Quick Answer: What Fits in a Container Office?
A 20ft container office (~14.8 m²) holds 2–4 workstations or a desk plus a small meeting table, and suits a single manager or a small team. A 40ft unit (~29.7 m²) fits 6–10 desks in open plan, or a mix of workstations, a meeting nook and storage. A high-cube unit adds about 0.3 m of headroom, which makes a real difference over a full working day. Costs range from a few thousand dollars for a basic site office to $15,000–45,000 for a finished, insulated, powered backyard or field office.
Why a Container Office
A shipping container makes a tough, portable and fast-to-deploy workspace:
- Secure — steel walls and lockable doors make it one of the most secure site offices available.
- Portable — it moves with the project, so you do not abandon a building when the job ends.
- Fast — a fitted unit can be working within weeks.
- Weatherproof — a properly insulated unit stays usable in heat, cold and rain.
- Cost-controlled — factory production keeps cost predictable per unit.
Use Cases
- Construction site office — site manager office, meeting room, document and equipment storage.
- Backyard / home office — a quiet studio steps from the house, away from household traffic.
- Remote field office — mining, agriculture, infrastructure and utility projects.
- Pop-up sales or showroom — a branded unit at events, roadside or a development site.
- Site welfare and admin — combined office plus canteen or changing facilities.
20ft vs 40ft
| Unit | Floor area | Desk capacity | Best for |
|---|---|---|---|
| 20ft | ~14.8 m² | 2–4 desks | Single manager, small team, backyard studio |
| 20ft high-cube | ~14.8 m², taller | 2–4 desks + storage | Same footprint with loft storage and better air |
| 40ft | ~29.7 m² | 6–10 desks | Open-plan team, meeting nook, larger site office |
| 40ft high-cube | ~29.7 m², taller | 6–10 desks + mezzanine | Maximum capacity on one footprint |
| Two linked units | ~59 m² | 12–20 desks | Project office with reception and meeting rooms |
Essentials
- Insulation and HVAC. A workspace needs a stable, condensation-free climate. Specify 50–100 mm insulation (more in extreme climates) plus a correctly sized split-system air conditioner or heater. Under-specifying HVAC is the most common comfort complaint.
- Power. Grid tie-in where available, or solar plus battery off-grid. Size the circuit for A/C, computers, lighting, a printer and a kettle — peak load matters more than average.
- Data. Hardwired ethernet to fixed desks plus strong Wi-Fi, and a cellular backup for remote sites where the fixed line is unreliable.
- Lighting. Glare-free LED panels with task lighting over desks; avoid a single harsh central light.
- Layout. Put desks along the window wall for daylight, a meeting table at the far end, and storage between zones. Keep circulation clear of chairs.
- Acoustics. Hard steel surfaces echo. Acoustic ceiling panels and soft furnishings noticeably reduce noise in an open-plan container office.
- Windows and egress. In hot climates specify solar-control glazing; ensure at least one compliant escape route.
Site Office vs Backyard Office
| Site office | Backyard office | |
|---|---|---|
| Foundation | Blocks, skids or compacted pad | Piers, slab or footings |
| Services | Temporary power, water if needed | Full utility connection |
| Permits | Temporary-use approval | Accessory-structure rules apply |
| Relocatable | Yes — moves with the project | Usually fixed once placed |
| Best for | Construction, mining, events | Home working, studio, therapy room |
Fit-Out Cost Breakdown
| Item | Indicative cost (20ft) |
|---|---|
| Container unit (new or one-trip) | $3,000–6,000 |
| Insulation and lining | $2,000–6,000 |
| Windows, door and glazing | $1,500–5,000 |
| Electrical fit-out and lighting | $2,000–5,000 |
| HVAC (split system) | $800–2,500 |
| Data and networking | $500–1,500 |
| Flooring and finishes | $1,500–5,000 |
| Desk joinery and storage | $1,000–4,000 |
| Cladding (exterior) | $1,500–5,000 |
| Indicative total (fitted, 20ft) | $15,000–45,000 |
A basic site office — shell, power, lighting and desk mounts — can cost only a few thousand dollars. A finished backyard or field office with insulation, glazing, HVAC and joinery sits at the upper end. Multi-unit site compounds scale roughly linearly with the number of units.
Permits and Placement
- Zoning. A backyard office may be allowed as an accessory structure; a site office often needs temporary-use approval.
- Permanent vs temporary. On wheels (chassis) a unit may count as temporary; on a foundation it is permanent. Rules differ, and so do the requirements.
- Electrical. Wired fit-out usually requires a licensed electrician and an inspection.
- Egress and safety. Provide a compliant escape route, smoke alarms and clear access.
- Placement. Confirm access for delivery and craning, and keep the unit clear of drainage and overhead cables.
Comfort in Extreme Climates
- Hot and humid: 75–100 mm insulation, reflective or ventilated roof, solar-control glazing, dehumidification and correctly sized cooling.
- Cold: 100 mm+ insulation, thermally broken frames, double or triple glazing and heat-recovery ventilation to control condensation.
- Coastal: corrosion-treated steel and marine-grade coatings.
- Remote: solar plus battery, water storage and cellular internet for genuine off-grid operation.
Checklist Before You Order
- Decide the desk count and use — that sets 20ft, 40ft or high-cube.
- Specify insulation and HVAC for your climate, not the supplier’s default.
- Calculate peak electrical load including air conditioning and office equipment.
- Plan data — ethernet, Wi-Fi and a cellular backup for remote sites.
- Confirm windows, egress and acoustics for daily comfort.
- Check zoning and permits — accessory structure or temporary use.
- Plan delivery and craning access before the unit arrives.
FAQ
How big is a container office?
A 20ft unit gives ~14.8 m² and suits 2–4 desks or a desk plus a small meeting table. A 40ft unit gives ~29.7 m² and fits 6–10 desks in open plan. A high-cube adds roughly 0.3 m of height and useful loft storage.
How many desks fit in a 40ft container office?
Typically 6–10 workstations, or a mix of desks, a meeting nook and storage. Layout and window placement matter: desks along the window wall with a meeting table at the far end is the most efficient arrangement.
Can a container office be off-grid?
Yes. Solar plus battery, a composting or small septic solution, water storage and cellular internet make a fully off-grid office feasible. Size the system against the air-conditioning load, which is usually the largest draw.
Do I need a permit for a backyard office?
Often yes if it is permanent or wired to mains. Many areas allow small accessory structures under a size threshold, but rules vary. Check local zoning before buying, and confirm whether the unit counts as permanent or temporary.
Is a container office secure?
Very. Steel walls and lockable doors make it one of the more secure site offices available, which is why construction and mining projects favour them for documents, IT equipment and tools.
How do I stop a container office feeling cramped?
Specify a high-cube unit, maximise glazing on the long wall, use a light colour palette, add acoustic ceiling panels, and plan storage vertically. Removing a section of internal wall to create one open space also helps in a 40ft unit.
How much does a container office cost?
A basic site office can be a few thousand dollars; a finished 20ft backyard or field office commonly runs $15,000–45,000 depending on insulation, glazing, HVAC and joinery. A 40ft fitted office costs proportionally more.
How long does it take to set up?
A fitted unit is typically ready in 4–10 weeks from order, including production and shipping, plus local permits. A basic site office using a stock unit can be working within days of delivery.
