Garden Summer Houses
Browse our full range of garden summer houses, designed and manufactured here in the UK. Because we sell direct from our own factory, you get British-made quality without the retail markup—from affordable summer houses for traditional relaxation log cabin summer houses built for use across more of the year.
A summer house gives you a sheltered spot in the garden to enjoy whatever the British weather is doing—somewhere shaded and cool when there's a heatwave, and dry and out of the wind when there isn't. Every BillyOh summer house is built from tongue & groove timber and backed by a 10-year anti-rot guarantee, extended to 15 years with pressure treatment. Browse our full range below and keep reading for help choosing the right model for your garden.
FAQs
Damp in a summerhouse is almost always caused by trapped moisture with nowhere to escape, so the key is ventilation. Open windows and any vents on dry days to keep air moving, and avoid storing damp items inside. Raising the building on a level base with good drainage stops moisture rising from the ground, and leaving a small gap around furniture so air can circulate behind it helps too. If you still notice condensation in the colder months, a small dehumidifier will pull the remaining moisture out of the air.
The most effective ways to keep a summerhouse cool are shading and ventilation. Position it so it isn't in direct sun all day, use blinds or curtains on sun-facing windows, and keep windows and any vents open to let warm air out. Planting or a parasol nearby can shade the roof during peak afternoon heat. Insulation is also effective at reducing heat transfer in both directions, but adding internal insulation is a structural modification that can affect your guarantee, so we'd recommend the shading and ventilation methods above rather than altering the building itself. If you want a building that stays comfortable year-round by design, our insulated garden rooms are built and insulated as standard.
Our summerhouses are generally only designed for usage 6-9 months of the year. This is because the 11mm thick walls do not provide ample insulation to keep warmth in during the chillier months. You do have a couple of options, though - we offer thicker walls (up to 44mm) on our log cabin summerhouses, which means they keep a lot more heat in. Alternatively, you can opt for a premium insulated garden room which is designed for year-round use.
In most cases no—garden summerhouses usually fall under "permitted development," so planning permission isn't needed. The common conditions are that the building must sit behind the front of your house, not cover more than 50% of your garden, and stays under 2.5m high if it's within 2m of a boundary. Stricter rules can apply if you live in a conservation area or a listed building, or if you intend to sleep or live in it. Because permitted development depends on your specific property, we'd always recommend checking with your local planning authority if you're unsure.
For the full rules—including how much taller you can go when the summerhouse is set away from your boundaries, and where verandas and raised decking stand under the 0.3m rule—see our guide: do you need planning permission for a summerhouse? If you're in Scotland or Wales, where the rules differ, our main planning permission guide covers all three nations.
Yes—BillyOh summerhouses can be tailored to suit your space and how you'll use them. Options include:
- A range of sizes to fit your garden
- Switchable door and window positions on most models
- The choice to paint or treat the exterior in any colour you like
- Pressure treatment for longer-lasting weather protection
- Hang decorations and mount shelves for ornaments to make the interior your own.
The available options vary by model, so check the individual product page for the full list.
All our summerhouses arrive as DIY kits—we deliver the pre-cut parts, and most assemble with basic household tools. Apart from our log cabin models, the summerhouses use modular panel walls that lift into place easily and let you choose where the doors and windows go.
To get ready, you just need a flat, solid, level base with good drainage—a patio, decking or a bed of bricks all work well.
For a full walkthrough, see our guide to planning and building a summerhouse.
We don't offer an installation service ourselves, but you're welcome to arrange a local builder if you'd prefer help putting it together.
Why choose a BillyOh summerhouse?
We've been designing and building garden buildings in the UK since 2000, and we sell them direct. That means the summerhouse you order is made in our own factory and shipped straight to you, so you're paying for the building rather than a middleman. Here's what that gets you:
- UK-made, sold direct: built in our own factory and delivered free to most GB postcodes—no retail markup.
- 11mm tongue & groove cladding: interlocking panels that lock together to keep rain out and stand up to British weather.
- Backed for the long term: a 10-year guarantee against rot as standard, extended to 15 years when you choose pressure treatment.
- Built to suit your garden: a range of sizes, roof styles and finishes, with switchable door and window positions on most models.
- Flexible payment: spread the cost with finance at checkout, subject to status.
Which summerhouse is right for you?
The right model depends on the size of your garden, how you'll use the building, and how much of the year you want to use it. A few things to weigh up before you buy:
- How you'll use it. For occasional spring-and-summer use—reading, relaxing, entertaining—a standard 11mm summerhouse is ideal. If you want a year-round office or gym, look at our thicker-walled log cabin summerhouses (up to 44mm) or a fully insulated garden room.
- The space you have. Tight on room? A corner summerhouse tucks into an unused corner with a diagonal-facing entrance and a wide view of the garden. For bigger plots, a 12x8 or larger gives you room for extra furniture and multi-purpose use.
- Roof style. A pent roof gives a flat, modern look and sheds water to the rear—good for sitting against a fence or wall. An apex roof has the traditional peaked-house shape and extra headroom in the centre. A reverse apex puts the gable and door on the long side for a wider frontage.
Still unsure? Our sales team can talk through the options—request a call back using the button above.
Tongue & groove construction
Every BillyOh summerhouse is built with 11mm tongue & groove cladding. The panels interlock vertically so rain runs off the surface instead of seeping between boards, which is what keeps the building weatherproof through a British winter. It's a stronger, more weather-resistant build than the overlap cladding used on many budget garden buildings.
Pressure treatment and your guarantee
Timber left untreated will eventually rot. To prevent that, we offer pressure treatment on most of our summerhouses: the timber is treated under pressure so the protection soaks deep into the wood rather than sitting on the surface, guarding against rot, decay and insect damage for the long term. It also saves you re-treating the building yourself each year. Choosing pressure treatment extends our standard 10-year anti-rot guarantee to 15 years.
Can you use a summerhouse all year round?
Honestly, a standard summerhouse is designed for around 6–9 months of use a year—the 11mm walls aren't thick enough to hold heat through the coldest months. If you want true year-round use, you have two options: step up to a log cabin summerhouse with walls up to 44mm thick, or choose a fully insulated garden room built for use in every season.
How to order your summerhouse
Ordering is straightforward:
- Choose your model. Browse the range above and pick the style and size that suits your garden.
- Customise it. Select your size, roof style, treatment and any optional extras.
- Place your order. Add to basket and choose your payment option, including finance.
Once you order, we begin manufacturing your summerhouse to spec and contact you with a delivery date as soon as it's ready. All our summerhouses arrive as DIY kits that assemble with basic household tools—see our guide to planning and installing a summerhouse for what's involved.