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Home » Garden Rooms & Offices » Insulated Garden Rooms

Insulated Garden Rooms

Comfortable insulated garden rooms that stay warm in winter and cool in summer — perfect for year-round work, relaxation, or hobbies.

Free Installation Option
Toughened Glass
Bespoke Option
Coloured Paint Option
Insulation Options
Base Building Option
Insulated Garden Room Showroom
Wooden Floor & Roof
Double Door Option
Apex or Pent

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1st Choice – Known For Quality – Loved For Design
★★★★★Trustpilot ReviewsWhiteSpark Feedback

Interior insulation lining options for garden room, including horizontal T&G, MDF, vertical T&G and insulated ply.
HELP WITH PRICES? CLICK HERE FOR OUR ONLINE QUOTE FORM.

All of our insulated garden rooms are made from redwood deal (not cheap whitewood) or LP® StrongCore™ cladding . Available in sizes from 8×6 right up to 28×16. Bespoke designs available. Double glazing and insulation on Royal models. Free site surveys. Base building service. VIEW at our garden rooms display site, near Guildford, Woking and Ripley in Surrey.

Building Type

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Sizes (Any Size Made)

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Insulation Options

Showing 1–28 of 35 results

  • Platinum 6x8 Apex Fleet Garden Room with large windows and a sloping roof.
    £4,931 Fully Insulated 6ft x 8ft (Also, sizes up to 14ft deep)
    Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall UPVC Doors & Windows Option Colour Treatment option

    Platinum 6×8 Apex Fleet...

    Platinum 6×8 Apex Fleet...

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  • A wooden Platinum 8x6 Pent Odiham Garden Room with double doors and windows. Perfect for garden storage or office.
    £4,757 Fully Insulated 8ft x 6ft (Also, sizes up to 20 x 6) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Colour Treatment options Optional UPVC Doors & Windows

    Platinum 8×6 Pent Odiham

    Platinum 8×6 Pent Odiham

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  • A green Platinum 8x8 Pent Odiham Garden Room with an open door and window. The shed is in a well-manicured garden.
    £5,435 Fully Insulated 8ft x 8ft (Also, sizes up to 20 x 8) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Colour Treatment options Optional UPVC Doors & Windows

    Platinum 8×8 Pent Odiham...

    Platinum 8×8 Pent Odiham...

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  • Platinum 6x10 Apex Fleet Garden Room with open doors and windows
    £5,709 Fully Insulated 6ft x 10ft (Also, sizes up to 14ft deep)
    Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall UPVC Doors & Windows Option Colour Treatment option

    Platinum 6×10 Apex Fleet...

    Platinum 6×10 Apex Fleet...

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  • A green Platinum 6x12 Apex Fleet Garden Room with open white doors and windows, surrounded by plants and trees.
    £6,257 Fully Insulated 6ft x 8ft (Also, sizes up to 14ft deep)
    Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall UPVC Doors & Windows Option Colour Treatment option

    Platinum 6×12 Apex Fleet...

    Platinum 6×12 Apex Fleet...

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  • A Platinum 10x10 Pent Odiham Garden Room with double doors and windows. Made in Britain
    £6,969 Fully Insulated 10ft x 10ft (Also, sizes up to 20 x 10) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Colour Treatment options Optional UPVC Doors & Windows

    Platinum 10×10 Pent Odiham...

    Platinum 10×10 Pent Odiham...

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  • A wooden Platinum 12x12 Pent Odiham Garden Room with double doors and windows. Made in Britain
    £8,565 Fully Insulated 12ft x 12ft (Also, sizes up to 20 x 12) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Colour Treatment options Optional UPVC Doors & Windows

    Platinum 12×12 Pent Odiham...

    Platinum 12×12 Pent Odiham...

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  • Special Deals A black Royal Bletchley pent 8x6 garden room with a glass door and two windows, surrounded by flowers and trees.
    £7,849 Fully Insulated 8ft x 6ft (Also, sizes up to 20 x 6) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Bletchley 8×6 Garden...

