Are Container Pools Worth It? Pros, Cons, and Real Costs

Container pools are all over social media, because a sleek steel box full of clear blue water makes a great photo.

You are buying summers with your kids, not a photo.

So are they worth the money? Most articles miss the key point: a pool welded from a raw container and a factory-built pool are different products that fail in different ways.

We build pools in Tulsa, and our  inground cost guide covers what every pool type costs here. We do not build or sell container pools, so we have no unit to push on you. Here are the pros, the cons, the full cost, and a verdict.

What Is a Shipping Container Pool?

A shipping container pool starts as a steel cargo box, the same kind that rides on ships, trains, and trucks. The roof comes off, the inside gets a waterproof shell, and a pump, a filter, and a light turn the box into a pool.

How Big and Heavy Is One?

Size is easy to see, but weight isn't, and your pad has to carry it all.

Midwest Container Pools' 20-foot model measures 20 feet long, 8 feet wide, and 4 feet tall. Midwest lists it at about 4,800 gallons, but that matches the box's full outside size, so the real water line likely holds less.

Even so, a full unit weighs roughly 17 to 23 tons. Midwest's spec sheet lists about 9 tons when full, which is less than the water alone.

Empty, the box is far lighter. In a This Old House video, a Trek rep put an 8-by-20-foot unit at about 7,500 pounds before filling.

Bigger boxes weigh far more, since a 40-foot DIY box filled about 7 feet deep holds roughly 16,000 gallons. That is about 66 tons of water before you add the steel.

DIY vs. Prefab: Two Different Products

A DIY container pool starts with a used container that you buy yourself. You or a welder cut off the roof, patch the steel, add a liner or a coating, and plumb the whole thing. The box was never designed to hold water, and only you check the work.

A used box also comes with a history you cannot see. The  IPPC container guide notes that plywood container floors are treated with insecticide to keep pests out. Some boxes have also hauled chemicals, so a DIY builder rarely knows what the steel has touched.

DIY looks cheap on paper. HomeGuide puts a used container at about $2,000 to $7,000 or more. Midwest's cost page, a seller's own figure, lists DIY kits at $15,000 to $25,000. Neither number covers bracing, plumbing, electrical, a crane, or a warranty.

A prefab container pool comes from a company that turns new containers into pools in a shop. The company lines the inside, adds the equipment, and gives a written warranty. All three makers we checked buy new boxes or "one-trip" boxes that have crossed the ocean only once. Two of them line the box with a one-piece fiberglass shell. The third, Trek Pools, instead coats the steel inside.

The Pros of a Shipping Container Pool

A container pool does some things very well.

It Arrives Built

A prefab unit is built in a shop, and Midwest says a crane can set one in place in about one to two hours.

It Needs Little or No Digging

An above-ground unit sits on a gravel bed or a concrete pad instead of in a hole, so your lawn takes far less damage.

It Looks Modern

Steel lines and a clean wood deck give a container pool a sharp, modern look.

It Fits Small Yards

Most units are 8 feet wide, so one can fit a narrow side yard, a small city lot, or a spot beside the deck. Trek also builds 12-foot-wide models for more play space. Leave room for the equipment, though. The Trek install in that video needed about 4 extra feet at one end so the equipment doors could open.

It Makes a Long Lap Lane

A 40-foot unit gives you a straight lap lane, and Midwest lists one at $68,790 before setup.

It Can Move With You

An above-ground unit can, in theory, move with you, but moving it requires a crane or lift truck, a flatbed, and a new pad.

Some Models Hold Heat Well

Better prefab units place foam between the steel box and the inner shell. Midwest claims it keeps heat in on cool evenings, though it cites no test. Not every unit has foam, so ask. Trek's pricing page, for one, suggests adding wall insulation.

The Cons of a Shipping Container Pool

Each heading below says whether a problem mainly hits DIY builds, prefab units, or both.

Thin Steel Walls Can Bow and Leak (Mostly DIY)

A shipping container is strong in only one direction. Its corner posts carry the weight of stacked boxes, while the walls are thin corrugated steel.

A  container engineering article in STRUCTURE magazine lists 14-gauge steel for the walls and roof. In the project it describes, engineers added reinforcement around each opening cut into the steel. Taking off the roof is the biggest cut of all.

Water 4 feet deep pushes about 10,000 pounds against one 20-foot wall. Without bracing, the walls can bow out, crack the coating, and open leaks at each cut.

Prefab units with a one-piece fiberglass shell avoid most of this. Trek says its coated units are built to withstand water pressure. In the video, its crew welds a thick steel cap along the top of the cut walls, but it shows no other bracing.

Rust Starts Where the Coating Fails (Both)

Once pool water reaches bare steel, rust begins and keeps spreading. Some sellers claim their pools will never rust because of a special coating, but a coating only protects the steel while it stays whole.

