I don't live in Texas, but I'm in a similar situation. My husband and I are looking to get a pool installed in our backyard as soon as possible. We've had the most success in looking up different pool services in our area and reading reviews for each. We're going to make our decision based on the reputations of each. Hopefully we find someone good! http://thepoolandspawarehouse.com/pools/

I'd recommend starting with Wet Pools and Pulliam Pools. We also live in south Katy and built last summer. Loved both companies, but we ultimately went with Wet Pools because they offered much more of what we wanted included in their quote. We have friends who also live in Katy that built with Pulliam recently as well and had a fantastic experience. I'd recommend getting quotes from at least 3 builders before deciding. Good luck!

Watts Pools. Can't go wrong.