Unless you've got loads of time (and expertise) to spend on your project, the best way to add sweat equity is up front, by handling your own demolition, or at the back end, by doing some of the finish work yourself. "If you want to save money, dig in and start helping out," says Tom Silva. "You can insulate, you can paint, you can sand." Or better still, he says, help with cleanup every day. "Instead of paying someone to pick up sawdust off the floor, put your money into the time it takes to trim the window properly," he advises.
Cost for construction crew to handle cleanup: $200 per day
Cost to do it yourself: $0
SAVED: About 3 to 5 percent of the overall job cost