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So, you’re looking for a large summerhouse. These offer bigger spaces, more flexibility, and a chance to make it work for more than one purpose. Below are some of our bestsellers—see which one suits your space and plans best.
Our BillyOh Large Summerhouses
Our large summer houses provide spacious interiors, no awkward corners or wasted space. Some offer modular layouts, others feature full-length glazing, and there are insulated options too.
Let’s start with:
BillyOh Switch Pressure Treated Pent Summerhouse
Enjoy full-length windows spanning the front and one side (like an L-shaped), flooding the interior with loads of natural light. The wraparound glazing makes the whole space feel bigger and more open—perfect for an ‘outdoor’ living setup. It makes a lovely spot for hosting friends, laid-back family evenings, or relaxing with the garden in full view.
That’s not all. The easy-access double doors are fully customisable, meaning you can position them to suit your layout. Want the entrance facing the patio? Or opening out towards your seating area? No problem.
More design insights:
- Modern pent roof that gives you more headroom at the front (plus better water runoff)
- Pressure treated as standard, with an extended 15-year guarantee against rot, decay, and insect infestation
- Largest sizes available: 20×8, 20×10, and 24×10
BillyOh Petra Tongue and Groove Reverse Apex Summerhouse
For this model, you’ll get full-width, panoramic windows across the front wall, complemented by a double window section on one side. The design creates a sense of separation, unlike the BillyOh Switch, which has a continuous, fully glazed layout.
Inside the generous interior is a standard tongue and groove timber floor, which can be upgraded to 19mm and pressure-treated. A feature like this can support heavy equipment, the intense workouts, and other demands of a garden gym.
Or set up a dining area. Petra’s reverse apex roof gives it that classic, house-like shape, making the space feel more homely and well-suited for sit-down meals.
More design insights:
- Pressure-treatment option
- 4ft wide central double door entrance
- Built using Tongue and Groove panels, with a ridge height of 7.6ft or 8.1ft, depending on size
- Largest sizes available: 16×8, 16×10, and 20×10 (bit smaller options than the Switch)
BillyOh Bella Tongue and Groove Pent Summerhouse
The Bella is quite similar to Switch, except its long, stylish windows only face the front. Natural light still pours through, but with added privacy on both sides. This layout might be for you if you plan to place the summer house near a fence or neighbouring garden.
The contemporary pent roof design is a bonus if you’re into clean, simple lines that don’t feel bulky in the garden.
More design insights:
- High-strength SAN glazing on windows and the central double door with fully adaptable configurations
- Standard 11mm timber flooring with optional upgrade to 19mm
- Largest size available: 16×8—suitable for a shaded seating area, a hobby room, or a creative workspace
BillyOh Dojo E Insulated Building
Dojo E is our most premium log cabin summerhouse to date. It includes everything a modern garden room needs, made even better with a reversible design. This feature lets you reverse the windows and doors on either the left or right.
The inset windows have a silhouette-style look and sit beneath a slight roof overhang, adding a bit of shelter and a more defined shape to the front. There’s more: the low-pitch angle of the roof showcases a fascia frame, adding to the unit’s contemporary style.
More design insights:
- Built-in hybrid insulation in floors, walls, and roof
- Upgrades available for pressure treatment and uPVC windows
- An extended platform base that creates a raised area at the front for seating
- 27x44mm premium internal framing, 19mm floorboards, and 11mm sheet roof as standards
- Your choice of three spacious sizes: 14×10, 18×10 or 22×10
The ideal garden room for year-round use, whatever you plan to use it for!
Quick Comparison Table of Our Large Summerhouses
| Model | Roof Style | Window Layout | Sizes Available | Flooring Options | Key Features | Best For |
| BillyOh Switch | Pent | Full-length wraparound (front + side) | 20×8, 20×10, 24×10 | Pressure-treated as standard | Customisable door placement, 15-year guarantee, modern look | Hosting, relaxing, outdoor-style living (Multi-use) |
| BillyOh Petra | Reverse Apex | Full front + double window on one side | 16×8, 16×10, 20×10 | T&G standard; 19mm upgrade | More enclosed layout, 4ft central doors, house-like feel | Garden gym, dining area (Multi-use) |
| BillyOh Bella | Pent | Long front-facing windows only | Up to 16×8 | 11mm standard; 19mm upgrade | Privacy on both sides, SAN glazing, adaptable doors | Creative workroom, hobby space, seating (Multi-use) |
| BillyOh Dojo E | Low-pitch Pent | Inset front windows with a roof overhang | 14×10, 18×10, 22×10 | 19mm floors; insulated | Hybrid insulation, reversible layout, platform base, fascia frame, premium internal framing | Year-round garden room, work or leisure |
Already narrowed it down or still weighing up your options? Our full selection of large summerhouses is just a click away. See what sizes are in stock, check prices, and explore more extras.
Browse our range of summer houses for sale or click the shop button below.
