You have two options when buying a pool: above ground or in-ground. The cost for an in-ground pool starts at about $20,000, and varies depending on the size of the pool and degree of customization. Other details, such as decking, landscaping, safety equipment, automated maintenance and heating systems cost extra. If selecting an in-ground pool, you’ll first need to decide on a liner. There’s a variety to choose from. Your pool professional should direct you to which model is best for you and your yard’s shape and size.