If you’re running an event, you need more than a fold-out table and a marquee. You need a proper base — something solid, weatherproof, and built to handle long days, last-minute changes, and the occasional minor crisis.
That’s where container offices come in. At Instant Sea Containers, our 20-foot and 40-foot high cube (HC) models are the go-to options for crews across WA. They’re comfortable, secure, and ready to plug in and get moving.
The question isn’t which one’s better — it’s which one actually fits the way your site runs. This guide breaks down the differences so you can make the right decision.
What They’ve Got in Common
No matter which size you choose, you’re getting a tough, event-ready setup built to perform. These are our features across both the 20’HC and 40’HC offices:
- Made from corten steel (maritime-grade)
- Fully insulated floors, walls, and ceilings
- Reverse cycle air-conditioning
- Commercial-grade vinyl flooring
- Internal power points throughout
- LED lighting + emergency lighting
- Plug & play ready
- Single phase DB
20’HC Event Office Overview
Our 20-foot HC Event Offices are the go-to for smaller event teams or tight sites. They’re compact, easy to place, and still packed with all the essentials.
Two Models Available
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- Secure and straightforward, ideal for general site use.
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- Creates a more open, relaxed feel.
Key Features
- Large aluminium window with security grills and flyscreen
- Insulated SIP walls and ceilings – building code compliant
- Slimline LED lighting and emergency exit lighting
- Reverse cycle air-conditioning
- Smoke detector
- Double power points throughout
- 15amp plug & play inlet – quick and easy connection
- Single phase DB board
- Commercial-grade vinyl flooring
Best For
- Site managers or event coordinators
- Artist dressing or green rooms
- Smaller-scale events or activations
- Sites with limited space for infrastructure
Main Pros
- Easy to transport and position
- Fast setup with plug and play
- Clean, professional finish
Considerations
- One open-plan layout – no internal partitioning
- Limited space for multi-person teams or split uses
40’HC Event Office Overview
Our 40-foot HC Event Offices are built for bigger teams, busier sites, or events that need multiple functions in one container. With internal partitions and extra floor space, they’re the go-to for larger operations.
Two Models Available
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- Split into two even sections.
- Great for separating work areas or teams.
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- Centre room with two smaller rooms on each end.
- Ideal for admin, dressing rooms, or makeup + crew spaces.
Key Features
- Commercial-grade steel entry door with lockbar (padlock-ready)
- Large aluminium window with flyscreen and security grills
- Insulated SIP walls and ceilings – fully compliant
- Reverse cycle air-conditioning
- Slimline LED lighting + emergency exit lighting
- Smoke detectors
- Double power points throughout
- 32amp plug & play inlet – supports higher power needs
- Single phase DB board
- Commercial-grade vinyl flooring
Best For
- Event HQs with multiple staff roles
- Larger-scale events and festivals
- Sites needing multi-purpose functionality in one unit
- Back-of-house operations, green rooms, admin hubs
Main Pros
- More internal space and layout flexibility
- Separate rooms = more privacy and function separation
- Better suited for longer or more complex events
Considerations
- Requires more site space
- May require more power availability (32amp)
How to Choose the Right Fit
Both the 20’HC and 40’HC will get the job done. It more comes down to how your event runs and what your team actually needs on the ground.
1. Team Size & Function
- Just one or two people? A 20’HC is usually plenty.
- Multiple roles (like admin, artist coordination, or makeup?) Go with a 40’HC.
2. Available Space Onsite
- Tight bump-in areas or limited real estate? A 20’HC is easier to position.
- Got room to move? The 40’HC gives you options.
3. Use Case
- Need a simple green room or a one-person office? 20’HC.
- Running a full backstage operation? 40’HC.
4. Power Access
- 20’HC runs off a 15amp connection (standard and easy).
- 40’HC needs a 32amp supply (more suited to bigger setups with access to infrastructure).
5. Event Duration
- Short gigs? 20’HC keeps it simple.
- Multi-day or touring setups? The space and separation in a 40’HC can make life easier.
Get the Event Container That Fits Your Needs
Both container office sizes are solid choices. The 20’HC is compact and easy to work with, perfect for smaller events or simple setups. The 40’HC gives you more room and flexibility, which comes in handy for larger teams or more involved operations.
If your setup is a bit more complex or you’ve got specific requirements, give us a call. We’ve built modified container office solutions for some of the biggest events in WA, and we can help tailor something that works for you.
To see more options or talk through what you need, check out our full range of shipping containers for events, or get in touch with the team.
Managing Director at Instant Sea Containers
Scott Rawson is the Managing Director of the Instant Products Group, a specialist group of companies that offer portable building solutions, including sea containers, transportable offices, and portable sanitation products.
