Tips for buying a 20ft container: what you need to know

The 20-foot shipping container is a quiet, understated workhorse with the flexibility to become almost anything. No longer just for transporting goods across the globe, the humble 20-foot container has evolved into a go-to solution for offices, storage units, cafés, and even gyms. It’s big enough to handle real weight, small enough to move without cranes, and built to last.

Still, buying one isn’t as simple as it looks online. Photos can hide dents, listings can be vague, and “like new” can mean just about anything. Here’s what you need to know.

Understand your needs

Before scrolling through suppliers, stop and ask yourself what you actually need. Storage? Shipping? A bit of both? Your intended use will shape everything, from the container’s grade and price to how much refurbishment or repainting it might need later.

If your container will be visible - perhaps on a forecourt or used as a workshop - a new or one-trip model (a container that’s only made a single journey from the manufacturer to the UK) is worth the extra cost.

For private or temporary storage, a used container often makes more sense. They’re cheaper, extremely durable, and still watertight if you choose carefully. Look for wind and watertight (WWT) grading; this label means it’ll stay dry, even through a British winter.

“Cargo-worthy” containers are a different class altogether - certified for export and structurally sound enough to ship and stack. Most buyers don’t need that level of certification, so there’s no reason to overpay for paperwork you’ll never use.

If you’re planning a conversion, such as a pop-up bar, studio or site office, consider a high cube container. It’s just a foot taller than standard, but you’ll appreciate the extra headroom once it’s kitted out.

Consider the size and capacity

Numbers matter here. A standard 20ft container measures 6.06m long, 2.44m wide and 2.59m high, offering around 33 cubic metres of usable space inside. That’s roughly ten pallets of goods, or about the contents of a small flat.

An empty 20ft container weighs around 2,000kg, and when fully loaded can carry up to 28,000kg. That’s heavy enough to handle machinery, yet light enough for a HIAB lorry to lift safely.

You can go smaller with a 10ft unit if space is tight, or larger with a 40ft giant if you’re thinking big - but the 20-footer sits in the sweet spot: practical, portable, versatile and, importantly, affordable.

Choose the right container provider

A good container supplier doesn’t just drop off a unit and drive away. They handle the finer details - delivery logistics, condition checks, and aftercare - the complete package.

Before signing anything, ask how transparent they are about stock and grading. A reputable supplier will provide genuine photos and clear information about the container’s origin and condition, including any refurbishment or repainting work.

Ask about the age, door seals, and type of flooring. A reliable company will answer these questions without hesitation. TEU is a trusted UK supplier offering premium 20ft shipping containers and is happy to answer any questions you might have before purchase.

It’s also wise to check reviews - both on their website and on independent platforms or social media. Look for recurring themes in customer feedback, both positive and negative. Pay attention to delivery times, professionalism and communication. If replies are prompt and detailed, that’s a good sign.

Key inspection points

Even the best deal can turn sour if the container itself isn’t sound. Never skip the inspection - or at least request a detailed video tour if you can’t visit in person.

Exterior: A little surface rust is fine, but deep or flaky rust will become a problem later.

Doors: Open and close them fully - they should move smoothly. If they grind or don’t align properly, the frame might be twisted. Check the rubber seals too; they should flex when pressed, not crack or crumble.

Interior: Step inside and close the doors. If you see daylight, there’s a leak somewhere. Check the plywood floor for soft spots, which indicate moisture or chemical spills. Replacement is possible, but it adds cost.

Security: Most used containers come without a lock box - a steel cover welded over the padlock to stop tampering. Without one, bolt cutters can get in easily. Ask for a welded lock box and use a quality container padlock, such as a CISA or block lock.

CSC plate: This metal certification plate should be fixed in place and legible. If it’s missing and you plan to ship the container, you’ll need a fresh inspection before it can legally travel.

Consider delivery and placement

Delivery often catches people out. Most 20ft containers arrive on a HIAB truck, which needs clear access and solid ground. If the driver can’t reach your location safely, the delivery may fail, and you’ll still be charged.

Measure your access route carefully, check for low branches or power lines, and prepare a level base before delivery. Concrete pads or timber sleepers under each corner help prevent corrosion. Poor placement is one of the main causes of twisted frames and jammed doors.

Delivery costs vary depending on distance, crane reach and offloading time. Always confirm what’s included in your quote - full positioning or just kerbside drop-off - so you know exactly what to expect. A reputable supplier like TEU will talk you through the whole process.

Final thoughts

 The 20ft shipping container has earned its reputation as the industry standard for a reason. Whether you’re storing equipment, shipping goods or building something entirely new, it strikes the perfect balance between size, strength and mobility. With the right supplier and a careful inspection, you’ll get a container that lasts for decades.