Clever Triangular Garden Room Design
First Published: 17 July 2022
Refreshed: 21 October 2024
Reading Time: 2 minutes 10 seconds
When working with a bespoke designer like A Room in the Garden, you are not limited to square or rectangular garden rooms. They can create a building that fits seamlessly into your garden without compromising the functionality of the available space, as this beautiful triangular design demonstrates.
The client’s garden overlooks Bognor Beach, and they wanted to create a sitting room where they could relax with a book, enjoy the garden, and take in the fresh sea air.
Triangular Room Perfect for the Garden Corner
This garden room is positioned in the corner of the garden, where an old shed once stood. Triangular garden room designs are a clever choice for corner spaces, as they create a wide front elevation that focuses the view into the heart of the garden.
Measuring 6.5m x 7m, this triangular sitting room mirrors elements of the owner’s house and features a beachside aesthetic to complement its coastal surroundings.
Durable External Finishes for a Seaside Location
Given the room’s proximity to the sea, durable external finishes were essential. The front elevation features high-spec powder-coated aluminium bifold doors. These six-leaf doors split in the middle, with three folding back to each side, neatly stacking in the canopied porch area.
The front elevation is clad in Millboard, a cement fibreboard with a coloured resin surface that is both durable and low-maintenance. Millboard cladding has a tactile woodgrain texture, created using real wood in the moulds during manufacturing. It requires no painting to maintain its colour, making it an excellent choice for this seaside location.
The other walls are finished with Millboard decking boards. These boards are about twice as thick as the cladding, providing a robust option for walls exposed to harsh weather and salt spray from the sea. This design ensures the room is well protected from the elements.
The detailing and colour of the Millboard, likely in Smoked Oak, have achieved the beachside aesthetic the clients were hoping for.
High-Spec Interior Finishes
Inside, A Room in the Garden finished the main room to a high standard, with plastered and decorated walls and stylish oak laminate flooring.
The triangular point at the rear of the room has been cleverly transformed into a functional storage space, showcasing the designers’ ability to think creatively. The interior of the storage room is lined with durable birch plywood, making it a practical choice for this area.
A Room in the Garden buildings are highly insulated, ensuring they remain naturally warm in winter and cool in summer. For added comfort, underfloor heating has been installed, providing warmth on colder days. This choice keeps the walls free from heaters, contributing to the room’s clean, minimalist lines.
The room’s electrics, which include LED lighting, underfloor heating, and ample power sockets, are controlled by a Lutron system, allowing the owners to manage everything from a single control panel.
Learn More
To find out more about how A Room in the Garden can create a bespoke design tailored to your needs, contact their team on 01273 80 70 77 or email hello@aroominthegarden.co.uk. You can also explore their website at www.aroominthegarden.co.uk for more examples of their tailor-made projects.





