Con ex boxes are steel shipping containers, and the name is just another way to say conex. A used 20 ft con ex box typically costs about $1,500 to $4,000, while a used 40 ft often runs about $2,500 to $5,500, plus delivery. If you want one for storage, a workshop or a build, this guide covers where the name comes from, what sizes exist and how to buy with confidence from Queen Container.
What Are Con Ex Boxes?
The word comes from CONEX, short for the container express boxes the US military used to move supplies. Over time people started calling almost any steel intermodal container a conex, and you will see it spelled conex, connex, con-ex and con ex. They all point to the same thing: a rugged, stackable steel box with corrugated walls, a wood or steel floor and lockable doors at one end.
Modern con ex boxes follow standard ocean freight sizes, which is why they fit on trucks, trains and ships and why a delivery driver can usually place one with ease.
Common Sizes and Weights
- 10 ft: compact storage for tools and seasonal gear.
- 20 ft: about 8 ft wide and 8.5 ft tall, roughly 1,170 cubic feet, about 5,000 lb empty.
- 40 ft: roughly 2,390 cubic feet, about 8,000 lb empty.
- 40 ft high cube: 9.5 ft tall with roughly 2,700 cubic feet.
- 45 ft: extra length for bulk storage and freight.
The 20 ft size is the most popular choice for homeowners and small businesses. Our complete guide to the 20 ft shipping container covers it in depth.
What Con Ex Boxes Cost
| Type | 20 ft typical price | 40 ft typical price |
|---|---|---|
| Used | $1,500 to $4,000 | $2,500 to $5,500 |
| New or one-trip | $3,500 to $6,500 | $5,000 to $9,000 |
Those are typical market ranges, not quotes. Condition, grade, local demand and the time of year can all move the price. Delivery is usually extra and commonly costs about $2 to $6 per loaded mile, with local moves often between $150 and $500 and long hauls of $1,000 or more.
Popular Uses for a Con Ex Box
People buy these boxes for backyard storage, job-site security, farm equipment, retail pop-ups, workshops and even homes. If you want a stronger, tougher unit, look at the military grade containers category. If you need a finished space, office containers come ready for work.
Because the shell is steel, you can add windows, doors, insulation, shelving and power. Just keep in mind that modifications can affect structural strength, so have a qualified builder plan any large openings.
Where to Buy and How Delivery Works
When you shop for con ex boxes, compare grade, photos of the exact unit and the full delivered price. Cargo-worthy and wind-and-watertight grades both keep out weather, but they differ in age and condition, so ask for the grade in writing. Before delivery, prepare a level surface and make sure the truck has a clear path and enough room to turn. Check the container delivery areas page for coverage.
Next Steps
Decide on a size, set a delivered budget and request quotes. Start with a 20 ft double door container or browse every option in our shipping containers for sale. Queen Container sells new and used containers and ships nationwide, and quotes depend on size, condition and delivery location. Contact us with your location and needs.
