Conex Box in North Carolina: What It Is and What to Buy

What is a Conex Box?

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. In North Carolina, contractors, farmers, and homeowners 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.

For practical buying purposes the three terms describe the same thing across North Carolina: a corrugated steel container, 20 or 40 feet long, with cargo doors on one end, designed to keep wind and water out for decades.

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

North Carolina customers typically choose from three sizes:

20-foot standard. Length 20 ft, width 8 ft, height 8 ft 6 in. Roughly 1,170 cubic feet of interior space, about the same as a two-car garage. Fits most residential driveways. The most popular size in our network.
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. We can source them on request.

Common Uses by Industry

Demand in North Carolina is anchored by Furniture and home furnishings. High Point hosts a furniture market twice a year that fills warehouses and truck lanes across the Triad, and the plants, upholstery shops and finishing houses around Hickory, Lenoir, Thomasville and Lexington keep frames, foam and finished goods under cover between runs., Pharmaceutical and biotech manufacturing. Research Triangle Park and the plants built around it, including Novo Nordisk at Clayton, Fujifilm Diosynth at Holly Springs and Pfizer at Sanford, have kept trade contractors and equipment vendors on the same sites for years at a stretch., Motorsports. Mooresville calls itself Race City USA, and the shop belt running from there through Concord and Charlotte Motor Speedway stores chassis, bodies, tires and tooling that has to lock., Military installations and the contractor base around them. 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 anchor a wide base of contractors who store tools and parts on site., Tobacco, sweet potatoes and row crops. North Carolina leads the country in sweet potato and flue-cured tobacco production, and the grading floors, packing sheds and equipment yards across the coastal plain run on seasonal storage that locks., Hogs and poultry. Duplin and Sampson counties are among the largest hog producing counties in the country, and the poultry operations through Wilkes, Union and Duplin keep feed, bedding and equipment dry between houses., Ports, rail and drayage. The Port of Wilmington, the Port of Morehead City and the CSX Carolina Connector intermodal terminal at Rocky Mount generate steady demand for on site storage from drayage carriers, warehouses and freight forwarders., Data centers. Apple at Maiden, Google at Lenoir and Meta at Forest City put very large campuses in small foothill towns, and the trade contractors who build and service them stage material on site for long stretches., Banking and commercial construction. Charlotte is one of the country's major banking centers, home to Bank of America and Truist, and the office, stadium and infrastructure work that follows keeps job site containers in the ground Uptown and along I-485., Battery and vehicle manufacturing. The Toyota battery plant at Liberty in Randolph County opened in 2025 and has pulled a supplier and contractor base into the eastern Triad that did not exist five years ago., Christmas trees and mountain agriculture. Ashe, Avery and Watauga counties are the center of the Fraser fir crop, and the shearing, baling and shipping season runs on storage placed right at the farm., Boatbuilding and commercial fishing. Custom sportfishing boats out of Harkers Island, Beaufort and Wanchese, and production builders such as Grady-White in Greenville, keep molds, rigging and hardware in containers alongside the shop., Craft brewing. Asheville anchors a brewery cluster that includes the East Coast operations of Sierra Nevada at Mills River and New Belgium in the River Arts District, and grain, kegs and packaging all need dry, lockable space., Residential construction. Wake, Johnston, Brunswick, Cabarrus and Union are among the fastest growing counties in the Southeast, and framers, roofers, electricians and remodelers are the single most common container buyer in every one of them., alongside residential construction and the storage cycle that tropical systems and their inland remnants drives.

