Pool Cost Calculator

Estimate what an inground pool costs by type, size and extras: vinyl, fiberglass or concrete shell plus decking, code barrier fence, heater and yearly upkeep.

By CalcBuilt Editorial TeamUpdated September 9, 2026Formulas checked against manufacturer specs, see how we calculate.

Quick answer: To budget an inground pool, price the shell by water surface area for the type you want, then add decking, the required barrier, and equipment. A 16 x 32 ft fiberglass pool with 600 sq ft of decking and 120 ft of barrier fence typically runs $57,600 to $98,700 installed in 2026.

Your measurements

A rectangular volume: length times width times depth.

Pool lengthftWater surface, not the deck. Most family pools are 14 x 28 to 18 x 36 ft; a fiberglass shell tops out near 16 x 40 ft because it ships on a truck.Pool widthftPool typeTypical 2026 installed prices per sq ft of water surface: vinyl $75 to $125, fiberglass $95 to $160, concrete $125 to $220. Regional labor and access move these more than brand does.Finish levelCoping, interior finish, tile and lighting. Upgraded runs about 20% over the base package; builder basic saves about 10%.Decking areasq ftBroom-finish concrete, pavers or travertine around the pool, typically $10 to $18 per sq ft installed in 2026. A 4 ft walk-around on a 16 x 32 pool is about 500 to 700 sq ft.Barrier fence lengthftA barrier is required, not optional (ISPSC 305, IRC Appendix AG). Aluminum or mesh pool fence typically runs $25 to $50 per ft installed in 2026, with self-closing gates at the high end.HeaterGas heats fast and costs more to run; a heat pump is cheaper per hour but needs air over 50 degrees. Gas also needs a line sized for 250,000 to 400,000 BTU.ExtrasAn automatic cover typically runs $12,000 to $22,000 installed and counts as a powered safety cover under ISPSC 305 in most jurisdictions. Salt systems typically run $1,500 to $2,500.

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Results

Total installed range: $57,600 to $98,700; Typical 2026 US installed cost for a 32 ft x 16 ft fiberglass shell pool, standard finish
Pool shell and installation: $48,600 to $81,900; 512 sq ft of water surface. A molded shell set in one day, so the site work and the deck drive the schedule; sizes stop at about 16 x 40 ft because the shell travels by truck
Site work and extras: $9,000 to $16,800; 600 sq ft of decking, 120 ft of barrier fence. Deck at $10 to $18 per sq ft, fence at $25 to $50 per ft
Cost per square foot of water: $113 to $193 per sq ft; Everything above divided by water surface area, which is how builders compare bids
Yearly upkeep: $1,200 to $2,400; Chemicals, power and water in 2026, plus $400 to $800 for opening and closing where winters freeze. Fiberglass has no liner or plaster cycle, which is where its ten-year cost lands under the others

Pool Cost formula

Shell and install = Length x Width x rate per sq ft x finish factor
Rates per sq ft of water: vinyl $75 to $125, fiberglass $95 to $160, concrete $125 to $220
Extras = Deck sq ft x $10 to $18 + Fence ft x $25 to $50 + heater + salt or cover
Total = Shell and install + Extras

Worked example

A 14 x 28 ft vinyl liner pool, builder basic: 14 x 28 = 392 sq ft of water. At $75 to $125 per sq ft and a 0.9 basic factor, the shell and installation run about $26,500 to $44,100.

Add 450 sq ft of concrete deck at $10 to $18 per sq ft ($4,500 to $8,100), 100 ft of aluminum barrier fence at $25 to $50 per ft ($2,500 to $5,000) and a gas heater ($3,500 to $6,500). The budget lands at about $37,000 to $63,700, or $94 to $163 per square foot of water surface.

Quick reference

Typical 2026 installed cost by pool type and size (shell and installation only)
Pool size	Water surface	Vinyl liner	Fiberglass	Concrete
12 x 24 ft	288 sq ft	$21,600 to $36,000	$27,400 to $46,100	$36,000 to $63,400
14 x 28 ft	392 sq ft	$29,400 to $49,000	$37,200 to $62,700	$49,000 to $86,200
16 x 32 ft	512 sq ft	$38,400 to $64,000	$48,600 to $81,900	$64,000 to $112,600
18 x 36 ft	648 sq ft	$48,600 to $81,000	$61,600 to $103,700	$81,000 to $142,600
20 x 40 ft	800 sq ft	$60,000 to $100,000	$76,000 to $128,000	$100,000 to $176,000

What actually drives the price

The shell is only the starting point. Excavation is where budgets break: rock, running sand, clay that heaves or a water table close to the surface turns a two-day dig into a week with a dewatering pump, and it is always a change order. Ask the builder to pay for a soil bore before the contract, or write an allowance for rock into it. Access matters just as much, because an excavator needs about 10 ft of clear width, a fiberglass shell needs a crane day at typically $1,500 to $3,000 when it cannot be trailered in, and a backyard reached only through a 36 in gate gets dug by mini-excavator at double the hours.

