Shipping Container
Pool Guide

Shipping container pools have gone from a novelty to a mainstream alternative to traditional fiberglass and concrete pools — and for good reason. A 20-foot container gives you a 20×8ft plunge pool or lap pool at a fraction of the cost of a custom concrete build. They can be installed above ground, partially buried, or fully in-ground, and the steel structure means they hold water exceptionally well when properly sealed and lined.

How much does a shipping container pool cost?

Total cost depends on whether you go DIY, use a pool kit, or hire a contractor, and whether you install above ground or in-ground. Here's a realistic breakdown across all three approaches.

Above ground vs in-ground

This is the biggest decision you'll make and it affects cost, permits, and aesthetics significantly.

DIY, pool kit, or contractor?

For most people, a pool kit is the right balance. The main reason DIY container pools fail is waterproofing — sealing a steel container well enough to hold water long-term without leaks, corrosion, or liner failure requires specific products and technique. Kits from reputable suppliers come with the waterproofing already done.

How container pools work

A shipping container is a steel box — watertight from the outside by design. The pool conversion process turns it watertight on the inside and fits it with pool equipment. There are two main approaches to the interior waterproofing:

Beyond waterproofing, every container pool needs the same equipment as a traditional pool: a pump, filter, and usually a heater. Container pools hold roughly 8,000–15,000 gallons depending on size — smaller than a standard pool, which means equipment can be smaller and cheaper. A basic pump and sand filter for a 20ft container pool runs $800–$1,500.

Installation process

• 1

  Site preparation

  Level the installation area and prepare the base. For above-ground pools: a concrete pad (at least 4 inches thick) or compacted gravel base. For in-ground: excavation to container depth plus 12 inches on all sides for concrete surround and drainage gravel. Get any required permits before breaking ground.

• 2

  Container delivery and placement

  The container is delivered by tilt-bed truck and positioned on your prepared base using the truck's hydraulics or a crane (required for in-ground placement). This is a one-day process. Make sure site access is clear — a tilt-bed truck needs roughly 60 feet of clear space to operate.

• 3

  Cutting and modifications

  Entry steps, a skimmer opening, return jets, and drain ports need to be cut into the container walls. For pools with windows (a popular option), the window openings are cut and framed at this stage. All cut edges must be ground smooth and treated for corrosion before any waterproofing is applied.

• 4

  Waterproofing

  The interior is cleaned, primed, and waterproofed with either a vinyl liner or epoxy coating. This is the most critical step. For epoxy coating: surface prep (sandblasting or grinding) is as important as the coating itself. For liner installation: the liner must be fitted and seamed correctly with no tension points that could cause tearing.

• 5

  Equipment installation

  Pump, filter, and heater are installed — typically on a small equipment pad beside the pool. Pool plumbing runs from the skimmer and drain through the container wall to the equipment, then back through a return jet. Electrical connection for the pump and heater requires a licensed electrician and a GFCI-protected circuit.

• 6

  Decking and finishing

  Decking transforms the pool from an industrial-looking steel box into a finished backyard feature. Timber decking framed around the container at the top edge is the most common approach. Add entry steps, handrails, and outdoor lighting to complete the install. This stage is where most of the budget variation happens — from simple to elaborate.

Container pool vs traditional pool

The container pool's biggest limitation is width. At 8 feet wide, it's a lap pool or plunge pool — not a family pool where kids play. If you want a pool wide enough to swim laps comfortably side by side, you need two containers joined together (complex and expensive) or a traditional pool.

Frequently asked questions

Do I need a permit for a container pool?

Almost certainly yes for an in-ground pool, and often yes for above-ground depending on your jurisdiction. Most local codes treat any pool over 24 inches deep as requiring a permit. Contact your local building department before starting — requirements vary significantly by state and county. Some HOAs also prohibit non-traditional pools entirely.

Are shipping container pools safe?

Yes, when properly built. The main safety considerations are the same as any pool: fencing (most jurisdictions require it), GFCI-protected electrical equipment, and proper chemical management. The steel structure itself is extremely durable — a properly waterproofed container will hold water longer than a typical vinyl above-ground pool.

How long does a container pool last?

The container structure itself will last 25–30+ years with proper corrosion management. The liner (if used) typically needs replacing every 7–10 years. Epoxy coatings need recoating every 5–8 years. Pool equipment (pump, filter) has a 10–15 year lifespan. Total maintenance cost is similar to a comparable above-ground pool.

Can a container pool be heated?

Yes. Because container pools hold significantly less water than a standard pool (8,000–15,000 gallons vs 15,000–30,000 gallons for a standard pool), they're actually cheaper to heat. A heat pump or gas heater sized for a small pool will maintain temperature efficiently. The steel walls lose heat faster than insulated fiberglass, so adding foam board insulation to the exterior is worth considering in cold climates.

Will a shipping container float?

An empty, sealed shipping container will float — steel is less dense than water when the interior is air-filled. However, once filled with water for use as a pool, a 20ft container holds roughly 12,000 gallons — about 100,000 lbs — which pins it firmly in place. Buoyancy is only a concern during initial placement on a flooded site, not in normal use.

What size container makes the best pool?

A 20-foot container gives you a 20×8ft pool — good for lap swimming and plunge use. A 40-foot container gives you a proper lap pool at 40×8ft, but costs significantly more to convert and requires a much larger site. For most residential backyards, a 20ft container is the practical choice. A 10ft container is better suited as a hot tub or cold plunge.