The house is in a flood zone. While it has never flooded and it is only the yard that gets the water when the creek rises, if water should ever get close enough to the house to come in, it would end up under that flooring. The concrete is actually probably less expensive than having the wood flooring put in. This house is on a concrete slab, so it's simply adding to the existing slab. It should cost about $1000. The house would be less dated and much easier to move things around and live in. Especially in this world of more and more ADA features in homes.