The uses we see most often:

Tool, chemical, and equipment storage at working yards. Steel walls, lockable doors, and on-site placement make a conex the simplest substitute for a built shed, a fenced compound, or a temporary office.
Weather-event storage for documents, heirlooms, and inventory. Long-cycle uses where the container becomes part of the operation rather than a temporary fix.
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? Photograph what you intend to store. A 20-foot unit holds the contents of a three-bedroom home, the materials for one residential framing job, or two pallets stacked four high. A 40-foot unit doubles that. If your list of contents fits on a single garage floor, a 20-foot is enough.
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. If you are running a project that ends in three to twelve months, renting is usually the better answer. 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. Most deliveries follow the same physical sequence:

Site assessment. When you book, we walk through the access route, the placement spot, and overhead clearance. A 20-foot delivery needs roughly about 70 feet of straight clearance and at least at least 14 feet of overhead room. A 40-foot delivery needs about about 100 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. We can advise.
Final placement. The driver positions the truck, levels the container, and confirms placement before leaving. Repositioning later is possible but usually requires a second visit.

Delivery timing is honest, not aspirational. Across North Carolina:

The Charlotte region, inside and outside I-485, including Mecklenburg, Union, Cabarrus, Gaston and Iredell counties: typically 1 to 2 weeks.
The Triad and the Triangle, from Greensboro and Winston-Salem across to Raleigh, Durham and Chapel Hill: typically 1 to 2 weeks.
The Sandhills and the Cape Fear, from Fayetteville and Southern Pines down to Wilmington and the Brunswick County beaches: typically 1 to 2 weeks.

Permits and Local Rules

Permit rules depend on the municipality. Rural counties often have no requirement at all for a temporary storage container. Urban codes are stricter, and some HOAs prohibit container placement entirely. Before ordering, check with your local building or planning department, and verify HOA rules if they apply. Our local guide walks through the most common scenarios: container permits in North Carolina.

What a Conex Box Costs in North Carolina

Pricing is ZIP-specific, because distance from the serving depot drives a meaningful part of the total. North Carolina delivered pricing: starting at $2,540 for a 20ft Wind and Water Tight container delivered in Charlotte. Price always includes delivery. That figure is an anchor for the best-served part of the state, not a quote for every address, and it was captured live on 2026-08-06.

We do not publish statewide price tables on this page, because they are inaccurate the moment they are written. Tell us your ZIP and what you need, and we will send back an all-in number with delivery included. No haul fee surprises, no padded line items. If you would rather spread the cost, ask about rent-to-own when you call.

Frequently Asked Questions About Conex Boxes

What does conex actually mean? +

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 an older contractor in North Carolina will say conex box while the freight industry says intermodal container and the storage industry says storage container. Around Fort Bragg and Camp Lejeune you hear conex more than anywhere else in the state. For buying purposes the three words describe the same thing.

Is a conex box the same as a shipping container? +

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 for decades. 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.

What sizes do conex boxes come in? +

Three sizes cover almost every order in North Carolina. A 20ft is 160 square feet on the ground and fits driveways and tight lots. 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 are written around dimensions at least as often as area. Raleigh's line is 12 feet in any direction and Greensboro's portable storage unit cap is 16 feet of length.

What does the delivery truck need to get a conex box onto my site? +

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. That overhead requirement is what surprises people here, because Raleigh is called the City of Oaks for a reason and the willow oaks over Dilworth, Fisher Park and Historic Oakwood decide the placement before the gate width does. Walk the route from the street to the drop spot and look up as well as down. On older intown blocks the rear lane is frequently the real approach. The exact clearance figures for each size are listed on our sizes page.

Where do North Carolina's containers come from? +

Containers are supplied and delivered by Container One, dispatched from the depot at Charlotte and, for the northeastern half of the state, from the depot at Norfolk, Virginia. Charlotte is the shortest haul in the state at about 14.9 miles and carries the lowest delivered price on the 20ft Wind and Water Tight anchor. Greensboro runs off that same Charlotte depot about 104 miles up I-85. Raleigh is the interesting one: it is the longest run of the three at about 182 miles, and on the 40ft and 40ft high cube Wind and Water Tight it is still the cheapest city in the state, because Norfolk is a port yard and those boxes have not been repositioned inland before you buy them. Distance to the depot is only one input in a delivered price.

Conex Box in North Carolina: A Complete Guide for North Carolina Buyers