Buying a used shipping container looks simple on paper: pick a size, agree a price, wait for delivery. In practice, that’s exactly where most buyers slip up. Skipping the inspection, guessing on size, ignoring what delivery actually requires, and not asking the supplier the right questions upfront are the four mistakes that cause almost every regret purchase. Get those right and the process is genuinely straightforward.
Get them wrong, and it usually means rust repairs, a container that doesn’t fit the site, or a delivery truck that can’t reach the driveway. This guide walks through the mistakes buyers make most often, and how to avoid them.
Get them wrong, and it usually means rust repairs, a container that doesn’t fit the site, or a delivery truck that can’t reach the driveway. This guide walks through the mistakes buyers make most often, and how to avoid them.
Key Takeaways:
- Rust isn't always a dealbreaker. Surface rust is cosmetic; rust on cross members or the floor frame is structural.
- Size mistakes are the most common error among first-time buyers. Measure the site and storage needs before ordering.
- Condition grades (wind & watertight, cargo-worthy, IICL) affect both container prices and what the unit is fit for.
- Ask about CSC certification, shipping history, and what recourse exists if a problem shows up after delivery.
- Delivery and access requirements are often an afterthought. They shouldn't be.
Skipping the Container Inspection
This is the big one. A rushed or non-existent inspection causes more costly mistakes than anything else on this list.
Rust is the obvious concern, but not all rust is equal. Surface rust on side panels is cosmetic and expected on a used container. It’s a sign the box has done its job. What actually matters is whether the cross members, corner castings, and floor structure are still structurally sound. A proper container inspection should cover:
Rust is the obvious concern, but not all rust is equal. Surface rust on side panels is cosmetic and expected on a used container. It’s a sign the box has done its job. What actually matters is whether the cross members, corner castings, and floor structure are still structurally sound. A proper container inspection should cover:
- Walk the entire container, inside and out, not just a glance through the doors
- Check for soft spots in the floor, especially near the doors where moisture collects
- Look for rust or damage around the cross members, since these hold the structural integrity of the unit
- Check that it will seal properly: door gaskets and welded seams shouldn’t show gaps or corrosion
- Ask if the container comes with a wind and watertight guarantee, in writing
If a supplier won’t let a buyer inspect a container beforehand, or won’t send detailed photos of the floor and corner posts, take that as a warning sign. A reputable supplier has nothing to hide here.
Choosing the Wrong Container Size
Buying the wrong size is probably the second most common mistake. First-time buyers underestimate how much space they’ll need, then order a 20ft container when a 40ft container would have saved a second purchase later on.
Think about what’s being stored, not just what fits the driveway today. A 20ft container suits tools, stock, or seasonal storage. A 40ft suits larger equipment, bulk inventory, or anyone converting the space into a workshop.
Storage requirements change. If there’s a decent chance yours will grow over the next year or two, buying the right size once usually works out cheaper than buying twice.
Not Understanding Condition Grades
Used” isn’t one category. Condition grades vary, and they affect both container prices and suitability.
Broadly, used containers fall into a few grades:
- Wind and watertight (WWT). Structurally sound and sealed against the elements, though it may carry cosmetic wear like dents or surface rust. Good for general storage.
- Cargo-worthy / Grade A. A step up, meeting the standard required for international shipping.
- IICL certified. The highest used grade, inspected against strict industry standards and often close to one-trip quality.
- One-trip. Technically new. Made a single journey from the factory, so it performs like a brand-new container at a lower price than true new stock.
Buying without knowing the grade is how buyers end up paying cargo-worthy prices for a storage-grade box, or the other way round. Ask the supplier to specify the grade in writing, not just describe the container as “good condition.”
Also learn about the average lifespan of containers in this blog.
Buying Without Asking the Right Questions
A shipping container purchase isn’t just about the box. It’s about the supplier behind it.
Worth asking before committing:
- Is the container CSC certified? This matters for anyone planning to export it or move it by rail or ship later.
- What shipping lines has it come from, and how many trips has it made?
- What recourse exists if the container arrives damaged or doesn’t match the description?
- Does the price include delivery, or does that get added on afterward?
First-time buyers often treat the purchase as a simple transaction, then discover there’s no recourse once the container’s sitting on their land. A supplier who answers these questions clearly is usually worth buying from.
Ignoring Delivery and Access Requirements
Delivery is where otherwise smooth purchases run into trouble, mostly because access requirements get treated as an afterthought.
A loaded delivery truck needs real room to maneuver. Before the container arrives, check:
- Is the driveway wide enough for a tilt-bed delivery truck, not just a standard van?
- Are there overhead power lines or low branches along the delivery route?
- Has the ground been prepared? A container needs a level, load-bearing surface such as compacted hardcore, concrete, or railroad ties, so it doesn’t sink or twist over time.
- Will the site need frequent access afterward, and is there room to open the doors fully if so?
- Does the municipality have permit requirements for placing a container on the property, even temporarily?
Skip this and there’s a real risk the delivery truck simply can’t reach the drop point, which usually means a rescheduled delivery and a cost nobody planned for.
Frequently Asked Questions
What should I look for when buying a used shipping container?
Check for structural rust around the cross members and floor, confirm the door seals close properly, and ask for the condition grade in writing. Surface rust is normal wear and not a reason to walk away.
How much does a second-hand shipping container cost?
It depends on size and grade. A used 20ft container in the UK typically starts from around £1,500 + VAT, while a used 40ft starts from roughly £1,800 + VAT, rising with higher condition grades like cargo-worthy or IICL.
Are used 20ft containers worth buying?
Yes, for most storage and site applications. A 20ft container offers a solid balance of space and cost, provided it’s inspected properly and matched to what’s actually being stored.
What are the hidden costs of buying a used container?
Delivery, ground preparation, and any permit requirements from the local municipality are the ones buyers tend to forget about. Always check whether the quoted price includes delivery.
How do I check the structural integrity of a used container?
Focus on the cross members, corner castings, and floor. These carry the load-bearing weight of the container. Surface rust on the side panels is cosmetic; rust or soft spots in these structural areas is not.
