I got an estimate for a deck for $8000 last April, the guy never was able to get to it during the summer. Then told me prices were to high, wait until spring, prices would go down. Todays estimate, $18,000, for brown treat lumber. This is just your basic 10'x16' rectangle, with a stairway. It is 15' high, but to be $10,000 higher in 1 year.