Adding in a swimming pool to your home can greatly increase its resale value, and it can do a lot to improve the curb appeal. Of course, those homeowners with families who simply want to take advantage of a warm climate will also get plenty of personal use from an outdoor pool or perhaps even a spa. Since this can be a big-ticket item, adding or upgrading your existing pool or spa is generally a big decision that needs to be carefully budgeted. Let this guide help you better understand some of the various costs associated with building a new pool, heating a pool, adding a spa or repairing an existing pool.