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Conex Box in North Carolina: A Complete Guide for North Carolina Buyers
Conex box, shipping container, storage container: the words get used interchangeably. What changes from one North Carolina order to the next is the size, the grade and the delivery route.
The word conex (sometimes spelled CONEX) is short for "container express," a term coined by the United States military in the 1950s for a standardized steel shipping container used to move equipment and supplies during the Korean War. The original CONEX boxes were 8.5 feet by 6 feet by 6.8 feet, much smaller than today's intermodal units, but the principle was identical: a stackable, lockable, weatherproof steel box that could move by truck, rail, or ship without unpacking.
By the late 1960s the commercial shipping industry had standardized on 20-foot and 40-foot intermodal containers, the units you see on every cargo ship and rail line today. The military term stuck in everyday speech. Many people still call any large steel storage box a conex, even when the unit is technically an ISO shipping container or a purpose-built storage container.
Whichever name is used, the container is a corrugated steel box, 20 or 40 feet long, with cargo doors on one end.
Conex Box vs Shipping Container vs Storage Container
The vocabulary lines up like this:
Conex box. Originally a military-spec container. In modern use, a colloquial name for any steel shipping container used for storage. Most commonly applied to 20-foot and 40-foot units in residential and contractor settings.
Shipping container. The technical term for an ISO-standard intermodal container. These are the units that cross oceans on cargo ships. They are built to ISO 1496 specifications, which dictate dimensions, lifting points, and structural strength.
Storage container. A general retail and rental term used by ground-storage companies. Often refers to the same intermodal unit, but the phrase also covers purpose-built ground-level containers that have never seen ocean service.
If you are shopping for storage, the difference rarely matters. The same physical unit can be sold as any of the three. What matters more is the size, the condition grade, and the delivery logistics.
Standard Conex Box Sizes
There are three standard sizes:
20-foot standard. Length 20 ft, width 8 ft, height 8 ft 6 in. Interior floor about 19 ft 4 in by 7 ft 9 in, with 7 ft 10 in of height.
40-foot standard. Length 40 ft, width 8 ft, height 8 ft 6 in. Roughly 2,350 cubic feet, double the 20-foot. Best for contractors, farms, and businesses.
40-foot high cube. Length 40 ft, width 8 ft, height 9 ft 6 in. The extra foot of headroom adds about 350 cubic feet of usable space, which matters when you store racked goods or tall equipment.
Specialty sizes (10-foot, 45-foot, refrigerated, double-door, side-opening) exist but are less common.
Common Uses by Industry
In North Carolina, containers can serve these industries:
Furniture and home furnishings. High Point hosts a furniture market twice a year, and plants, upholstery shops and finishing houses operate around Hickory, Lenoir, Thomasville and Lexington.
Pharmaceutical and biotech manufacturing. Research Triangle Park and the plants built around it include Novo Nordisk at Clayton, Fujifilm Diosynth at Holly Springs and Pfizer at Sanford.
Motorsports. Mooresville calls itself Race City USA, and race shops run from there through Concord and Charlotte Motor Speedway.
Military installations and the contractors who work around them. The installations include Fort Bragg at Fayetteville, Camp Lejeune and MCAS New River at Jacksonville, MCAS Cherry Point at Havelock, Seymour Johnson Air Force Base at Goldsboro and the Coast Guard base at Elizabeth City.
Tobacco, sweet potatoes and row crops. North Carolina grows sweet potatoes and flue-cured tobacco, and grading floors, packing sheds and equipment yards stand across the coastal plain.
Hogs and poultry. Duplin and Sampson counties raise hogs, and poultry operations run through Wilkes, Union and Duplin counties.
Ports, rail and drayage. The Port of Wilmington, the Port of Morehead City and the CSX Carolina Connector intermodal terminal at Rocky Mount handle freight moving by ship and rail.
Data centers. Apple at Maiden, Google at Lenoir and Meta at Forest City operate campuses in small foothill towns.
Banking and commercial construction. Charlotte is home to Bank of America and Truist, and construction projects include offices, stadiums and infrastructure in Uptown and along I-485.
Battery and vehicle manufacturing. The Toyota battery plant at Liberty in Randolph County opened in 2025.
Christmas trees and mountain agriculture. Ashe, Avery and Watauga counties grow Fraser fir Christmas trees, with shearing, baling and shipping done at the farm.
Boatbuilding and commercial fishing. Custom sportfishing boat builders work at Harkers Island, Beaufort and Wanchese, and production builders such as Grady-White operate in Greenville.
Craft brewing. Asheville has a brewery cluster that includes the East Coast operations of Sierra Nevada at Mills River and New Belgium in the River Arts District.
Residential construction. Framers, roofers, electricians and remodelers work in Wake, Johnston, Brunswick, Cabarrus and Union counties.