    Royal Bletchley 8×6 Garden...

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  • A dark grey garden shed with a double door and two windows, set in a beautiful garden with flowers and trees.

    Royal Bletchley 8×6 Garden...

    Royal Bletchley 8×6 Garden...

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  • Special Deals A blue Royal Buckingham 10x6 Garden Room with large windows and a flat roof
    £7,859 Fully Insulated 8ft x 6ft (Also, sizes up to 20 x 6) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Buckingham 8×6

    Royal Buckingham 8×6

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  • Special Deals Royal Denham Garden Room with cream-coloured walls, black trim, and glass double doors, surrounded by plants and flowers.
    £7,269 Fully Insulated 8ft x 6ft (Also, sizes up to 20 x 6) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Denham 8×6 Garden...

    Royal Denham 8×6 Garden...

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  • Special Deals Royal Marlow Garden room with large glass doors and white walls. Made in Britain.
    £7,849 Fully Insulated 8ft x 6ft (Also, sizes up to 20 x 6) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Marlow 8×6 Garden...

    Royal Marlow 8×6 Garden...

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  • Special Deals A grey Royal Bletchley pent garden room with a black door and windows. A beautiful garden surrounds the shed.
    £9,019 Fully Insulated 8ft x 8ft (Also, sizes up to 20 x 8) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Bletchley 8×8 Garden...

    Royal Bletchley 8×8 Garden...

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  • Special Deals Black Royal Buckingham 10x6 Garden Room with glass doors and a flat roof, surrounded by garden
    £9,009 Fully Insulated 8ft x 8ft (Also, sizes up to 20 x 8) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Buckingham 8×8

    Royal Buckingham 8×8

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  • Special Deals A modern Royal Denham Garden Room made in Britain with a black roof and double doors.
    £8419 Fully Insulated 8ft x 8ft (Also, sizes up to 20 x 8) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Denham 8×8 Garden...

    Royal Denham 8×8 Garden...

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  • Special Deals A green Royal Marlow Pent 8x8 Garden Room with large glass doors and windows
    £8,999 Fully Insulated 8ft x 8ft (Also, sizes up to 20 x 8) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Options

    Royal Marlow 8×8 Garden...

    Royal Marlow 8×8 Garden...

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  • Special Deals A green Royal Bletchley pent garden room with a white roof and paved path leading to the door. The shed has a window and a door.
    £11,124 Fully Insulated 10ft x 10ft (Also, sizes up to 20 x 10) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Bletchley 10×10 Garden...

    Royal Bletchley 10×10 Garden...

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  • Special Deals A Royal Buckingham 10x10 Garden Room with glass doors and windows, surrounded by a well-manicured lawn and garden.
    £11,409 Fully Insulated 10ft x 10ft (Also, sizes up to 20 x 10) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Buckingham 10×10

    Royal Buckingham 10×10

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  • Special Deals A Royal Marlow garden room modern garden room with large glass panels and a door. A green barrel sits to the side.
    £11,399 Fully Insulated 10ft x 10ft (Also, sizes up to 20 x 10) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Options

    Royal Marlow 10×10 Garden...

    Royal Marlow 10×10 Garden...

    View Product
  • Special Deals A blue Royal Denham Garden Room with a black roof and trim. The shed has a glass sliding door.
    £10,429 Fully Insulated 10ft x 10ft (Also, sizes up to 20 x 10) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Denham 10×10 Garden...

    Royal Denham 10×10 Garden...

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  • Special Deals Royal Bletchley pent garden room with cream coloured walls and brown trim. The shed has a glass door and window.
    £13,429 Fully Insulated 12ft x 12ft (Also, sizes up to 20 x 12) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Bletchley 12×12 Garden...

    Royal Bletchley 12×12 Garden...

