Modifications
Custom & Office Conex Box Builds
Looking for an office conex box for sale? We start from a new or used container and build in the doors, windows, insulation, power and fit-out you need, turning a conex box into an office, workshop, tool room or pop-up shop.
Custom builds by size
Built to your plan
8ft custom-built conex box
Start from a standard unit and add doors, windows, shelving, or other changes.
Built to your plan
10ft custom-built conex box
Start from a standard unit and add doors, windows, shelving, or other changes.
- Custom configuration
- Get Quote
Built to your plan
20ft custom-built conex box
Start from a standard unit and add doors, windows, shelving, or other changes.
- Custom configuration
- Get Quote
Built to your plan
40ft custom-built conex box
Start from a standard unit and add doors, windows, shelving, or other changes.
- Custom configuration
- Get Quote
Built to your plan
45ft custom-built conex box
Start from a standard unit and add doors, windows, shelving, or other changes.
- Custom configuration
- Get Quote
Popular modified conex builds
- Office conex box: site offices with desks, insulation, lighting, outlets, windows and AC.
- Workshops: roll-up doors, workbenches, lighting and power.
- Storage with fit-out: shelving, racking, vents and lock boxes.
- Split units: an office at one end and lockable storage at the other.
- Retail and pop-ups: service windows, counters and custom paint.
- Conex modular builds: several containers joined side by side or stacked to make larger spaces.
Modifications we quote
- Personnel doors, roll-up doors and windows
- Insulation and interior wall finishes
- Electrical, lighting and outlets
- Shelving, workbenches and racking
- Vents, AC units and custom paint
How a custom build works
- Tell us the use. Who will use it, what goes inside, and where the power comes from.
- Choose the base unit. Size, standard or high cube, new or used.
- Get a quote. We price the base unit plus each modification and give you a timeline.
- Build and deliver. The finished unit is delivered to your site.
Permits and planning
Offices and other spaces people occupy, and units wired for power, often need permits. Rules vary by city and county, so check with your local building department before you order. A high cube base leaves more headroom after insulation, which matters for spaces people work in all day.
Good to know
Questions and answers
How much does an office conex cost?
It depends on the size, the base unit and the modifications. Every build is quoted from the base unit plus each change, so a simple door costs far less than a fully fitted office.
Can I modify a container myself?
You can, but cutting openings weakens the structure, so frame them properly, and use a licensed electrician for wiring. Many buyers have the openings cut professionally and finish the inside themselves.
What size is best for a container office?
A 10ft suits one or two people, a 20ft two to four, and a 40ft a team with a meeting area or storage at one end.
Can conex containers be joined together?
Yes. Modular builds join or stack several units, but they need engineering and usually permits, so plan them with a professional.
From the blog
Buyer guides
Plain-English answers to the questions buyers ask most.
-
Conex Container Homes: Permits, Insulation & Real Costs
What it really takes to build a conex container home: zoning and permits, choosing containers, insulation, foundations, utilities and where the costs go.
-
Backyard Office in a Shipping Container: Where to Start
How to plan a backyard office in a shipping container: size, permits, insulation, power, internet, windows, heating and cooling, and the order to do things.
-
Organizing a Storage Container: Shelving, Racking & Lighting
How to organize a shipping storage container: shelving and racking options, layouts that keep an aisle clear, lighting, ventilation and labeling.
-
Shipping Containers for Retail & Pop-Up Shops: Costs and Layouts
How to turn a shipping container into a retail shop, café, bar or pop-up: choosing a container, layouts, service windows, power, permits and costs.
-
Converting a Used Container? Check These 6 Things First
Before you convert a used shipping container into an office, studio or home, check these six things: structure, floor, past cargo, paint, size and permits.
-
Converted Containers: Offices, Kiosks & Bars, and What They Cost
The most popular converted shipping containers (offices, kiosks, bars, workshops, studios and homes), what each conversion involves and what drives the cost.