What a custom pool costs in the Seattle area

How much does a custom pool cost in the Seattle area? It is the first question in almost every conversation we have, and the honest answer is a range. Regional cost guides put a straightforward inground build at roughly $60,000 to $100,000, while the fully custom projects we specialize in — engineered shells, infinity edges, integrated spas — typically start well above that and climb with the site and the finish list.
The single biggest variable is the ground itself. Flat, accessible lots keep excavation and structure predictable. Sloping sites — common across Seattle, the Eastside and Snohomish County — need engineered shells, stepped footings and sometimes retaining walls, and that structural work can move the budget more than any visible feature. Access matters too: if equipment cannot reach the yard, everything slows down and costs more.
The next tier of the budget is what you can see. Interior finishes run from standard plaster up through pebble and glass tile. Features like tanning shelves, raised spas, spillovers and vanishing edges each add real cost — and real value. Heating, automation and covers round out the number: in Western Washington a properly sized heater and an automatic cover are what turn a summer pool into a year-round one.
Our advice to anyone budgeting a pool in the Seattle area: decide what the pool is for before you price it, design in fall or winter so you are ready to break ground in spring, and budget a contingency for site surprises. A well-built pool is a decade-scale investment — the shortcuts show up years later, which is why we over-engineer structure first and let the finishes follow.