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  • Special Deals Royal Buckingham 12x12 Garden Room with large windows and a patio area. The room is made of dark wood and glass.
    £14,304 Insulated 12ft x 12ft (Also, sizes up to 20 x 12) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Buckingham 12×12

    Royal Buckingham 12×12

    View Product
  • Special Deals A modern black Royal Denham Garden Room with large windows and wooden interior, surrounded by lush greenery and flowers.
    £13,324 Fully Insulated 12ft x 12ft (Also, sizes up to 20 x 12) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Denham 12×12 Garden...

    Royal Denham 12×12 Garden...

    View Product
  • Special Deals 12x12 Royal Marlow Brown garden room with black trim and large windows
    £13,999 Fully Insulated 12ft x 12ft (Also, sizes up to 20 x 12) Free Assembly & Delivery* Double Glazed as Standard UNDER 2.5m Tall Choice of Colours UPVC Doors & Windows Apex Roof Option

    Royal Marlow 12×12 Garden...

    Royal Marlow 12×12 Garden...

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  • Special Deals A blue garden shed with wooden steps and glass doors. A garden surrounding the shed.
    From £7849
    8x6 to 20x12
    2.4 x 1.8m to 6.0 x 3.6m
    Free Assembly
    Colour Paint Finish Option
    Fully Insulated

    Royal Marlow Garden Room

    Royal Marlow Garden Room

    View Product
  • Special Deals A green garden summerhouse with white trim and doors open to show the interior. The shed is surrounded by a beautiful garden.
    From £4931
    8x6 to 16x12
    2.4 x 1.8m to 4.8 x 3.6m
    Free Assembly
    Colour Paint Finish Option
    Fully Insulated

    Platinum Apex Fleet

    Platinum Apex Fleet

    View Product
  • Special Deals A garden shed with cream-coloured walls and double doors.
    From £7269
    8x6 to 20x12
    2.4 x 1.8m to 6.0 x 3.6m
    Free Assembly
    Colour Paint Finish Option
    Fully Insulated

    Royal Denham Garden Room

    Royal Denham Garden Room

    View Product
  • Special Deals A dark grey garden shed with a double door and two windows, set in a beautiful garden with flowers and trees.
    From £7869
    8x6 to 20x12
    2.4 x 1.8m to 6.0 x 3.6m
    Free Assembly
    Colour Paint Finish Option
    Fully Insulated

    Royal Bletchley Garden Room

    Royal Bletchley Garden Room

    View Product
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Image of Garden room with shed
image of painted garden room
image showing insulated garden room
image showing garden room - offices range

View More Insulated Room Images
Horizontal T&G Lining
Shows image of garden buildings insulated with horizontal T&G boards
MDF Lining & Insulation
Shows image of garden buildings insulated with MDF boards boards
Vertical T&G Lining
Shows image of garden buildings insulated with vertical T&G boards
Insulated Ply Lining
Shows image of garden buildings insulated with plywood boards
Click on images below to see larger versions of insulated garden rooms
image of image of Royal Apex strongcore outdoor office shed
image of interior of Royal insulated garden room
image showing of Royal pent bespoke garden room
image of Regent Luxury pent garden room office
Click on images below to see larger versions of painted garden rooms
image of Regent painted bespoke office building
image of Regent apex garden office shed
image of Regent green coloured luxury garden room office
image of Regent pent coloured garden building

What Is An Insulated Garden Room?

Imagine transforming your garden into a space that truly feels like home—an inviting retreat that adapts to every need. Your garden is the perfect place for a standalone building, whether you’re seeking an insulated garden office for comfort and privacy or an ideal guest room for a cosy retreat. These versatile spaces offer countless possibilities and welcome additions to any home.

These specially constructed rooms include professionally installed insulation to protect them from the best and worst of the British climate.

Place order Let Us Help With A Free Quote

Experience the ultimate comfort as insulated garden rooms keep you warmer than your living room during frosty winter mornings. In the summer, they remain cool and refreshing, turning into your personal oasis even on the hottest days. These spaces offer homeowners the flexibility to enjoy functional additional space without the hassle of extensive renovations.

Subsequently, they are cosy and secluded outdoor spaces ideal for entertaining or working any time of year, a welcome addition to most people’s homes. Adding the coloured paint stain option also transforms the appearance.

