View More Garden Room Images
Click on images below to see larger versions of garden rooms
Click on images below to see larger versions of garden rooms and offices
Click on images below to see larger versions of painted garden rooms
Click on image below to see larger versions of painted garden rooms
A 4m x 3m garden room is one of the most useful sizes you can choose for a home office, studio, hobby room or relaxing space in the garden. It gives you enough room for a proper desk, office chair, storage and additional furniture while retaining a manageable footprint for many UK gardens. If you intend to use the building regularly throughout the year, I would also look closely at a 4m x 3m insulated garden room rather than choosing simply on appearance or headline price.
I’m Robin Antill, founder of 1st Choice Leisure Buildings, and I’ve been involved with garden buildings since 1979. I left school at 15 and started my first business, Marina Sheds, in 1979. In those early days I wasn’t simply selling sheds. I made buildings, delivered them and dealt directly with customers, and that hands-on experience taught me a great deal about timber construction and where quality really matters.
More than 45 years later, garden buildings have changed considerably, but my advice has not changed as much as you might imagine. Don’t choose a garden room from the photograph or price alone. Look at the walls, framing, floor and roof, examine the doors and windows, find out exactly what is insulated and think carefully about how you are actually going to use the room.
A good 4×3 garden room should be chosen for what it will do for you over many years. Somebody wanting an occasional summer retreat has different requirements from somebody planning to work in their garden office for eight hours a day throughout winter. Our job is to help you understand those differences rather than automatically steer you towards the most expensive building.
You can compare the 4m x 3m garden rooms on this page, browse our wider range of garden rooms and garden offices, or visit our Surrey garden building show site to inspect full-size buildings for yourself.
Why Choose a 4m x 3m Garden Room?
A nominal 4m x 3m garden room gives you around 12 square metres of footprint before allowing for wall thickness. That makes it a very practical size: substantial enough to create a proper usable room while still being compact enough for many gardens.
For home working, there should be room for a good-sized desk, office chair, shelving and storage without the room feeling cramped. With sensible planning, many 4m x 3m layouts can also accommodate two workstations.
The same room could be used as an art studio, craft room, gym, music room, games room or peaceful retreat. This versatility is one reason I like this size. What starts as today’s garden office could have an entirely different use in five or ten years.
Is a 4m x 3m Garden Room Big Enough for a Home Office?
For most people, yes. A 4m x 3m garden office provides enough room to create a genuine working environment rather than simply somewhere to put a laptop.
If two people will use the office, plan the furniture before ordering. Two sensibly sized workstations can work very well, but large desks combined with substantial storage may make the room feel crowded.
Think about where your computer screens will face, where the sun comes from and where you need storage. Door and window positions can make a surprising difference to how well the room works as an office, so it is worth planning the layout before choosing the final building.
Should You Choose a 4m x 3m Insulated Garden Room?
If you intend to use the building regularly throughout the year, I would give serious consideration to a 4m x 3m insulated garden room. Insulation can make a considerable difference to comfort and helps make an office, studio or hobby room more practical outside the warmer months.
However, don’t buy a building simply because the word “insulated” appears in its description. Find out exactly what is insulated. Compare the walls, roof and floor and look at the doors and windows as part of the complete specification.
Our insulated garden rooms include different specifications. On this page, the Platinum Fleet and Odiham are sold as fully insulated models, with insulated walls and roof and double glazing as standard. Royal sits at the premium end of our garden room range for customers looking for a higher overall specification.
Insulation does not create heat, so suitable heating may still be required during colder weather. Likewise, ventilation and shading can become important during summer. Think of insulation as part of the complete room rather than a feature to consider in isolation.
Royal or Platinum 4m x 3m Garden Room?
The 4m x 3m garden rooms on this page include both Royal and Platinum models. I would not automatically tell everybody to choose Royal because it is the premium range, nor choose Platinum simply because the initial investment can be lower. The sensible approach is to compare the specification against how you intend to use the building.
Platinum Garden Rooms
Our Platinum garden rooms offer a strong balance between specification, flexibility and price. If insulation is important, look particularly closely at the Platinum Fleet and Platinum Odiham. Fleet has an apex roof while Odiham offers a contemporary pent-roof appearance.
Both are sold as fully insulated models and include insulated walls and roof together with double glazing as standard. Other Platinum models provide different designs and specifications, with insulation available as an option on selected buildings.
Royal Garden Rooms
Royal is our premium garden room range and is particularly worth considering when the building will become an important and regularly used part of your home or working life.
On this page you can compare Royal models alongside the Platinum alternatives. If you expect to use your garden room regularly throughout the year and want the premium specification, Royal deserves serious consideration. If a Platinum model provides everything you need, there is no reason to spend more simply for the sake of buying the higher range.
