20ft Container Office – New, Slate Gray with Mini Split

A 20ft Shipping Container Office That Arrives Wired and Climate-Controlled

This slate gray 20-footer is not a container waiting for a fit-out; it is a finished room that happens to be built inside one. Shiplap walls, 120V wiring, and a mini split for heating and cooling are already installed, which means once it is positioned and connected you are close to move-in rather than months of interior work. The mini split is the detail that makes it usable year round instead of only in mild weather.

Twenty feet is the approachable size for residential settings. It is big enough to be a genuine room — a home office, a studio, a guest space, a quiet workshop — yet short enough to place in a back garden, a side yard, or a rural lot without dominating the property or requiring heavy groundworks. The slate gray exterior keeps it looking deliberate rather than industrial.

Specifications at a Glance

• Condition grade: New, delivered in original condition
• External dimensions: 20' × 8' × 8'6"
• Internal dimensions (approx.): 19'4" × 7'8" × 7'10"
• Interior: shiplap wall finish throughout
• Electrical: wired for a standard 120V supply
• Climate: mini split system fitted for heating and cooling
• Exterior: slate gray finish
• Delivery: flat $500 to all 50 states, tax-inclusive pricing

Backyard Office, Studio, or Guest Room

Finished container rooms sell to people adding square footage without adding a building project.

• A backyard home office or remote-work studio
• A guest room or compact living space
• An art, music, or creative hobby room
• A quiet retreat separated from the main house
• Premium tool and equipment storage that stays climate-stable

Power, Permits, and Placement

Three things decide how smoothly this goes. First, the electrical supply: plan the route from your panel to the placement point and have a licensed electrician handle the final connection. Second, permits — a habitable or occupied structure is treated differently from a storage box in most jurisdictions, so ask your building department early. Third, access: allow roughly 60 feet of straight approach and about 15 feet of overhead for a tilt-bed drop onto level bearing points. For a taller interior, the 20ft high cube office build adds a foot of headroom. Compare finished builds in our home and office container listings, see what else this size offers in the 20-foot range, and read how delivery is scheduled before ordering.

Frequently Asked Questions

What electrical supply does the mini split need?

The unit is wired for a standard 120V supply, and the final connection should be made by a licensed electrician who can confirm your circuit capacity. Plan the supply route to the placement point before delivery. Retrofitting a feed to a finished container after it is set is more disruptive than trenching or running it beforehand.

Do I need a permit for a container office in my yard?

Very likely, and the answer varies by municipality. Structures used as offices, studios, or living space are generally treated differently from a storage container, and setback, foundation, and electrical rules may all apply. Contact your local building department during planning rather than after the unit has been delivered.

Can it stay comfortable in summer and winter?

That is what the fitted mini split is for. It handles both heating and cooling, so the interior does not simply track the outside temperature the way an uninsulated steel box does. Keep the doors and windows sealed and the system serviced, and the room stays usable through both extremes.