Then come the parts that never appear in the headline number: the deck at $10 to $18 per sq ft, the barrier at $25 to $50 per ft, the permit and any engineering the town requires, a gas line sized for a 250,000 to 400,000 BTU heater, and the electrical work under NEC 680, including the bonding grid that has to be in the ground before the deck pours. Landscape repair, irrigation reroutes and a drainage plan for the runoff the new deck creates round it out. Budget 15 to 20 percent above the contract for the yard around the pool.

Vinyl, fiberglass and concrete over ten years

Vinyl liner is the lowest entry price and the most predictable install, and the liner is a scheduled cost every 8 to 12 years at typically $4,500 to $7,500. Fiberglass quotes look higher on day one because the shell arrives finished, but there is no liner cycle and no plaster cycle, the smooth gelcoat holds less algae, and salt does not bother it, so the ten-year total often lands under vinyl. The trade-off is shape and size: the shell has to fit on a truck, so about 16 x 40 ft is the ceiling and the steps are where the mold put them.

Concrete, sprayed as gunite or shotcrete over steel, buys any shape, any depth, a real tanning ledge and a spa that spills over. It also carries the highest price per square foot, the longest build (typically 8 to 14 weeks against 3 to 6 for fiberglass), and a resurfacing cycle every 10 to 15 years at typically $6,000 to $15,000. Plaster is also the surface most sensitive to water balance, which is why concrete owners learn the saturation index. Whatever the type, sign in fall if you can: spring contracts run 5 to 10 percent higher and start later.

What this calculator leaves out

The permit and any engineered plans, spoil haul-off (a 16 x 32 pool digs out 130 to 180 cubic yards), the gas line and meter upgrade for a heater, the sub-panel and bonding work, water to fill it at typically $5 to $10 per 1,000 gallons or $300 to $600 for a tanker, landscaping and irrigation repair, and the drainage the new deck forces. Also automatic cleaners, handrails, diving board footings and the property tax and insurance increases a pool brings.

Code limits that apply

ISPSC 305.2 / IRC AG105checked
Barrier at least 48 in above grade on the outside, with no more than 2 in of clearance under it
If you miss it: A 42 in fence reused from the yard fails the final inspection and the pool cannot be filled or used
ISPSC 305.2 openings
No opening in the barrier passes a 4 in sphere; horizontal members under 45 in apart go on the pool side
If you miss it: Ranch-rail or wide-picket fence gives a toddler a ladder; the inspector measures with a sphere gauge
ISPSC 305.3 gates
Gates open outward away from the pool, self-closing and self-latching, latch release 54 in above grade
If you miss it: A standard yard gate latch at 36 in fails; retrofitting a hinge and magnetic latch costs more than buying it right
ISPSC 305.4
Where a dwelling wall is part of the barrier, doors need an alarm sounding within 7 seconds for 30 seconds, or a powered safety cover
If you miss it: The slider from the kitchen to the pool deck is the most common failure at final inspection
NEC 680.26
Equipotential bonding grid, 8 AWG solid copper, tying shell steel, ladders, the perimeter surface within 3 ft and all equipment
If you miss it: Missing bond means tingling in the water and a real shock hazard; the fix is breaking out the deck
NEC 680.22
Receptacles 6 to 20 ft from the pool wall and GFCI protected; no overhead service conductors within 22.5 ft of the water
If you miss it: A pump plugged into an existing outlet too close to the water gets red-tagged on the electrical inspection
IRC AG105.5 / ASTM F1346
A powered safety cover used in place of part of the barrier has to meet ASTM F1346
If you miss it: A winter tarp on water bags is not a safety cover and does not satisfy the barrier requirement