Chlorine levels matter too, and Pool and Spa News covered  corrosion research from 1982 that blamed high chlorine more than salt. An employee of a salt-system maker wrote that study, so weigh it with that in mind. Above the water, daily splash can also wear through the outside paint at the top edge and corners.

On a used DIY box, rust may be there on day one. On a prefab unit with a fiberglass shell, the shell keeps pool water off the steel. On a coated interior like Trek's, only the coating separates the water from the steel. Trek sandblasts the steel, primes it, and applies a flexible topcoat in several layers. It doesn't say how often that coat needs to be redone. Either way, the outside paint still needs regular care. Trek says it uses a marine-grade outside finish from Sherwin-Williams.

A Steel Box Sits in the Oklahoma Sun (Both)

The National Weather Service in Tulsa lists an average of 10.8 days a year at 100 degrees or more. Its  Tulsa heat records show 65 such days back in 1936.

An above-ground box has no cool earth around it, and a few thousand gallons warms up fast. Plan for water that may feel like a warm bath in late July unless you pay extra for a unit that can chill it.

One Depth and Few Ways Out (Both)

The 20-foot units we checked are 4 feet tall on the outside, and the water line sits a bit lower. That works for cooling off and floating, but it is too shallow for diving and too narrow for much play. Custom units can go deeper. The custom Trek pool in the video, with spa jets and a window, had walls cut about 5.5 feet tall.

Midwest's 20-foot model shows built-in steps, and its 40-foot pool adds a tanning ledge. Without features like these, a box gives you one depth from end to end, with no shallow end where small kids can stand. Getting out may then mean a ladder at one end.

DIY builds add another risk: cutting off the roof leaves raw steel edges that must be capped or rolled smooth before anyone swims.

Crane, Pad, and Digging Add Up (Both)

A container pool arrives in one piece, so a machine must lift it into your yard. The Trek rep in the video said a large telescoping forklift usually does the job. That install needed a crane, because the pool had to go over the house. A crane needs a clear swing over your house, fence, and trees, and overhead power lines can rule out a lift. A full 20-foot unit also needs a level gravel bed or concrete pad to carry roughly 17 to 23 tons.

Burying one adds more, and Midwest's  add-on costs page lists excavation for an in-ground setup at $2,000 to $8,000. Trek says its units can sit partly in the ground or against a retaining wall. Soil also pushes in on buried walls, so ask the maker in writing whether its walls are rated for soil and groundwater.

What Does a Shipping Container Pool Really Cost?

ReadyPool lists its 20-foot unit at $36,995 on its  ReadyPool package page, with a lifetime structural warranty. Midwest lists its 20-foot pool at $ 46,440 and its 40-foot pool at $68,790, with a 5-year structural warranty.

Trek Pools, based in Indiana, lists its 8-by-20-foot unit starting in the mid $40,000s with premium equipment on its  Trek pricing page. Its 12-by-40-foot unit starts in the mid $80,000s. Trek covers the pool itself for 1 year against defects, and a local installer handles design, permits, and setup. These are national list prices, not Silverado Rock quotes.

Midwest's cost page lists these add-on ranges for an above-ground setup.

Add those to each list price for the full cost.

Even these totals leave out outside stairs or a landing and any digging. They also skip a heater, which Midwest offers for $3,154 to $4,656.

A real install can need far more site work. The Trek pool in the video sat on steel piers driven at each corner, with concrete footers poured on top. The crew also built a retaining wall, spread drainage gravel, added a dry well, and trenched for power and a gas line to the heater. Ask each seller for a written list of what is in and out.

For an outside check, HomeGuide's national container pool costs guide puts most installed container pools at $35,000 to $65,000. That is a national benchmark, not a Silverado Rock quote.

Not sure which pool fits your family?Find My Perfect PoolAbout 90 seconds. No measurements or photos needed.

Container Pool vs. a Fiberglass Pool

Two of the three makers we checked put a fiberglass shell inside their 20-foot boxes. So for most prefab units, the real gap between a container pool and an inground fiberglass pool is what holds that shell in place.

In a container pool, a steel box carries the full push of the water. In a fiberglass pool, the earth does the job. We set every Leisure shell on at least 4 inches of 3/8 chip stone and pack the same stone around it.

Show Image

At $40,000 to $61,000 set up, a 20-foot container costs about the same as our  fiberglass pools . Those start at $45,000 installed, with waterline tile and Jandy equipment. Our  OK Plunge package is a semi-inground vinyl liner pool that starts at $19,999 for the pool only.

These prices are not the same kind of number. Our starting prices leave out permit fees, dirt hauling, and a panel upgrade. Our  finished backyard price guide shows how to turn any starting price into a real total, and our  fiberglass pool prices guide covers every size.