After all these years in the garden building business, my view is straightforward: good value means buying the right specification for your needs. The cheapest building is not automatically the best value, and neither is the most expensive.
| Feature | Platinum Garden Rooms | Royal Garden Rooms |
| Best for | Home offices, hobbies, studios and garden retreats | Premium offices, studios and larger multi-purpose rooms |
| Price position | Lower initial investment | Premium specification and price |
| Popular models | Fleet Apex and Odiham Pent | Bletchley, Buckingham, Denham and Marlow |
| Typical sizes | Fleet and Odiham available up to approximately 16×12 ft | Royal models available up to approximately 20×12 ft |
| Insulation | Fully insulated Fleet and Odiham models with insulated walls and roof | Premium fully insulated construction |
| Double glazing | 14mm double glazing on Fleet and Odiham | Higher-specification double-glazed garden room range |
| Design choice | Apex Fleet or contemporary pent-roof Odiham | Wider choice of distinctive Royal designs and configurations |
| Why choose it? | You want an insulated garden office or room with an excellent balance of comfort, quality and price. | You want a more substantial garden room with premium specification and additional floor-space options. |
Why My Garden Building Experience Matters
I left school at 15 and started Marina Sheds in 1979. I was directly involved in making garden buildings, selling them, delivering them and talking to the customers who were going to use them. That practical experience taught me to look beyond attractive photographs and concentrate on construction, timber quality, flooring, roofs, doors and windows.
I sold Marina Sheds in 1990, although unfortunately I did not receive all the money I was due from the sale. By 1992 we had expanded into summer houses, garages, garden rooms and log cabins and the business became Titan Garden Buildings.
My son Craig joined me in 1992 after studying carpentry at Guildford College from 1990. His practical carpentry knowledge complemented my manufacturing and retail experience, and garden buildings became very much a father-and-son business for us.
We sold Titan Garden Buildings in 1998. In 2000 Craig and I formed 1st Choice Leisure Buildings with a different approach: rather than being tied to one manufacturer, we wanted to offer carefully selected products from quality manufacturers and give customers a genuine choice.
Today Craig runs the day-to-day business and I continue to support him and the team as required. You can read the full story on our About 1st Choice Leisure Buildings page.
What Have More Than 45 Years Taught Me About Garden Rooms?
The biggest lesson is to look beyond appearance and headline price. How are the walls constructed? What timber or cladding is being used? How substantial is the framing? What is used for the floor and roof? What doors and windows are fitted? Is it insulated, and if so, where?
Then ask yourself how you will use the building. Somebody wanting somewhere pleasant to sit during summer does not necessarily need the same specification as somebody working from the garden five days a week.
Since 1979, more than 50,000 buildings have been supplied across the UK through 1st Choice and the businesses behind our history. If those years have taught me anything, it is that there is no single garden building that is right for everybody.
What Should You Look for in a 4×3 Garden Room?
Start with construction rather than optional extras. Timber quality matters, and depending on the model our garden rooms use quality redwood or LP StrongCore cladding. Having worked with timber buildings since 1979, I would always recommend finding out what materials are actually being used rather than relying on a general description such as “timber garden room”.
Look at the wall framing, floor and roof and compare these between buildings. Doors and windows matter as well, particularly for an office. Consider the glazing, ventilation and where the windows will sit in relation to your desk.
Natural light is welcome, but more glass is not automatically better. Strong sunlight directly onto computer screens can become inconvenient, so think about orientation and furniture before deciding on the window layout.
Finally, compare what is included in the price. Installation, insulation, glazing, treatment, roof covering and other options can vary between products. A headline price is only useful when you know you are comparing like with like.
Plan Your 4m x 3m Garden Office Before You Order
If home working is the main reason for buying, plan your desk, screens, storage and other furniture before settling on the final design. Think about electrical sockets for computers, monitors, printers, lighting and heating, as well as how you will provide reliable internet access.
Depending on the building, there may be flexibility over door and window positions. Use that flexibility to make the building work around you rather than arranging your working day around an inconvenient standard layout.
Could Your Garden Room Have More Than One Use?
A 4m x 3m garden room is large enough to be useful for much more than home working. It could become an art or craft studio, hobby room, gym, music room, games room or quiet retreat.
Think ahead if you can. Today’s office may become tomorrow’s hobby room, and a teenager’s games room may eventually return to being an office. That flexibility is one of the advantages of choosing a useful size rather than a building that only just accommodates your immediate requirement.
Would a Garden Room With a Shed Be More Practical?
If your new room is replacing an existing shed, remember that the lawnmower, bicycles, tools and garden equipment still need somewhere to go. A combined garden room and storage building can solve this by keeping your office or leisure room separate from the shed section.
Explore our garden rooms with shed storage if this arrangement would work better for your garden.
Can You Have a Bespoke 4m x 3m Garden Room?
Depending on the range, there can be considerable flexibility. Selected models allow changes to dimensions, door and window positions, glazing, finishes and other details.
If 4m x 3m is approximately right but your garden needs something slightly different, or you already know where you want the doors and windows, tell us before ordering. It is much easier to create the right arrangement at the beginning than adapt an unsuitable room afterwards.
A Good Garden Room Needs a Good Base
I have been saying this for many years: a good garden building needs a good base. It should be firm, flat, level and suitable for the particular building being installed.
A poor base can cause problems that have nothing to do with the quality of the garden room itself, including doors and windows not operating correctly. Check the requirements for your chosen model before installation and tell us about narrow access, steps or other site restrictions beforehand.