Provision	Limit	If you miss it
ISPSC 305.2 / IRC AG105checked	Barrier at least 48 in above grade on the outside, with no more than 2 in of clearance under it	A 42 in fence reused from the yard fails the final inspection and the pool cannot be filled or used
ISPSC 305.2 openings	No opening in the barrier passes a 4 in sphere; horizontal members under 45 in apart go on the pool side	Ranch-rail or wide-picket fence gives a toddler a ladder; the inspector measures with a sphere gauge
ISPSC 305.3 gates	Gates open outward away from the pool, self-closing and self-latching, latch release 54 in above grade	A standard yard gate latch at 36 in fails; retrofitting a hinge and magnetic latch costs more than buying it right
ISPSC 305.4	Where a dwelling wall is part of the barrier, doors need an alarm sounding within 7 seconds for 30 seconds, or a powered safety cover	The slider from the kitchen to the pool deck is the most common failure at final inspection
NEC 680.26	Equipotential bonding grid, 8 AWG solid copper, tying shell steel, ladders, the perimeter surface within 3 ft and all equipment	Missing bond means tingling in the water and a real shock hazard; the fix is breaking out the deck
NEC 680.22	Receptacles 6 to 20 ft from the pool wall and GFCI protected; no overhead service conductors within 22.5 ft of the water	A pump plugged into an existing outlet too close to the water gets red-tagged on the electrical inspection
IRC AG105.5 / ASTM F1346	A powered safety cover used in place of part of the barrier has to meet ASTM F1346	A winter tarp on water bags is not a safety cover and does not satisfy the barrier requirement

Rows marked checked produce a warning in the results when an entry crosses the limit. The others are on the plans or on site and this calculator does not test them. Local amendments can be stricter; the adopted edition and the inspector govern.

Mistakes that cost money

Signing before a soil test: rock, clay heave or a high water table adds typically $5,000 to $20,000 in excavation and dewatering, always as a change order.
No access lane: an excavator needs about 10 ft of clear width, and taking out a fence section and restoring the yard is billed on top.
Reading a quote that stops at the coping: the deck is usually a separate line and is the single largest add on most jobs.
Skipping the equipotential bonding grid before the deck pours: NEC 680.26 work added later means breaking up finished concrete.
Treating the barrier as optional: the permit does not close without a 48 in barrier and self-latching gates, and homeowners insurance asks too.
Buying in April: spring contracts carry peak prices and the longest lead times; fall signing typically saves 5 to 10 percent and books the dig.

Key facts

Typical 2026 installed prices per sq ft of water surface: vinyl liner $75 to $125, fiberglass $95 to $160, concrete $125 to $220.
A barrier at least 48 in high with self-closing, self-latching gates is required around a residential pool under ISPSC 305 and IRC Appendix AG.
NEC 680.26 requires an equipotential bonding grid of 8 AWG solid copper tying the shell, ladders, deck and equipment together.
Pool decking typically costs $10 to $18 per sq ft installed in 2026, and a 4 ft walk-around on a 16 x 32 pool is 500 to 700 sq ft.
A vinyl liner is replaced every 8 to 12 years, typically $4,500 to $7,500, and plaster is resurfaced every 10 to 15 years.

Frequently asked questions

How much does an inground pool cost in 2026?

For the shell and installation, typically $75 to $125 per square foot of water surface for vinyl liner, $95 to $160 for fiberglass and $125 to $220 for concrete. A 16 x 32 ft pool with decking and a code barrier usually lands between $50,000 and $110,000 all in.

Is a fiberglass pool cheaper than concrete?

Yes on both the install and the decade after. Fiberglass runs about $95 to $160 per square foot of water against $125 to $220 for concrete, and it skips the plaster resurfacing that concrete needs every 10 to 15 years. The trade-off is that shell sizes stop near 16 x 40 ft.

Do I have to fence a pool?

Yes. ISPSC 305 and IRC Appendix AG require a barrier at least 48 in high with gates that are self-closing and self-latching, with the latch 54 in up. If the house wall forms part of the barrier, the doors to the pool need alarms or a powered safety cover meeting ASTM F1346.

What does a pool cost to run each year?

Typically $1,200 to $2,400 a year in 2026 for chemicals, power and water, plus $400 to $800 for opening and closing in freezing climates. A variable-speed pump run on low and a cover cut the power and water sides of that the most.

Sources and references

Chapter 3 General Compliance, Section 305 Barriers, 2021 ISPSC (ICC)
Appendix AG Swimming Pools, Spas and Hot Tubs, 2021 IRC (ICC)
Safety Barrier Guidelines for Residential Pools (Pub. 362) (U.S. Consumer Product Safety Commission)
NFPA 70, National Electrical Code (Article 680, pools and fountains) (NFPA)

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