Do You Need a Permit for a Container Pool in Tulsa?

Yes, in almost every case. The City of Tulsa exempts only prefab pools less than 2 feet deep. Tulsa's permit guide requires a site plan, a wall cross-section, and a drainage plan.

Every pool also needs a barrier, and the federal Pool Safely  barrier checklist calls for a fence at least 4 feet tall. The national pool code lets an above-ground pool wall serve as that barrier if it stands 48 inches above grade all around. The maker must allow it, and the steps must lock or come off. A 4-foot container sits right at that line, so confirm with your city first.

Who Should Buy a Container Pool?

A prefab container pool fits best if most of these are true:

• You want a modern, industrial look above all else.
• Your yard is small, narrow, or hard to dig.
• You mostly want to cool off and float.

It is a weak fit if most of these are true:

• You want room for kids and friends to play together.
• You want cool water in August without paying to chill it.
• You were planning to weld one together yourself.

Questions to Ask Any Container Pool Seller

1. Is the container new or used, and how many trips has it made?
2. How are the walls braced after the roof comes off?
3. What is inside the box: a one-piece shell, a coating, or a liner? If it is a coating, how often does it need to be redone?
4. What paint or coating protects the outside steel, and how often does it need work?
5. What does the structural warranty cover, and for how long?
6. Does the price include delivery, crane service, or setup?
7. Is the unit rated for in-ground installation, and how does it handle soil and groundwater?
8. Is there a step, a bench, or a shallow area, and how do swimmers get out?
9. Who services the pool in my town if something breaks?
10. Do you fill and test the pool before it ships?

What I Recommend

I've been building pools for 29 years, and I've never built or serviced a container pool. So take this as an outside view from someone who knows what water does to a structure.

Two things worry me about container pools. The first is weight. Lifting one over a house is a big job, and once it's full, the pad has to carry 17 to 23 tons. The second is rust. Steel and pool water don't get along, and I'd want to know who fixes the outside steel ten years from now.

If you love the look and you buy a prefab unit with a strong warranty, a container pool can work for your family. I'd never build one from a raw container myself, because those walls weren't made to hold water.

If you're mostly after a small, affordable pool, I'd start with an in-ground plunge pool. The ground keeps the water cooler, and you get more depth for your money.

Frequently Asked Questions

Are container pools worth it?

A DIY container pool is rarely worth it because the walls weren't built to hold water. A prefab unit can be worth it for a modern look in a small yard. Once set up, though, it costs about as much as a small inground pool.

How much does a shipping container pool cost?

List prices for prefab units run from $36,995 to $46,440 for a 20-foot pool. A 40-foot pool runs from about $68,790 to the mid $80,000s. Setup adds about $3,400 to $14,300 more, plus a heater and outside stairs.

Is a container pool cheaper than a fiberglass pool?

Not by much once both are set up. A 20-foot prefab container pool often runs $40,000 to $61,000, and our fiberglass plunge pools start at $45,000 installed.

Is a DIY container pool cheaper?

Up front, yes. A used container runs about $2,000 to $7,000 or more, and DIY kits run $15,000 to $25,000. You still pay for bracing, plumbing, electrical, a crane, and site work, and no warranty covers the result.

Do shipping container pools rust?

They can, because rust starts anywhere water reaches bare steel. A one-piece fiberglass shell protects the inside, while a coated interior relies only on the coating. Either way, the outside paint still needs care.

How long do shipping container pools last?

There is little long-term data on prefab container pools yet. Their lifespan depends on how well the coating protects the steel, and warranties range from 1 year to lifetime, depending on the maker. For comparison, a fiberglass shell set on a solid base should last 50 years or more.

How much does a full container pool weigh?

A 20-foot prefab unit weighs roughly 17 to 23 tons when full. A 40-foot DIY box filled about 7 feet deep holds roughly 66 tons of water alone. Some seller spec sheets list far less.

Are container pools safe for kids?

Some units have built-in steps, but many have one depth from end to end with no shallow end, so small kids need close watching. Every pool needs a barrier at least 4 feet tall, and DIY builds must cap cut steel edges.

Can you put a container pool in the ground?

Yes, but digging alone can add $2,000 to $8,000. Ask the maker in writing whether the walls are rated for soil and groundwater.

Find the Pool That Fits Your Family

The best pool is the one your kids beg to jump into every summer night, not the one that looked best in a photo.

Our Find My Perfect Pool quiz matches your family with the pool type, size, and features that fit your yard. Take our  perfect pool quiz to see which pool fits you best.

Not sure which pool fits your family?Find My Perfect PoolAbout 90 seconds. No measurements or photos needed.