One of the best things you can do for your resale value? Skip the pool. Many prospective buyers want nothing to do with these money pits. For one, they're a potential safety hazard for young families and pets. Secondly, an in-ground pool can cost more than $2,000 a year to maintain—and that doesn't even include water. Swimming pools can cause a spike in your homeowner’s liability insurance, not to mention take up prized backyard leisure space. If you simply must swim, take a fraction of the money you would have spent and invest in a gym membership.