What Are The Benefits Of Insulated Garden Rooms?

There are as many benefits to an insulated garden room as you could want. For one, they provide exceptional comfort in all seasons. In winter, the cold and rain stay outside where they belong.

In summer, you can shelter from the pulsating sun and heat while enjoying the sights and sounds of nature.

Furthermore, they are energy-efficient and eco-friendly. The insulation means you’ll never need to spend as much as you might on heating or cooling the room. In fact, an insulated garden room can use up to 30% less energy compared to converting a spare bedroom. This significantly cuts your electricity bills and reduces your carbon footprint, making it a smart and sustainable choice.

Finally, insulated garden rooms are endlessly versatile. They can become the ideal home garden office with a desk and a laptop, or an easy chair can transform them into a relaxation and meditation space.

Alternatively, it can become a home office, gym, guest room, or family hangout where you watch films or sports or chat in the most pleasant surroundings.

Should I Buy A Pre-insulated Building or Add Insulation Myself?

When it comes to insulation, precision is key—one mistake can undermine its effectiveness. While DIY can be a source of pride for a weekend warrior, consider weighing that against the security of a professional installation with a quality guarantee. Which feels safer to you?

Opting for professional installation is more like buying risk insurance, ensuring your investment is well-protected without dismissing the appeal of a hands-on approach.

Choosing a pre-insulated garden room means choosing a high standard of insulation work, saving you time and money. With professional installation, you can be confident in the comfort and quality of your new space, giving you peace of mind and the best value for your investment.

Whether you do it yourself or have someone else do it is up to you. However, for clarity, it makes sense to leave it to professionals.

It may seem like a better value to do the work yourself, but buying the summerhouse pre-insulated will guarantee a job done to industry standards—and repairs to the insulation, if necessary.

Adding the insulation after-market will inevitably take up much of your time and effort, which could be better used elsewhere. So, while we reiterate that the choice is yours, we have an opinion on this matter and believe it is better to let the pros handle the work.

Where Can I See These Buildings?

To explore the range of bespoke garden rooms you could enjoy this summer or any time of year, we invite you to visit our showroom. This way, you can experience the quality and options firsthand. For more information call us at 01483 237550. We’re more than happy to assist you!

A fully insulated garden room, with installation, can transform your outdoor space and add something to your home life that you can’t get any other way. Check out 1st Choice Leisure Buildings for an all-year-round garden room you’ll love.

There’s no better time to invest in a high-quality, secure, and energy-efficient insulated garden office with electricity designed to fit your garden perfectly. As the first autumn chill approaches, imagine having a warm, comfortable space where you can work from home without the discomfort of cold weather creeping in. Act now to ensure your office space is ready, offering the perfect blend of functionality and cosiness. The extra office space will be beneficial when working from home.

You can also visit our showroom between Woking, Ripley, and Guildford in Surrey to see and try out a few different options. Call us on 01483 237550 to find out more and arrange for more help.

Are There Any Other Options Other Than DIY Insulation? And HOW Much Will It Cost

With 45 years of experience in the timber garden building industry, we offer an optional insulation service for all our Platinum range of buildings, where they are both insulated and lined. We’ve insulated countless rooms nationwide, from coastal Devon to windy Scotland, showcasing our expertise across varied climates and conditions. By taking this option, your new garden building can be used all year round, not just in the warmer months.

The building would be insulated with foil-backed insulation, which helps maintain a more consistent temperature inside. To suit your needs and requirements, you can choose from internal claddings such as plywood, board, or T&G. Internal timber trims are added to ensure an excellent cosmetic finish.

Is It Included – Or Is It Expensive To Add Insulation To My Garden Building?

On the Royal order form insulation is included. On the Platinum order form, you can see the cost of the insulation, allowing you to decide before ordering whether it will be cost-effective for you. We can also insulate the floor, but please call to obtain the cost. You can use your new garden building all year round by deciding on the lining and insulation option.

