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Gold Coast Outdoor Living · Long Island

What a Semi-Inground Pool Really Costs on Long Island

Typical complete project: $35,000–75,000 installed

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Written pricing at the design stage. No obligation.

Most complete semi-inground pool projects on Long Island land between $35,000 and $75,000 — pool, installation, and the surrounding hardscape. That is roughly half of what a comparable gunite inground runs, and the range is wide because the surround, not the pool, is where budgets diverge.

Here is where the money actually goes. Every Gold Coast Outdoor Living project gets a fixed written number at the 3D design stage — these ranges are what projects across Nassau and Suffolk actually run in 2026.

Where the money goes

Line itemTypical rangeWhat drives it
Pool kit (walls, structure, liner)$12,000–25,000Size, wall system, and liner grade. Aluminum and galvanized systems hold up best in coastal air.
Excavation & site prep$3,000–8,000Partial-depth dig, base material, and grading. Tight access or heavy slope pushes the top of the range.
Installation & assembly$6,000–12,000Pool set, filtration, plumbing runs, bonding, and electric by licensed trades.
Retaining walls & backfill$4,000–10,000What holds the recess and transitions the grade — engineered, drained, and finished.
Decking, coping & surround$8,000–25,000The paver deck and coping that make it read built-in. The single biggest style-driven variable.

Typical complete project: $35,000–75,000 installed

What moves your number

The water table on your street

The closer groundwater sits to the surface, the shallower the recess and the more the design leans on raised hardscape. It changes the mix more than the total.

How much surround you build

A gravel-and-grass finish and a full raised paver environment can sit $20,000 apart on the same pool.

Access

Machine access through an open side yard versus hand-carrying through a 4-foot gate changes excavation and install time meaningfully.

When you book

Design in fall or winter puts installation early in the season. Pools booked in May swim in August.

Cost questions, answered

How much does a semi-inground pool cost on Long Island?

Complete projects — pool, installation, and hardscape surround — typically run $35,000–75,000. Pool-and-installation-only packages, with a simpler finish instead of a full paver environment, can start around $20,000–30,000.

Is a semi-inground pool cheaper than an inground pool?

Significantly. Comparable gunite projects on Long Island commonly reach $80,000–150,000 once decking, fencing, and site work are counted. A semi-inground delivers the built-in look for roughly half.

What does a semi-inground pool cost to run?

The same as any pool of its size: in-season electric and chemicals typically run $50–150 per month depending on pump efficiency and cover use.

Can I finance it?

Yes — financing is available, and the fixed design-stage price means the amount you finance is the amount you pay.

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