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Pillar Guide
Conex Box in New Jersey: A Complete Guide for New Jersey Buyers
Conex box, shipping container, storage container: the words get used interchangeably. What changes from one New Jersey 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.
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.
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 New Jersey, containers can serve these industries:
Warehousing, trucking and port businesses around Port Newark, Elizabeth and the New Jersey Turnpike, as lockable overflow space for parts, packaging and equipment.
Contractors and renovation crews working on older houses and apartment buildings in Essex, Hudson, Union and Passaic counties.
Laboratories, manufacturers and offices along the Route 1 and Interstate 287 corridors, for equipment, records and supplies kept on site.
Farms, nurseries and horse properties in Hunterdon, Monmouth, Sussex and Warren counties.
Marinas and boatyards on the Raritan Bay and the northern Shore, for gear stored between seasons.
Schools, towns and public works yards, for seasonal equipment stored between projects.
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.
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.
How long will you use it? 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 New Jersey
Container One offers Tilt Bed and Customer Assist delivery. With Tilt Bed, the trailer tilts back and the container slides off without help from you. Customer Assist requires an anchor point on your site: a chain connects the container to it, and the container slides onto the ground as the trailer pulls away. Delivery follows this sequence:
Site check. You confirm the access route, the placement spot and the overhead clearance before delivery. 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 contacts you to schedule each delivery. Delivery areas across New Jersey:
Newark, Jersey City and the towns of Essex, Hudson, Union, Bergen and Passaic counties
Edison, New Brunswick, Freehold and the towns of Middlesex and Monmouth counties
Trenton, Princeton, Morristown and the towns of Mercer, Somerset, Hunterdon, Morris, Sussex and Warren counties
Permits and Local Rules
Permit requirements depend on city regulations inside city limits and county regulations outside city limits. 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 New Jersey.
What a Conex Box Costs in New Jersey
Pricing is ZIP-specific, because delivery is part of the price. New Jersey delivered pricing: starting at $2,173 for a 20ft Wind and Water Tight container delivered in Newark. Prices as of October 14, 2026.
Frequently Asked Questions About Conex Boxes
As of October 14, 2026, a 20ft Wind and Water Tight conex box starts at $2,173 delivered in Newark, and a 40ft Wind and Water Tight starts at $2,385 delivered in Newark. Your written quote is priced for your address, size and grade.
It can, when the truck has its 110 feet of straight, clear space, which on a Newark or Jersey City block may have to start in the street. The container itself needs a level spot about 20 by 8 feet, placed where the town's zoning allows it.
It depends on the size, the use and the lot. The state code exempts garden-type utility sheds and similar structures from a construction permit for building work when they are 200 square feet or less, 10 feet or less in height, accessory to buildings of Group R-2, R-3, R-4 or R-5 and without a water, gas, oil or sewer connection (N.J.A.C. 5:23-2.14(b)8). A 20ft conex box covers 160 square feet and stands 8 feet 6 inches tall, while a 40ft covers 320 square feet, over the limit. The exemption is limited to structures accessory to those residential groups, which include homes and apartment buildings. The construction official decides whether a container counts as a similar structure. Electrical work still needs a permit, and zoning approval from the town is a separate step.
The zoning code lists portable storage units, which include shipping containers used for on-site storage, as a conditional use in the I-1, I-2, I-3, EWR, EWR-S and PORT districts, and the Central Planning Board reviews container storage through site plan approval. Chapter 22 of the same code bars containers left more than 30 days in redevelopment areas unless the plan expressly allows them, and it lists the River Public Access and Redevelopment Plan area, which includes industrial districts, among those areas. Ask the Office of Planning and Zoning whether your lot is in a redevelopment area and, if it is, whether that area's plan allows containers. Where storage is allowed, Chapter 22 limits stacks to four containers, requires space between them for inspection and rodent control, and requires surveillance cameras on site. It also requires shipping container operators to hold a Shipping Container Storage License, renewed yearly, and to report the containers on site to the Office of Planning and Zoning each month. As written, the chapter defines an operator as any owner, company or other entity that stores shipping containers in the city, which includes a business keeping its own conex box. Ask the office too, at 973-733-6333, how the city applies the license to a lot like yours.
Wind and Water Tight keeps wind and rain out, and it suits tools, equipment and boxed goods. In humid weather, add vents or moisture absorbers and keep stored goods off the walls.