However, all Royal garden office rooms come fully insulated as standard with no extra charge. Likewise the Platinum Fleet and Odiham garden rooms include the cost of insulation.

How much better would that be for you? Only you can decide. But it will make it an even more attractive proposition when the weather is better. Picture yourself wrapped in a soft blanket, sitting in your insulated garden room, a steaming cup of coffee in hand, as the gentle sound of rain patters against the roof. It’s your personal oasis, a space where you can read that novel you’ve been meaning to start or simply unwind with your thoughts. How you use these extra days and hours is up to you, but taking some ‘me’ time is worth it. It will take a little while to decide if this is an excellent opportunity for you – a great leisure building for all the family.

Place order Let Us Help With A Free Quote

Image of Garden room with shed
image of painted garden room
image showing insulated garden room
image showing garden room - offices range

Frequently Asked Questions Insulated Garden Rooms

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  • Can I use an insulated garden room for more than just an office (studio, gym, hobby room) in Guildford?
    Absolutely. That’s one of the main benefits. With insulation and proper finishes, the room becomes versatile: gym, hobby room, art studio, guest space (depending on planning/regs) — you’re not limited to “just an office”.
  • Do I need building regulations approval for an insulated garden room?
    It depends on size, use and proximity to boundaries. For example, if it’s under 15 m² and not for sleeping, you may not need to comply with full building regulations. If you’re over 30 m², or using it as a living space (bedroom, etc), then yes, you’ll need full compliance.
  • Do I need to worry about maintenance of the insulation or the garden room structure in the Surrey climate?
    Yes - while insulation itself is usually out of sight, you should check doors and windows for draughts, ensure the building remains watertight, and that the base remains level. Over time, if conditions shift (wet ground, tree roots), it can affect how well the insulation works, especially in a Surrey garden with clay soil or heavy rainfall.
  • How does insulation affect the resale value of my house in Surrey when I add a garden room?
    Good question. A well-insulated, well-built garden room adds usable space, which buyers value — especially in Surrey, where gardens and flexible home space matter. If it's done to a high standard, it helps your home feel more modern and adaptable.
  • How long will the installation take once we decide on the insulated garden room?
    Once you’ve got the base ready and agreed on the final design, many insulated garden rooms can be assembled in a few days. If you add extras (electrics, glazing, partitions), it might take a week or so — but it’s still much faster than a full extension.
  • How much will it cost to heat an insulated garden room in Surrey in winter?
    While every situation is different (size, insulation level, local temperatures), a properly insulated garden room means your heating stays efficient. Because the insulation holds the heat, your running costs are lower than in an uninsulated outbuilding. It’s worth asking the supplier for a running cost estimate based on local conditions.
  • What insulation should my garden room have to stay comfortable all year in Surrey?
    A well-insulated garden room will have proper insulation in the floor, walls, and roof, not just basic cladding. You want materials that keep the heat in during chilly Surrey winters and stop it from getting too uncomfortable in summer. Ask for the specification (U-values, etc) so you know it isn’t just “wood shed” quality.
  • What kind of base or foundation does an insulated garden room require in Surrey gardens?
    A solid, level base is crucial. Whether you opt for a concrete slab or timber raft system, the base supports the weight and ensures the insulation performs properly (avoiding damp, stability issues). For clay soil around Guildford, you’ll want something reliable.
  • What should I ask a garden room supplier about insulation and build quality before buying?
    Here are three good questions:
    * What are the U-values or insulation specifications for the walls, roof and floor?
    * What base/foundation do you recommend here in Surrey/Guildford, given our soil type?
    * Are the finishes rated for year-round use (winter and summer), and will the room be ready for immediate use (i.e., no additional insulation work required after installation)?
    Asking these helps you avoid discovering later that you’ve got a “summer use only” building.
  • Will a fully insulated garden room really be warm enough for a home office in winter?
    Yes — if it’s done right. With insulation all round, decent doors and windows, and a small heater, you’ll get comfort similar to an indoor room. Many Guildford and Surrey homeowners use theirs for full-time work once the insulation is sorted.
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