Summer Houses

Summerhouses to use in every season


Summer houses aren’t just for summer! Our insulated summerhouses are the ideal solution for a space you can use all year round.

Green Retreats is the UK’s largest, leading garden room company offering the ideal alternative to a standard garden summer house. Since 2005, we have been creating spaces for people in their gardens for leisure and business, and for schools and large corporate organisations. There is one common theme with every customer we have built garden rooms for and this is the need for extra space. This is why the traditional take on the summer house is not the best solution for those looking to create a space that can be used all year round, but an insulated summer house from Green Retreats could be the very thing you need.


Explore our ranges of garden room building designs. At Green Retreats we have a transparent pricing policy where you can see a fully inclusive price for every building design, size and option. Click below to shop.

Starting From: £11,732

Benefits of a Green Retreats Summer House

Unique & Modern

A stylish range of designs to choose from to create a stunning feature in your home and garden.


Our luxury summerhouses are fully insulated to use comfortably all year round, no matter the weather.

Versatile Space

Much like an extension to your home, your summer house can become anything you need it to be!

Adds Value

Our quality garden room buildings can add value to your home, as well as your lifestyle.


The summer house has, over time, become a staple of the British garden landscape.

It’s important to choose a garden building for what you intend to use it for, do you want a space to use relax in for short periods in the summer or are you looking for something more robust and suitable for year-round-use? Green Retreats is proud to offer fully insulated garden rooms that “level up” the traditional summer house; a space to use all year round and not just in the warmer months.

As a quality construction, adding a Green Retreats garden room building to your property as your summerhouse can help add value to your home. Leading experts claim that a quality-built garden room can add at least 1.5x the value of the building, which means your costs would be covered.

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Design Your Building

Start creating your ideal garden room today using our online design tool. Discover and explore the range of styles, sizes, finishes we have available; plus get an accurate cost as you design.

See your garden building ideas come to life on screen, then save your design to come back and view or edit again at any time.

Also compatible with mobile and tablet devices

Go to Design Tool

Visit Our Showroom

We now have 2 showrooms! Our Westcott showroom is the largest of its kind, showcasing 17 buildings models, all varying in use and purpose. This includes Green Retreats, The Garden Office and The Annex Range. Our new Twickenham showroom showcases our 3 most popular building models and acts as a ‘hub’ closer to our London based customers.

Open 7 days a week, you can drop in whenever you please – with no appointments needed!

Our Showrooms

Finance Options

Providing flexible finance options on all of our building ranges, you can pay off your building spread over 3 -10 years with a monthly instalment plan.

Payment Process

  • £300 deposit
  • 60% at 6 weeks
  • 30% on the final day of initial construction
  • 10% on project completion

    Including electrics, plastering and other optional extras


A quality built year-round summerhouse is a great extension to your home. Being detached from the main house offers so many benefits; privacy, quiet, ample natural light and freedom to name a few!

You might have your summer house ideas already, but why not consider a hidden retreat, garden studio, garden bar or garden office! Your summerhouse is the perfect blank canvas to create a space you’ve always dreamt of.

Go to Ideas Gallery


We include everything needed to get your building up and running within your quoted price – including base/foundations, professional installation and VAT. As well as this you will receive a french sliding door set, flooring, plug sockets and much more to get you started as soon as construction finished.

We always provide a detailed and fully inclusive quote, free of charge, to every customer. This means there are no hidden costs or surprises when planning your garden room project. We’ve got it covered.


A garden room summerhouse from Green Retreats is meticulously engineered in-house by our specially trained teams. From start to finish we take care of every detail for complete quality control. Nothing is ever outsourced, and we project manage every stage for you, keeping you fully updated as we go.

We’re proud to say that our summer houses are eco-friendly! As part of our design and manufacturing process, we take careful consideration to the environment; using sustainable, recyclable and locally sourced materials whenever we can.

Contemporary Summer Houses

Our garden rooms offer a contemporary, more architectural take on traditional garden buildings. Each building can be customised to meet the criteria for those looking for a more traditional feel that still looks and feels like a summer house. Our four different styles offer a unique eternal styling as standard, which will give you a good idea on where to start when looking for a garden room building.Each of the products we offer differ only in external appearance and all are manufactured to the same quality using the same materials of the highest grade.

If you’re looking for the best alternative, then our buildings could be the ideal solution.

Luxury garden room with a modern swimming area
Year-Round Summer Houses

Generally, the walls of a summer house will use a single layer of timber with no insulation or barrier to the external weather conditions. Garden rooms from Green Retreats use five layers of market-leading materials and insulation to ensure it is as well insulated as your home to ensure you have a space you can use in all weather conditions.

