Like most hedge fund moguls, Steve Cohen hasn't been having a very good run recently. (His flagship fund is reportedly down 18 percent so far this year.) But that isn't stopping the billionaire from making some home improvements: The proud owner of one of the most over-the-top estates in America is now looking to make his mansion even bigger. Last night, an application by Cohen and his wife, Alexandra, was put before the Greenwich Planning and Zoning Commission. The couple is seeking permission to add another 1,145 square feet to their already-massive 35,000-square-foot Crown Lane home. There's no word just yet as to whether the request was approved. There's also no word on what exactly the Cohens plan to use the additional space for, especially since the estate already has a basketball court, indoor pool, 6,734-square-foot ice skating rink (along with a separate structure to house the Zamboni), and about half a billion dollars in art scattered in every direction. A few photos of Cohen's estate are located here.