Small Inground Pools Cost: Average Prices & Cost Factors

"Small inground pool" covers several different products: plunge pools meant for sitting and cooling off, spool and cocktail pools, semi-inground pools, and compact swimming pools in vinyl, fiberglass, or concrete. Each has its own price pattern, so the tables below separate them instead of folding everything into one average.

Figures come from This Old House, Lawn Love, and This Old House, checked on Oct 13, 2026. A smaller pool generally costs less than a full-size one, though excavation, equipment, permits, and site work may not shrink in proportion to the water volume.

Pool type and material set the starting point for the price.

A semi-inground pool is listed at $8,400 – $22,500, the lowest of the types shown. A plunge, spool, or cocktail pool is listed at $12,250 – $24,750. Standard pool materials run higher: a vinyl liner pool is listed at $24,000 – $44,000, a fiberglass pool at $24,335 – $70,000, and a concrete pool at $35,145 – $62,500. Those material ranges describe typical pools of any size, so a compact pool in the same material may land toward the lower end. A lap pool is listed at $30,000 – $67,500 and is shown for comparison.

A plunge pool is deep enough to stand or sit in and too small for laps. Many are prefabricated, which shortens installation but adds shipping. Starting prices from manufacturers listed by This Old House show how material changes the cost.

A precast concrete plunge pool starts at $28,500 for a 7-by-7-foot size. A container-style pool starts at $42,000 for a 20-by-8-foot size. A molded fiberglass plunge pool starts at $53,200 and includes equipment and installation. The first two prices include basic pool equipment but not shipping or installation, so the final bill for those options is higher. A crane to lift a pool over a house is a possible extra if there is no ground access.

Per-square-foot pricing is useful for rough budgeting, though it hides the fixed costs that make small pools expensive per foot.

In-ground pool installation is listed at $50 – $125/sq ft. Multiply by the surface area to get a ballpark, then expect a small pool to land above the low end because fixed costs get spread over fewer square feet.

The pool itself is not the full budget.

A heater for a small plunge pool is listed at $3,500. Permits are listed at $475 – $1,900, and the fee depends on your city or county. Fencing, decking, electrical work, and landscaping repair are other common extras that quotes may leave out.

The two main sources describe slightly different products.

This Old House lists $10,000 – $35,000 for a small plunge pool and gives $20,000 as a ballpark for an in-ground version. Lawn Love lists $12,250 – $24,750 for small custom pools such as plunge, spool, and cocktail pools. The ranges overlap, but the top ends differ, and the sources may count different features such as equipment, a heater, or site work. Read what each quote includes before you compare.

• Pool type and material. Semi-inground, vinyl, fiberglass, and concrete all price differently.
• Size and depth. Larger and deeper pools need more excavation and more water.
• Prefab or custom. Prefab pools are simpler to install but add shipping, and custom pools allow more design choices.
• Site access. Narrow gates, steep yards, and overhead lines can add labor or require a crane.
• Excavation and soil. Rock or poor drainage increases site work.
• Equipment. Pumps, filters, heaters, and covers are priced separately in many quotes.
• Permits and inspections. Pools are typically regulated, and local codes decide what is required.
• Safety features. Many areas require a fence or barrier around a pool, and the cost depends on local code.

A small pool suits a compact yard, a smaller budget, or a household that wants a place to cool off more than a place to swim laps. It also takes less time to heat, treat, and clean. A full-size pool gives more room for exercise and gatherings. A plunge pool is too small for lap swimming, so think about how you will use it before choosing a size.

Pool construction involves excavation, structural work, plumbing, and electrical wiring near water. Hire a licensed pool contractor, confirm they will pull the required permits, and ask about inspections at each stage. Check local requirements for fencing, gates, and covers, since inspectors check them. A contractor who skips permits can leave you with a pool that fails inspection or cannot be insured.

• What type and size of pool is quoted, and what is included in the price?
• Are shipping, crane work, and delivery included?
• Does the quote cover the pump, filter, heater, and cover?
• Who handles permits and inspections?
• What fencing is required, and is it included?
• What warranty covers the shell, equipment, and installation?