20 x 10 Summerhouse
If you’re looking for an upgrade from a 16 x 8 summerhouse, then you’ll be pleased to have found our largest model - our 20 x 10 summerhouses. If you really want to make the most out of your available garden space and budget without breaking the bank, then a 20 x 10 summerhouse could be for you.
Available across traditional apex and reverse apex designs, this range of our largest summerhouses on the market is sure to make you fall in love. Offering a premium in utility, these multi-functional garden buildings are perfect for hobby rooms, entertaining, and even occasional guest accommodation without having to fork out for an extension.
For a luxury summer house, think about investing in a weather-resistant BillyOh 20 x 10 model. And for more, check out our ultimate guide to summerhouses.
Find a Summerhouse size that fits
Not sure what size is best? Check out our summerhouse buying guide
Types of Summerhouse
FAQs
Our wooden buildings are guaranteed for 10 years against rot, decay and insect infestation. Good maintenance can see these buildings last many years longer than the guarantee.
If you buy a pressure treated summerhouse, the guarantee is extended to 15 years. Pressure treatment is a process where wood preserver is forced deep into the timber by a high-pressure machine. The preservative protects the wood from rot and insects, keeping it healthier and stronger for longer.
Traditional summerhouses are perfect for lounging in the garden, keeping you cool on a hot day, and allow you to continue enjoying your outdoor space even if it rains.
As an extra room, summerhouses can also be used for other activities, especially those that come with thicker walls. Some models can be used as a garden office, for instance.
You will find even more potential from a large summerhouse. If you have the space to spare, be sure to check out our larger size options.
For more inspiration, check out our summerhouse ideas guide.
Traditionally, summerhouses are designed as sitting areas for enjoying the garden during the warmer half of the year. They also provide a way to enjoy your garden during rain or cold winds.
While many models have thin walls, meaning they do not hold onto heat through the colder months, a log cabin summer house offers an alternative if you're looking for a room to use for more of the year.
The size of your summer house will depend on what you plan to use it for and how much space you have. Remember that additional buildings need to take up less than half your garden, in order to avoid the planning permission legal process. You can find out more about that in our guide to summerhouse planning permission.
One of the most popular sizes is a 12x8 summerhouse (measured in feet, equating to about 3.6 x 2.4 metres). This size provides ample room for it to be used as a relaxing family lounge area, a garden office, a garden gym, or a host of other purposes.
The best approach is to decide where you would like the summerhouse to stand in your garden and measure the width and length of that space with a tape measure. This will give you an idea of the size range you should be looking at.
Usually, no. Most UK properties are allowed summerhouses as 'permitted developments' with no planning permission required.
Exceptions (where you MIGHT need planning permission) include:
- Listed properties and locations of 'outstanding natural beauty'
- Summerhouses placed forward of the front wall of your house (e.g. in the front garden)
- Total building works taking up more than 50% of the garden space
- An eaves height over 2.5 metres
- An overall height over 4 metres for a dual-pitched roof (apex or reverse apex), or over 3 metres for any other roof (such as pent)
- An overall height over 2.5 metres where any part sits within 2 metres of a boundary
Our summerhouses are built within the standard permitted-development height limits — just note that the 2.5-metre overall cap applies if you site one within 2 metres of a boundary, so bear that in mind when positioning it. There are some other rules, so check out our guide to planning permission for summerhouses to get the full picture.
Most summerhouses are provided as panel-based building kits that are designed to be easy to assemble with ordinary DIY tools. Each summerhouse kit has instructions provided, but here is the basic process:
- Place the floor bearers
- Lay tongue & groove floorboards on top of the floor bearers.
- Fit the bottom rails and erect the wall panels.
- Insert the window glazing and secure with beading. (Additional silicone sealant recommended.)
- Position the roof gables and purlins.
- Fix the roof boards.
- Felt the roof.
- Attach the doors.
- Enjoy your new summerhouse!
Note: The building experience is different with a log cabin style summerhouse.
Summerhouses need to stand atop a solid, level base to ensure stability, prevent ground water damage, and extend the life of the building. Do not build directly onto soil, grass, mulch or loose gravel. A poor base can lead to warping, misaligned doors, or structural issues over time. Not sure which type you need? Read our guide on how to choose the best summerhouse base for expert advice.
Why Choose Our Garden Summerhouses?
If you are looking for the perfect summerhouse, we offer a huge range of great-value garden buildings that don’t compromise on quality. Built to last and designed to blend seamlessly into your outdoor space, our wooden summerhouses are crafted using high-quality timber that provides both durability and a natural aesthetic.
Explore Our Range of Summerhouses
Not sure which style is right for your garden? Browse our dedicated collections to find exactly what you need:
- Corner Summerhouses: Tucks neatly into the boundaries of your garden to maximise your lawn space.
- Insulated Summerhouses: Fully lined and insulated garden rooms, ideal for year-round use as an office or studio.
- Cheap Summerhouses: Budget-friendly options that deliver exceptional quality at an accessible price.
- Pent Summerhouses: Featuring a sleek, single-sloped roof for a more contemporary garden style.
The GBD Guarantee
- Durable Timber Construction: Manufactured by garden building experts with decades of experience, each of our summerhouses for sale is built with strong timber that carries a 10-year guarantee against rot, decay and insect infestation. This extends to 15 years on pressure treated models.
- Affordable Prices: Get the best value for your money, with summerhouses that are affordable yet built to withstand the British weather.
- Functional and Stylish Designs: Whether you need extra storage, a peaceful garden retreat, or a space to entertain, our designs are practical and attractive.
- Trusted Expert Designers: Established for over 25 years as a leading British manufacturer.
Customisable Wooden Summerhouses
While our summerhouses are designed with affordability in mind, we offer a range of customisation options to ensure your new garden building fits perfectly with your style and space. From optional windows and doors to colour finishes, you can make your summerhouse uniquely yours without overspending.
- Customise Your Door and Window Positions: On select models, choose which side to place the entrance to match your garden's layout.
- Stain or Paint Options: We offer a variety of finishes to protect your timber and complement your garden’s existing décor.
- Add Optional Features: Enhance your summerhouse with extra features like heavy-duty roofing, shelving, or guttering for an even more enjoyable space.
Delivery Information
We deliver our summerhouses free to most of Great Britain. Delivery charges apply to addresses furthest away from our headquarters in Nottinghamshire, and additional charges will apply to our heavier log cabin summerhouses due to the mass of the individual interlocking logs. You can see a full breakdown of whether delivery charges will apply to you on our delivery information page.
Summerhouse Buying Information & Finance
Still deciding? Read our complete summerhouse buying guide for tips on sizing and styles, or speak directly with our UK experts on 01909 768840.
Don’t forget that you can also buy your summerhouse on finance, thanks to our partnership with Novuna. You’ll find all the information below the ‘Add to basket’ section on the product page. As long as your purchase is at least £560 and with a minimum deposit of 10%, finance is available for up to 48 months. For the full terms and conditions, please read our finance page.
Start Your Garden Transformation Now
Ready to enhance your outdoor living space with a premium but affordable summerhouse? Browse our full collection above and find the perfect wooden building for your home. Order online now and get started on creating a beautiful, functional garden retreat at a price that suits your budget.