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A semi-inground pool offers a sweet spot between cost and durability—tougher than an above-ground model yet far less expensive than a full in-ground build. Lifespans range from roughly seven to 75 years, depending on the materials you choose. They’re also a smart choice for challenging sites, such as sloped yards or locations with rock or high groundwater, which can make installing a traditional in-ground pool difficult.

Depending on the build, your timeline can be as short as two days or as long as five weeks. Lowering an existing above-ground pool a few feet takes three to five days. Building a raised in-ground pool with concrete walls and a retaining wall takes several weeks. Remember to factor in contractor schedules and permit approvals—they can tack on a few extra days at either end.

With standard liners, a semi-inground pool lasts seven to 15 years. Upgrade to a concrete shell and you’re looking at up to 75 years of service. As with any pool, top-tier materials and consistent maintenance are the key to achieving long-term durability, allowing you to plan your investment and upkeep with confidence.

Most semi-inground pools fall between three and eight feet deep. Lap pools, for instance, stay around four feet throughout, while family-style models may pair a shallow end with a deeper section. Your liner choice and how much soil you remove ultimately set the depth, and both decisions influence the project’s final price and layout.