We have had the same problems with our neighbors as well... unfortunately, we are surrounded by rental houses and it's hit or miss with new renters and their consideration. I have had to call the constable's office for late night noise before. It generally helps for a little while. The last neighbor I had problems with didn't like being woken up by a constable at 3am either so they left soon after. Our neighbors are much better now. Noise polution is a big issue of mine as well. I didn't move out here to have the same problems as apartment living, of my youth. Another issue I have is with the teenagers/young adults and their lound bass music when driving throgh the neighborhood. We hear it all the time and it drives me crazy. I wish there was a way to get it to stop.
I don't know if the Houston ordinances apply to us or not... since we don't live in the Houston City limits. It's worth a try though. I would be interested to hear from someone who knows for sure what ordinances do apply to us.