I am a General Contractor, my electrical subcontractor has said a roll of romex wiring for residential construction has gone from $25 a year ago to $125 at this time. In fact many materials costs will rise significantly from the time you put a qoute together for a job and the time you purchase for the job. Most wood products had a huge run up last summer with Katrina and of course they have for the most part remained at those levels.