Common uses:
Tool, chemical, and equipment storage at working yards. Steel walls, lockable doors, and on-site placement make a conex a practical substitute for a built shed, a fenced compound or a temporary office.
Weather-event storage for documents, heirlooms, and inventory.
Construction jobsite storage on long-cycle builds. Project-driven needs where timing, access, and short-term affordability all matter.
Acreage and farm storage. Permanent storage for the things a garage or barn cannot fit.
How to Choose the Right Conex Box
Three questions narrow the decision quickly:
How much space do you need? List what you intend to store. A 20-foot unit works for household goods during a renovation, materials for a residential framing job, or a few pallets of stock. A 40-foot unit doubles that. Compare the list with the container dimensions before you choose.
How clean does the interior need to be? If you are storing tools, equipment, or boxed goods, a used wind-and-water-tight unit is fine. If the unit will be converted to an office, a workshop, or a clean storage space, a one-trip unit saves the cost of repainting and floor refinishing later.
Will it move? If the container will sit on a single property for the whole life of its use, buying makes sense. For a project that ends in a few months, compare the cost of renting from a rental company with the cost of buying. Our rent vs buy guide walks through the crossover math.
How Delivery Works in North Carolina
Conex boxes are delivered on a tilt-bed (sometimes called a roll-off) truck. The driver tilts the bed up, and the container slides off onto your placement site. Delivery follows this sequence:
Site assessment. Container One reviews the access route, the placement spot and the overhead clearance before scheduling. A 20-foot delivery needs 110 feet of straight clearance. The truck needs at least 15 feet of height to drive, at least 22 feet of height along the entire unloading path, and at least 10 feet of width. A 40-foot delivery needs 130 feet of straight clearance.
Surface check. Concrete, asphalt, gravel, hard-packed dirt, and grass all work. Soft, waterlogged, or steeply sloped ground may need preparation.
Final placement. The driver sets the container down on the prepared spot.
Container One's Delivery/Dispatch department schedules each delivery after payment and site review. Delivery areas across North Carolina:
The Charlotte region, inside and outside I-485, including Mecklenburg, Union, Cabarrus, Gaston and Iredell counties
The Triad and the Triangle, from Greensboro and Winston-Salem across to Raleigh, Durham and Chapel Hill
The Sandhills and the Cape Fear, from Fayetteville and Southern Pines down to Wilmington and the Brunswick County beaches
Permits and Local Rules
Permit rules depend on the municipality. Before ordering, check with your local building or planning department, and verify HOA rules if they apply. The permit guide for this state covers the questions to ask: container permits in North Carolina.
What a Conex Box Costs in North Carolina
Pricing is ZIP-specific, because delivery is part of the price. North Carolina delivered pricing: starting at $2,540 for a 20ft Wind and Water Tight container delivered in Charlotte. Prices as of 2026-08-06.
If you would rather spread the cost, rent-to-own is available through a third-party partner, My Container Rental.
Frequently Asked Questions About Conex Boxes
Conex is short for Container Express, a United States military term from the 1950s for the reusable steel boxes that moved supplies. The name stuck long after the original program ended, which is why people still say conex box while the freight industry says intermodal container and the storage industry says storage container. For buying purposes the three words describe the same thing.
For anything you are likely to buy, yes. Both describe a corrugated Corten steel box, 20 or 40 feet long, with cargo doors at one end, built to keep wind and water out. The words that actually change what you receive are the grade and the size, not which of the three names the seller happens to use.
Container One sells three standard sizes. A 20ft is 160 square feet on the ground. A 40ft is 320 square feet and gives you one long room. A 40ft high cube is the same footprint with about a foot more interior height, which matters if you are racking pallets or planning to insulate and finish the inside, because insulation takes headroom you do not get back. Bring both numbers to a zoning call, the footprint and the longest dimension, because North Carolina thresholds can be written around dimensions as well as area. Raleigh's line is 12 feet in any direction and Greensboro's portable storage unit cap is 16 feet of length.
A tilt bed truck backs in, raises the bed and slides the container off, so it needs a firm, reasonably level straight run behind the drop point and clear space overhead for the bed to rise. Overhead clearance matters in North Carolina because low limbs over older streets can limit where a bed can rise, as in Raleigh's Historic Oakwood, Charlotte's Dilworth and Greensboro's Fisher Park. Walk the route from the street to the drop spot and look up as well as down. On some older intown blocks the rear lane is the approach. The exact clearance figures for each size are listed on our sizes page.
Container One supplies and delivers every container. Charlotte and Greensboro are served from the Charlotte depot, and Raleigh from the Norfolk, Virginia depot. Charlotte is about 14.9 miles from its depot, Greensboro about 104 miles up I-85 and Raleigh about 182 miles from the Norfolk depot. On the 40ft and 40ft high cube Wind and Water Tight, Raleigh's delivered price is below Charlotte and Greensboro. Distance to the depot is only one input in a delivered price.