I have a problem with water drainage. When it rains hard, water accumulates under the house. The house has a crawlspace under it (no basement). During hard rains, up to 3 or 4-inches of water ponds underneath. This is pretty much under the whole house. It rained about a month ago, and it is still moist under the house. I notice that the house "swells" from the moisture - doors get stuck, etc. I bought this house a few months ago, and realized I had a problem. I just didn't realize how big a problem. I am going after the seller of the home, as this was undisclosed, but my problem is solving the water problem.
My question is this: Would installing perimeter drains and a sump and pump really solve my problem? Or would a french drain all around the house with a sump and pump be a better solution? Are there any other solutions I am missing?