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Insulated Garden Room Designs

Every building from Green Retreats comes fully insulated as standard, with heating included too!

G-Range

From £23,790

A-Range

From £30,995

Basebox

From £9,995

The Annex

From £81,745

G-Range

Our core garden room range, manufactured using only the highest-quality materials from sustainable sources

A-Range

Reach new heights with our apex roof garden rooms, where style and space soar.

Basebox

Our most cost-effective garden room range, designed and built with form and function in mind.

X1

The X1 garden room by Green Retreats has been infused with luxury from inception and embedded in every detail.

The Annex

Our collection of tiny homes, designed for full-time living; including building regulations approval, kitchen and bathroom.

Insulated Garden Room Gallery

Real Customer Projects

Get inspired for your insulated garden room project!

About Our Garden Room Insulation

Benefits Of A Insulated Garden Room

What are insulated Garden Rooms?

All garden rooms from Green Retreats come fully insulated and double-glazed as standard, including heating for added comfort.

Built with high-quality insulation in the walls, roof, and floor—similar to what’s used in new-build homes—our rooms stay warm in winter and cool in summer. Energy efficiency is taken care of, leaving you to enjoy your extra space all year round.

Find out more about our building insulation

Side-by-side comparison of a modern garden studio in two seasons. The left half shows a winter scene with frosty grass, bare trees, and cool-toned lighting, while the right half displays a summer scene with lush green grass, leafy trees, and warm-toned lighting. The wooden studio features large glass doors, a sleek design, and surrounding garden elements like potted plants and a wooden swing.
Top 3 Insulated Garden Room Uses
A small garden office pod with a set of open french doors showing off the interior design which consists of light walls, a rug and plants.

1. Garden Offices

Insulated garden offices create a productive work environment to focus, free from household distractions. With excellent insulation, you’ll stay comfortable year-round. Personalise your space to perfectly suit your work-from-home or small business needs.

home garden gym with state of the art exercise equipment. the building has 2 sets of open bifold doors on each side showing off the inside.

2. Home Gym in the Garden

Reach your fitness goals in a peaceful, private and personalised space. Our insulated garden rooms provide ample light, ventilation, space and privacy, making them the perfect space to create a gym at home.

Medium size Garden guest room with an open set of bifold doors. It is surrounded by greenery and plants

3. Garden Guest Room

Perfect for overnight guests, a fully insulated garden room is a comfortable, private accommodation option. Heating, lighting and premium insulation are all included as standard, so all you need to do is add furniture to create a welcoming space for family and friends.

Why is Green Retreats the UK’s favourite Garden Room Company:

Eco-Friendly & Sustainable

Green Retreats is the eco-friendly choice! As a carbon-neutral company, we plant five trees for every one used. And for our garden room buildings, the energy-efficient insulation protects the environment while saving you money!

A large Garden room covered in black composite cladding and has bifold doors. there is a seating area on the patio just outside

Family-Run Since 2005

Since 2005, we’ve been helping our customers grow their homes with insulated garden rooms. We’re tried and tested and remain the UK’s favourite. And we’re very proud!

Installation team for Green Retreats sat on the decking of a building they have just installed.

12-year guarantee

All of our insulated garden rooms come with a comprehensive 12-year guarantee, giving you that extra peace of mind for a lasting investment to your home.

Modern garden office with and left hand canopy

Engineered For Year-Round Use

Every building from Green Retreats is fully insulated for comfortable use all year round. Cavity insulation, double-glazing, and heating are included as standard.

medium Insulated Garden Room in a cold garden during winter

Designed and built in the UK

Every element of our insulated garden rooms is designed and manufactured in-house at our state-of-the-art manufacturing facilities in the UK.

a modern garden studio in a London garden

UK’s Largest Garden Room Showroom

We have two showrooms for customers to experience the quality of our buildings for themselves! Including the UK’s largest garden room showroom in Buckinghamshire near Bicester Village.

green retreats buckinghamshire showroom

Add Value to your Home

Our insulated garden rooms have been proven to add value to your home, as much as 5-15%! Our buildings are a lasting investment to your home and lifestyle.

interior of a luxury garden office

Backed by TV’s Kevin McCloud

Architecture guru and BAFTA award-winning presenter Kevin McCloud has chosen to work with Green Retreats due to our commitment and shared passion for quality design, innovation and sustainability in the construction industry.

