A one-trip container as a site office shell: what arrives, and what you finish
Yes, as a shell: a one-trip 20ft arrives with near-new paint, a clean floor, light, a cord in, a vent and a marked spot for a weld-in man door, and you finish the inside at your pace. Insulation, a real circuit and anything that makes it a room people work in all day are yours to add, and your city's to permit.
A shell, not a building
This is a near-new box with light, a cord in, a vent and a place for a door. Insulation, wall covering, flooring, a real circuit and a mini-split are yours to add when you are ready. It is never a dwelling, and nobody should sell it as one.
A one-trip box is the right grade for something you will finish and sit in: near-new paint, a clean floor and seals that hold. If it is a shed first and maybe an office later, a used box works. See one-trip vs used.
The door and the room
The weld-in man door and sliding window are freight items, quoted with the container and installed by a welder in an afternoon. They go on the long wall near the cargo-door end, so the far end stays a wall for the desk. Order them with the box so one visit does both.
Inside, a standard 20ft is 7'10" high and 7'8" wide. Furring strips and 1-1/2 inch rigid foam leave about 7'4" of width and 7'6" of height. A high cube adds a foot of height. The plan set draws the finished room.
Power and the permit question
Start with a cord in through the outlet splitter. When you want a real circuit, an electrician treats a container like a detached shed.
An occupied accessory structure usually needs a permit, so call your city or county before you finish the inside. See permit rules. For a contractor who needs a locked tool room more than a desk, the tool crib is the simpler buy.
The layout, drawn to the box
This is sheet 2 of the free Office Shell plan set: the 20ft standard, one-trip container drawn from real ISO dimensions, with every shelf, rack and opening placed. Where the weld-in man door goes, where the lights and the outlet go, what the finished room measures after furring and foam. A shell, never a dwelling.
All seven sheets: Cover and package price · Floor plan · Long-wall elevation: lights, outlet, door location · Cross section: the shell · Site, pad and leveling · Parts, cut list and tools · Build order and disclaimer. You buy locally: a cord and corner blocks for the shell — roughly $120–$220; the finish-out is yours.
See the Office Shell package — container and kit, delivered price by ZIP →
Buying a container?
Longleaf sells used and one-trip 20ft and 40ft shipping containers, delivered by tilt-bed across the Pine Belt. Enter your ZIP for the delivered price — it comes straight from the supplier feed and already includes the haul. Locks, vents, shelving and lights are on the accessories page. We sell; we do not rent.
Keep reading
- One container for the whole Mississippi lease: four shelf bays, two locks, the split drawn before it comes — How a hunting club can share one 40ft container on a Mississippi lease: four numbered shelf bays, a pallet each, a shared hook wall, two padlocks, drawn first.
- Storing hay in a container on a Pine Belt farm without mold: vents, pallets, cured hay only — How to store hay in a 40ft shipping container on a Mississippi farm without mold: about 300 square bales, pallets, vents low-in high-out, and cured hay only.
- Conex box for sale near me: how to buy one in Mississippi without a yard nearby — How to buy a conex box in Mississippi with no yard nearby: where the boxes ship from, what sets the delivered price, the grades, and what to check first.
- A container tool crib vs a rented job-site box for a Hattiesburg contractor — Container tool crib vs a rented job box for Hattiesburg contractors: when buying wins, how to set up shelving and a pipe rack, and moving it to the next job.
- What is a one-trip container, and is it worth buying? — One-trip vs used container: what one-trip really means, how WWT and cargo-worthy grades work, and when the near-new box is worth the premium for a buyer.
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