15x30 inground pool

15x30 inground pool: size, cost and what it looks like

A 15x30 inground pool is 450 square feet of water with 90 feet of edge, and holds about 15,100 gallons at a 4.5 foot average depth. It is the middle of the family range, 3.8 fence panels long. The pool alone runs $40,000 to $115,000 at national planning rates.

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Last updated October 10, 2026

AI concept image: a rectangular pool in front of a white two-story house, with a sun shelf, a raised spa, a pergola and an iron fence

AI concept image: a rectangular pool beside a hot tub, with steps at the far end, a lounge area and a coastal view

AI concept images, not photos of a built pool.

Water surface: 450 sq ft
Edge: 90 ft
Gallons at 4.5 ft: 15,100
Fence panels long: 3.8
The pool alone, planning: $41,000 to $113,000

A 15x30 next to its neighbours, at the same scale

The shaded outline is the 15x30. The others are the sizes either side of it, drawn from the same corner, so you can see what one step adds.

Outlines, smallest to largest: 14x28, 15x30, 16x32. Every outline starts at the same corner and is drawn to scale. The ticks on the top and left edges are 8 ft fence panels.

A 15x30 sits in the middle of the family range, and nothing in it feels cramped

Fifteen by thirty is the round-number family pool: 3.8 fence panels long and 1.9 wide. There is room to swim a length, a shallow ledge, and an end where kids can stand and play.

Both pictures are AI concept images of a pool in the 15x30 range, not measured drawings. One puts the pool in front of a white two-story house with a spa and a sun shelf; the other beside a hot tub on a deck with an ocean view. For true proportions use the scale plan on this page: thirty feet is long, and with deck on all sides it takes real yard.

A 15x30 is 58 square feet bigger than a 14x28

Step up from the 14x28 and you add 58 square feet of water and 1,900 gallons. That buys another few feet of swim and space for a spa or a sun shelf alongside. Step up again to a 16x32 and the gain is similar, so the 15x30 is a sensible place to stop for most yards.

The yard sets the limit. One pool maker suggests keeping a pool to no more than about a quarter of the yard, which puts a 15x30 in a yard of about 1,800 square feet, before the deck and the fence. Mark the outline on the lawn before you commit.

Depth is the other half of the decision. Size guides give a shallow end of three to four feet and a deep end of five to six, so a 4.5 foot average is the fair middle, and a pool with a long shallow shelf holds fewer gallons than the figure above while one that is deep all the way holds more. Ask the builder for the depth profile, not only the outline.

If you are comparing it with a 12x24, the comparison page draws both outlines to one scale.

Two quotes for the same 15x30 can differ a lot, and what is included explains most of it

Two quotes for the same size can differ by the spa, the finish and the deck, so a 15x30 with a spa, a pebble finish and a salt-finish deck is a different job from a plain one.

The table prices the pool alone, then each extra line, so you can see which lines your quote includes and which it leaves for you to buy later. Features such as a spa or a vanishing edge move the total a lot, and the cost page lists what pushes the price up.

Planning cost lines for a 15x30 inground pool at national rates
Line	Planning range
The pool450 sq ft of water at $90 to $250 a square foot (shell, excavation, plumbing, equipment, plaster).	$41,000 to $113,000
Coping90 linear ft of water edge at $6 to $55 a foot, from plain concrete to travertine.	$500 to $5,000
A 4 ft deck border all round424 sq ft at $3 to $80 a square foot installed, from pavers to composite decking.	$1,500 to $34,000
Aluminum pool fence around that deck122 linear ft at $15 to $35 a foot installed.	$2,000 to $4,500
All of the above, if your quote includes it	$45,000 to $160,000

A planning range from published sources, not a quote. National rates; a state, a lot and the build type can move them a lot more than a few percent. Totals are rounded down and up to the nearest $5,000, so they will not match the sum of the lines. We price a 4 ft deck border; the builder size guide we cite suggests at least 6 ft clear around the pool, which adds deck and fence cost. The per-foot band is quoted for a standard pool and used here for every size. Left out: permits and engineering, land clearing, landscaping, electrical beyond the pool equipment, a heater, a cover, financing and overruns. Rates from: HomeAdvisor, in-ground pool cost, Fixr, gunite and concrete pool, Pool Research, plunge pool cost, Pool Research, pool coping cost, HomeAdvisor, travertine pavers, HomeAdvisor, pool deck cost, Fixr, pool fence.

More on size: the full inground pool size chart, what size pool do I need, and 12x24 against 15x30.

A design drawn at this size: Modern farmhouse pool with a sun shelf in Naperville, Coastal modern pool with an ocean view in Encinitas.

Pricing the whole job? Inground pool cost, line by line covers every line a 15x30 quote should carry.

See a 15x30 in your yard with the free visualizer.

Will a 15 x 30 fit your yard?

Draw your yard and the house, drop a 15 x 30 in, and see the distance to every fence. It is drawn to scale and free.

Try a 15 x 30 in my yard

Questions people ask

How many gallons is a 15x30 pool?

About 15,100 gallons at a 4.5 foot average depth. At a 4 foot average it is about 13,500 gallons, and at 5 feet about 16,800.

Is a 15x30 pool the same as a 15x30 above-ground pool?

No. A 15x30 is also a common above-ground oval size, and the two cost very differently. This page is about the inground rectangle, dug into the ground and finished with plaster, tile or a liner.

How much does a 15x30 inground pool cost?

At national planning rates, the pool alone comes to $40,000 to $115,000, and with coping, a four foot deck border and a fence the range reaches $45,000 to $160,000. The cost page breaks the lines down.

Sources and date checked

Links checked October 6, 2026. If one has moved or no longer says this, tell us (see our editorial policy) and we will fix it.

Every picture on these pages is an AI concept image, not a built pool, and its proportions are not measured. Where a size has no picture of its own we show the closest one and say so in the text. Cost ranges are planning numbers from published guides at national rates, not quotes. See how we write and check pages in our editorial policy.

This page is about inground pools. A 12x24 or a 15x30 is also a common above-ground oval, which is a different product at a different price.

Pool builder? Send a homeowner their own design as a film.

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