Kevin McCloud outside garden room

Our Showrooms

See the quality of our insulated garden rooms for yourself by visiting one of our showrooms! Choose from our flagship showroom in Buckinghamshire with 20 garden rooms to see or our hub showroom in Twickenham with 4 garden rooms on display.

Visit the showroom for £200 off your order

Our Showrooms

A lookbook of our insulated garden rooms to inspire your project

Request a brochure

Trustpilot

What our customers say

We are so pleased to be top rated on Trustpilot
by our customers.

Insulated Garden Room FAQs

The great news is that planning permission is generally not required for insulated garden rooms! Insulated garden rooms are classed as ‘outbuildings’, which fall within your permitted development rights. Some properties and areas in the UK don’t have permitted development rights, in which case planning permission would be required. We can help with the planning application process on your behalf should you need it, taking care of the hassle for you.

Yes! All of our garden rooms are fully insulated to use all year round. Our premium-grade insulation helps regulate the temperature of your garden room to keep you warm in the winter and cool in the summer.

Absolutely! Independent property experts have calculated that quality insulated garden rooms can add between 5-15% on your property value! In addition, Luke Jackson, a property expert, noted: “With remote working now so common, buyers’ priorities have shifted. An insulated garden room, separate from the main house, can now be the deciding factor in closing a property deal.” Find out more about how garden rooms add value to your home

The cost of insulated garden rooms will depend on the size, model and additional options and upgrades you choose. Fully insulated buildings start from £9,860 for a self-build garden room or £11,725 for a fully installed building. We’re transparent about our costs, giving customers a complete quote with no hidden extras, completely free of charge with every design. We’ve also listed out all of the costs for your project to help you in your early stages with our article called How Much is a Garden Room.

Our insulated garden rooms are designed to keep your valuable work equipment safe when you’re finished for the day!

The insurance-grade doors and windows keep your garden office secure. The premium double glazing is designed to withstand considerable shock compared to traditional options.

Insulated garden rooms are built using the same high-quality materials you would find in most new-build homes, making them as warm and comfortable as a room in your home. Every building from Green Retreats comes with a wall-mounted radiator included in the price as standard, helping to keep you warm and toasty in the winter months.

Insulated garden rooms are designed for all-season use, providing comfort in any weather. Rain or shine, they offer a cosy, dry space in the winter and a cool, refreshing environment during the summer.

The lower the u-value the better a material is at reducing thermal transfer, so keeping the heat in and the cold out! We have these measurements for our individual materials to give you an idea of just how efficient our buildings are! Each building is custom made to your specification (size, number of windows etc) so the total u-value of each building will differ. However, because we use premium materials to keep our insulated garden rooms warm you won’t need to worry about feeling the outside elements.

Proper insulation is important if you plan to use a garden room all year round. It helps keep the space comfortable in both summer and winter, making it suitable for a range of uses – like a home office, gym, studio, or chill-out space.

Garden rooms can be enjoyed all year round – even through the colder months – with the right features in place. Our high-quality garden rooms come supplied with a wall-mounted heater as standard, making it simple to stay warm and cosy during winter.

Well-insulated walls, floors, and roofs – using materials such as Rockwool – play a key role in keeping the space comfortable by helping to retain heat. For particularly cold nights, it’s a good idea to keep your heater on a low setting overnight to maintain a steady temperature and avoid any chill setting in.

Garden rooms are perfect for occasional use, so the odd overnight stay – whether it’s a guest visit or a fun sleepover – is usually no problem at all.

With full insulation and heating included as standard, these spaces are warm, cosy, and comfortable throughout the year. However, most garden rooms aren’t intended or approved for full-time residential living. If you’re planning to use one as permanent accommodation, you’ll likely need to explore planning permission and meet specific building regulations.

WE ARE PROUD TO HAVE WORKED WITH

As the UK’s leading garden room company, Green Retreats are proud to have been featured in many national publications.

Case Studies & Ideas

Looking for some inspiration for your insulated garden room? Take a look at what some of our customers have done with their Green Retreat.

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Building Measurements

You can get a great idea of how your new garden office will look by using the 360 degree rotating viewer.

Also compatible with mobile and tablet devices

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Design Your Building

Start designing your garden room today using our online Visualiser tool. You’ll be able to choose your style, size, finishes and get an accurate cost.

Design Your Building

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