Depending on the backyard configuration, you will likely need a rough minimum of 500 square feet for an in-ground pool.
However, the final minimum number will vary with the shape of the property. That’s because gunite pools allow builders to develop shrewd designs to maximize use of available space. Enormous versatility for pool size and shape is possible. A builder may even configure a pool that will use space from both your backyard and side yard.
Other factors may enter the equation and influence how much backyard space you can use and where the pool may be positioned. One is building codes, which vary by city. For example, most codes require pools to be 3 to 5 feet away from the house and the property line.
Keep in mind, you will need some area around the pool for decking. You may want to include other backyard features as well. Your builder will advise you of other considerations—as well as opportunities—for space-saving design solutions.
Learn more about pool planning: Pool Design Dimensions: 3 Key Initial Questions to Ask