One of the biggest "surprises" building my pool were the extra's. For example, the electrical and gas runs cost me an extra $2500 despite the PB including 250 ft with the contract. The way the electrician measured, I ended up needing 150 more feet of both electric and gas (which was way more than I measured). My advice is that you make sure everything is identical in the quotes. My pool is in North NJ.

John