It depends on the size of the pool and what type of enclosure you want. Generally speaking, an enclosed pool will cost more than an open-air pool. You can get a good idea of approximate costs by contacting a swimming pool contractor in your area.

It can cost anywhere from $500 to $10,000 or more, depending on the size and complexity of the enclosure. Some things you'll need to consider include the material for the enclosure (e.g., wood, PVC, metal), whether you want it to be screened in or not, and whether you want a roof or not. You'll also need to factor in the cost of labor if you're hiring someone to do it for you.