In a recent post, I noted the trend of more college kids living at home because of the recession. Note to stay-at-home-students: Don't expect too many perks besides the break on living expenses and Mom’s cooking. Like, say, a quiet room where you can study. In a recent survey, our experts found that the average cost to remodel a 12-foot by 12-foot room into a home office, including custom cabinets and wiring for phones and electronics, is $27,193. That doesn’t include the computer.–Jean Pietrobono