Choose a flat, open area with good drainage
Check local codes, utility lines, and setback requirements
Mark the pool footprint with stakes and string
Remove sod, grass, roots, rocks, and debris
Excavate high spots until the area is level
Fill low spots with compacted soil or sand
Compact the entire area in thin layers
Recheck level in multiple directions
Use a long straight board and a level to verify flatness
Add a layer of masonry sand or pool pad if needed
Compact the final base again
Install a level base material such as pavers or foam under supports if required by the pool
Confirm the finished surface is perfectly level before assembly