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About Our Garden Room Insulation

Insulated Garden Room Designs

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

We use premium materials in the roof, walls, floors, and double-glazing, ensuring every Green Retreats building is crafted for year-round comfort.

Basebox

Our most cost-effective garden room building yet. Designed with form and function in mind. Self Build or Fully Installed Value-Engineered Garden Pods.

From: £9,995
Product Image Basebox Cta

G Range

G1

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Graphite Pack Graphite Pack
Black Pack Black Pack
Natural Pack Natural Pack

Traditional cabin style in a modern design with a grand hood that extends from all sides.

From: £23,790

G2

Product Image G2 Product Image G2 Product Image G2 Product Image G2
Graphite Pack Graphite Pack
Black Pack Black Pack
Natural Pack Natural Pack

Compact and contemporary with squared edges and a shallow front frame that gives a pod-style appearance.

From: £23,790

G3

Product Image G3 Product Image G3 Product Image G3 Product Image G3
Graphite Pack Graphite Pack
Black Pack Black Pack
Natural Pack Natural Pack

Stylish square-edge design with an extended front frame that creates a striking sheltered surround.

From: £23,790

G4

Product Image G4 Product Image G4 Product Image G4 Product Image G4
Graphite Pack Graphite Pack
Black Pack Black Pack
Natural Pack Natural Pack

Sharp and architectural with a forward-leaning front frame that creates a dynamic statement design.

From: £24,955

G5

Product Image G5 Product Image G5 Product Image G5 Product Image G5
Graphite Pack Graphite Pack
Black Pack Black Pack
Natural Pack Natural Pack

Curved corner detail that joins a sheltered hood and enclosed side to create a distinctively different design.

From: £24,955

Other Buildings By Green Retreats

X1 by Green Retreats

Luxury driven design

Elevate your outdoor living experience with the epitome of luxury.

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

Housing by Green Retreats

A complete living solution for your home

The perfect living space in your garden

The Annex Range from Green Retreats is our collection of tiny homes. Designed for full-time living; including building regulations approval, kitchen and bathroom.

The Annex

Product Image Annex
From: £81,745

 

Launch Offer | £3,000 Voucher Towards Your Garden Room*

The A Range is here! Enjoy limited-time discounts across our garden room collection. Upgrade your outdoor space today!

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 garden office pod

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

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.

Garden guest room

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!

Garden room with composite cladding

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

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 putting green

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.

Insulated Garden Room in 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.

modern garden studio in London

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

Insulated Garden Room Gallery

Real Customer Projects

Get inspired for your insulated garden room project!

Benefits Of A Insulated Garden Room

WHO WE’VE WORKED WITH

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

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.

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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