Professional Garden Room Installation
Qualifying garden rooms on this page include professional assembly within the applicable delivery areas. The building is erected by people familiar with the product, provided the agreed base and access requirements are ready.
Always check the individual product page because specifications, options, installation arrangements and delivery conditions can vary between ranges.
Why I Still Recommend Seeing Garden Rooms Before You Buy
See Garden Rooms Before You Buy
The internet has made researching garden buildings much easier than it was when I started Marina Sheds in 1979, but photographs still cannot tell you everything. You cannot feel how substantial a floor is, operate the doors and windows or properly appreciate the space until you stand inside a building.
That is why I continue to recommend visiting our Surrey garden building display site if you can. Walk inside the buildings, open the doors and windows, look at the construction and imagine where your furniture will go. Compare one specification with another and ask questions.
I thought seeing a building before buying was sensible advice when I started in this industry, and I still do.
Why Buy Your 4m x 3m Garden Room From 1st Choice?
1st Choice Leisure Buildings is a family business with garden building experience going back to 1979. More than 50,000 buildings have been supplied across the UK through 1st Choice and the businesses behind our history, but experience is not simply about quoting a large number. It is about what you learn from all those buildings and customers.
Craig now runs the business day to day and I continue to support him and the team. Between Craig’s carpentry background and our practical experience of manufacturing, selling and supplying garden buildings, there is a considerable amount of first-hand knowledge behind the advice you receive from us.
If you are uncertain which building is right for you, contact us. We would rather explain the differences before you buy than have you discover afterwards that another specification would have suited you better.
Frequently Asked Questions About 4m x 3m Garden Rooms
How big is a 4m x 3m garden room?
A nominal 4m x 3m garden room has a footprint of approximately 12 square metres. Exact external and internal dimensions vary between models, so always check the individual product dimensions before planning your base or furniture.
Is a 4m x 3m garden room big enough for an office?
For most home workers, yes. There should normally be space for a proper desk, office chair, computer equipment and storage while retaining comfortable room to move around.
Can two people work in a 4×3 garden room?
Yes, with sensible planning. Two workstations can fit into many 4m x 3m layouts, although desk size, storage and door and window positions should be considered before ordering.
Should I buy a 4m x 3m insulated garden room?
If you expect to use the building regularly throughout the year, insulation should be high on your list. Compare exactly which parts of the building are insulated as well as its glazing and overall construction.
Are Platinum garden rooms insulated?
It depends on the model. Platinum Fleet and Odiham are sold as fully insulated buildings with insulated walls and roof and double glazing as standard. Insulation is available as an option on selected other Platinum models.
What is the difference between Platinum and Royal garden rooms?
Platinum offers an excellent balance of specification and price, including insulated Fleet and Odiham models. Royal is positioned as our premium garden room range. Rather than choosing on the range name alone, compare the individual specifications against how frequently and at what times of year you intend to use the room.
Can I customise a 4m x 3m garden room?
Many models offer customisation and selected buildings can be made to more bespoke requirements. Options vary but can include dimensions, doors, windows, glazing, insulation and finishes.
Does my garden room need a proper base?
Yes. A firm, flat and level base suitable for the particular building is essential. Check the requirements before installation because they can vary between models.
Is installation included?
Professional assembly is included with qualifying garden room ranges within the applicable delivery areas. Check the individual product page or ask us to confirm what is included with your chosen building.
Do I need planning permission for a 4m x 3m garden room?
Many garden rooms can be installed under permitted development rights, but this should not be assumed. Requirements depend on factors including the building’s height, position, intended use and the property itself. Listed buildings, designated land and other circumstances may be subject to additional restrictions, so check the requirements applying to your property if you are uncertain.
My Final Advice on Choosing a 4m x 3m Garden Room
After working with garden buildings since 1979, my advice is straightforward. Decide how you genuinely intend to use the room, compare complete specifications rather than photographs and headline prices, make sure the base is right and spend your money on features that will make a real difference to you.
If the building will mainly be enjoyed during warmer weather or for occasional use, you may not need the highest specification. If it is going to become your everyday workplace, a 4m x 3m insulated garden room with appropriate glazing and a specification designed for regular use deserves much more serious consideration.
Think about the future as well. One of the advantages of a 4m x 3m garden room is that it is large enough to adapt. Today’s office could become tomorrow’s studio, hobby room, gym or quiet retreat.
If you are comparing Platinum and Royal or simply cannot decide which 4×3 garden room is right for you, please ask us. Our job is to explain the differences and help you make an informed choice, not simply point you towards the most expensive building.
And if you can visit us, come and see the buildings for yourself at our Surrey garden building display site. The internet has changed how garden buildings are researched since I started Marina Sheds in 1979, but there is still no substitute for standing inside a building and examining the quality for yourself.
Robin Antill
Founder, 1st Choice Leisure Buildings
Browse our complete range of garden rooms and garden offices, compare our insulated garden rooms, read more about Robin, Craig and the history of 1st Choice Leisure Buildings, or contact us for help choosing the right 4m x 3m garden room.
From £7859
