I'm looking to hire out a concrete job. I have two pieces to do. One is a concrete pad next to my driveway that is 10 feet long by 10 feet wide and 4 inches thick. The other is a slab for a utility shed that I'm having built and is 16 feet wide by 20 feet long and 4 inches thick. My estimates are varying widely at this point. The slab near the drive way is ranging from $250 to $480 and the pad for the shed is ranging $800 for the low end to $3300 at the high end. The high estimate for the shed pad is including supports at each corner that are 12 inches wide and sunk 20 inches deep (which that contractor insists is needed). Code for my area requires the 4 inch slab with no supports if I am going to hook up electricity to the shed (which I intend to do later). I live in the Atlanta area (southwest of town).
Do either of these seem way too high or way too low? Does anyone think the
4 inch concrete pad for the shed is insufficient? My two main concerns are making sure a strong wind doesn't carry my shed away and that I meet code so I can get the electrical permit.Thanks,
Pick