The only house in that area, matching the description is the one that almost "fell" into the gulf with the big rain a couple of years ago.
Water from rain and possibly from Gulf Place itself, flooded the area and the place fell...
I believe there is drainage still from Gulf Place and if you look on the beach, this house has a small pipe, actively dripping/running water from it, on to beach.
That's why sand is brownish there.
Code Enforcement was out there this week for something.
Believe there may be a law suit in there somewhere too.