You can find out more about what materials we use in our garden rooms on our manufacturing page.

Our Manufacturing Process


We don’t offer a DIY option as the nature of the construction of our buildings is more complex. That being said, depending on the size and style you choose, our specially trained staff are able to construct your garden room in just 2 to 5 days with the main structure being water-tight after the first day of construction.

You might be able to put together a garden building yourself in a day or two, but why not leave the work to us?


A garden room summerhouse from Green Retreats is meticulously engineered and fully insulated using both sustainably sourced natural materials and recyclable modern composites.

Every element of your garden room is thought about when it comes to the design and manufacturing process to ensure your space can be used throughout the year.

Whether it’s the floor, walls, roof or glass, be assured that our products use materials to ensure your space is fully insulated to achieve market-leading insulation scores, also known as U-values.

Find out more by visiting our manufacturing page…


A space to use all-year-round


When you invest in a quality garden room building from Green Retreats, you can be sure of a summer house building that is comfortable to use all-year-round.

We use premium insulation materials throughout our buildings that you’d find in new build homes, making our garden room buildings are comfortable as a room in your home! Our smart insulating layers help keep our buildings warm in winter and cool in summer.

The breathable insulation allows for the directional transfer of moisture and heat to create a healthy and comfortable environment inside. What’s more, we also use premium toughened double-glazing in our doors and windows, keeping your garden room bright, airy and comfortable.

Included in the price of every building is also a wall-mounted radiator, helping to take the wintery chill from the air in the colder months. And for total temperature control we also offer a range of optional heating and cooling upgrades, including air-conditioning!

Our Insulated Summerhouses


The next steps to ordering your summer house are easy! Our friendly Sales & Design team would love to discuss your ideas and create a design that suits your needs. We have two showrooms available for you to see the quality of our buildings for yourself as well as having access to our designers who will work with you to create a free 3d design and quote. We can also offer a free design consultation appointment, either at your home or via video call, where we can also provide a quote and design after discussing your needs. Contact us today to find out more…

Generally speaking, summer houses and garden room do not require planning permission. The design of our buildings allows them to be classed as outbuildings, and as such they can be built within your permitted development rights at your property.
In the rare occasions that you would require planning permission our teams will take care of the application process for you, giving you one less thing to worry about!

Keeping your summer house warm in winter is simple when the building is a quality construction with insulating materials throughout. Our insulation and building materials are the same as you’d find in a new build home, so heating your garden room works just the same way as heating your home. We include a radiator with every building, and this is perfectly sufficient at keep the internal space cosy in the colder winter months.

Absolutely! Our summer houses are fully insulated and built using premium materials, making them weatherproof and comfortable to use all-year-round.

We have two showrooms where you can fully experience the quality of our buildings for yourself.

Our Buckinghamshire flagship showroom has 17 garden room buildings on display, and is perfectly situated between Aylesbury and Bicester – home to the famous Bicester Village Shopping Outlet.

We also have our hub showroom at Twickenham in London, with 3 garden room buildings on show as well as our range of sample finishes as well as our unique Virtual Reality experience!

The installation of our summer house garden rooms is much quicker than you might think. We pre-assemble the sections for your design specification at our factory, ready for quick and hassle-free installation at your property. This means that installation takes only 1-5 days at your site!

Yes, a summer house building from Green Retreats is very secure. The doors and windows of our buildings come with insurance grade locks and toughened double-glazing. Our wall sections are complex and thick too, making them a no-go for unwanted access.

Living inside a summer house, garden room or any outbuilding would require building regulation approval and full planning permission. As such our buildings are not suitable to be lived in as a permanent solution. If you are looking for a tiny home or annexe then check out our range The Annex.

Summer houses are an extra living space in the comfort and practicality of your garden. When a summer house is of quality construction using premium building materials, it is more like an extension of your home than a traditional shed-like summer house. Summer houses are great spaces to relax in away from the stresses of home, with great views and fresh air in abundance.

A quality designed and built garden room summer house from a reputable company such as Green Retreats can absolutely add value to your home. Find out more about how our garden rooms can add value read our blog and expert study…

Our garden summer houses are available in over 70 size configurations, the smallest at 4sqm and increasing in half metre increments in sizes up to 30sqm internally. So, whether you’re looking to build a small summerhouse or larger garden building have a size configuration to perfectly fit your garden size or needs.

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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


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