials to patch several holes or up to four feet of cracks. 2  Simple repairs can also be made using joint compound ($3-$15), a drywall hand saw ($5-$16) and average household tools such as a hammer, drill and utility knife.