Running a Container Gym for 4 Years: The Honest Truth (Costs, Clients & Lessons Learned)

If you’re thinking about setting up a container gym or garden gym, you’re probably asking yourself one big question:

“Will it actually work long-term?”

I’ve been running my personal training business from a container gym for the last four and a half years, training around 35–40 clients every week.

In this blog, I’ll break down:

• What’s worked

• What hasn’t

• What I’d do differently

• And whether a container gym is actually worth it

Why I Switched to a Container Gym

Before setting up my own space, I was renting floor space in a commercial gym.

Like many personal trainers, I was:

• Paying high monthly rent

• Limited by someone else’s space

• Lacking privacy for my clients

Then lockdown hit — and I lost access to the gym overnight.

I spent months training clients outdoors from the back of my pickup truck using gazebos, heaters, and floodlights. That’s when I realised:

I needed my own space.

A container gym gave me a way to:

• Start my own PT business

• Keep costs low

• Create a private, high-quality training environment

How Much Does a Container Gym Cost?

My setup cost around £20,000–£22,000 including equipment.

Compared to:

• Renting a commercial gym

• Or opening a high street PT studio

…it’s a significantly lower-risk option.

With a container gym:

• You own the asset

• Your costs are predictable

• You avoid large rental increases

For most personal trainers, this makes it one of the most affordable ways to start a gym business in the UK.

Can You Run a Successful PT Business From a Container Gym?

Yes — absolutely.

For the last four years, I’ve consistently trained:

• 35–40 clients per week

• 1-to-1 and 2-to-1 sessions

• Occasional small groups outdoors

The key is how you structure your sessions.

In a 20ft container gym:

• Two clients at a time is ideal

• It allows better coaching

• And keeps the experience personal

Because overheads are low, profitability stays high — even without large group sessions.

What It’s Like Training Clients in a Container Gym

A standard 20ft container gives you around:

• 6m x 2.5m indoor space

• Plus optional outdoor space (decking or training area)

It’s compact — but it works.

The key is:

• Smart equipment selection

• Good programming

• Keeping the space organised

Everything needs to have its place.

In a smaller gym:

• You can’t leave equipment lying around

• You need to think ahead with sessions

• You often adapt workouts on the fly

When the weather is good, opening the doors and using the outdoor space completely transforms the experience.

The Biggest Benefits of a Container Gym

1. Lower Costs & Higher Profit Margins

Compared to a commercial gym or PT studio, your overheads are significantly lower.

2. Flexibility & Lifestyle

You choose your hours, your clients, and your schedule.

For me, that means:

• Being present for my kids

• Finishing work earlier

• Running a business that fits my life

3. Privacy for Clients

Many people dislike busy gyms.

A container gym offers:

• A quieter environment

• A more personal experience

• Less intimidation

The Downsides (Honest Reality)

Container gyms aren’t perfect — and it’s important to be realistic.

1. Space Limitations

• You can’t run large group sessions indoors

• Bigger machines (leg press, etc.) won’t fit

2. Finding a Location

This is often the hardest part.

You need:

• Land

• Permission

• Access to power

• Parking and amenities

3. Temperature Control

Without air conditioning:

• Cold mornings in winter

• Warm afternoons in summer

4. Relocation Challenges

If you lose your site, moving a container gym requires:

• Planning

• Cost

• Logistics

Mistakes I Made (So You Don’t Have To)

Looking back, a few key lessons stand out:

• Drilling through the container structure can compromise waterproofing

• Poor groundwork can affect doors and alignment

• Wrong equipment choices waste valuable space

These are all things we now solve properly with our Gym In A Tin builds.

Who Is a Container Gym Perfect For?

A container gym is ideal for:

• Personal trainers going independent

• Outdoor/bootcamp trainers needing a base

• Homeowners wanting a high-quality garden gym

• Businesses looking for an on-site fitness solution

If you focus on:

• Functional training

• Personal training

• Small group sessions

…it works extremely well.

Who Is It NOT For?

It may not suit you if:

• You want a large commercial-style gym

• You rely heavily on fixed resistance machines

• You plan to run large group classes indoors

• You’re based in a dense city with limited space

Final Thoughts: Is a Container Gym Worth It?

For me, it’s been one of the best decisions I’ve made.

It’s allowed me to:

• Build a profitable PT business

• Reduce financial pressure

• Create a lifestyle I actually enjoy

And most importantly:

It’s given me control.

Thinking About Building Your Own Container Gym?

If you’re considering a container gym or garden gym in the UK, the key is getting it right from the start:

• The layout

• The equipment

• The build quality

• The site setup

At Gym In A Tin, we help you design and install a fully customised, plug-and-play container gym tailored to your needs.

👉 Get in touch for a free consultation and let’s design your ideal setup.