The cost premium
An infinity edge (also called a vanishing edge or negative edge) adds $25,000–$75,000 to a standard gunite pool build. The variance is driven by the length of the edge and how much structural work is needed to build the catch basin and pump-back system.
What you're paying for
A separate catch basin below the pool that captures overflowing water. A second pump loop that returns catch-basin water to the main pool. Precise engineering — the weir edge has to be dead level. Higher-end tile and finish because the edge is the visual focal point.
When it's worth it
Infinity edges only make design sense on a lot with a downslope or a view that's worth framing (across a valley, toward a treeline, out over the Main Line's rolling terrain). On a flat lot with no view beyond, you're paying premium for an effect nobody sees. If your yard supports it, it's stunning.
