Real Estate Law USA.com

I have a few questions but the most important question is What can I do?

Situation

My husband and I bought a house brand new in 2004 from the builder Pine Grove Corporation

There was a drainage stream about 4 foot wide and maybe two feet deep when we purchased the home in the far back corner of the property. Since my family home has a creek that floods we asked if this creek would flood (The answer to that was no it will not flood the stream it is just a run off for rain} Well it floods and floods bad one neighbor just lost their house over their little run off and I had to be taken from my house in a rescue boat even though the water never made it into the house itself just up to the porch) On our survey from the builder it states that there in no creeks, streams, lakes, river, or running water near the property,

Question How can they state this when it goes through everyone’s property?

Next Situation
The family that lost their house the insurance company is still going through their case but they found out the builder did not have the permits to build our houses where he did, his company built 20 house in wetland?

Question
What if anything can the home owners do? Can we sue the builder? And what are the odds of us winning?

I think he should at least buy the houses back with the land since it came in a package deal when he sold it. I don’t even care about the thousands I have put into this house I just want the builder to reimburse the homeowners on what we paid him.