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Composite lumber is an innovative man-made material that blends wood fibres, polymers, and resin binding agents to create a highly durable, natural-looking alternative to timber.


Purpose-built for longevity, our composite garden rooms are much easier and more cost-efficient to install than other timber structures such as summer houses and sheds. We combine this innovative material with our unique construction processes to create superior quality composite garden buildings that promise a lifespan of 30+ years, with a 10-year guarantee on all materials.

Composite Garden Buildings from £12,959

Bespoke composite garden buildings for year-round use. A low maintenance, weather-resistant alternative to traditional timber garden rooms, with the natural look and finish of real wood. Fast, free nationwide installation. 10-year guarantee.

Durable Composite Garden Buildings

Unlike plastic cladding or traditional timber structures, composite garden buildings are fabricated using a unique blend of timber fibres, polymers, and resin.

Composite garden buildings offer all the aesthetic benefits of real wood with none of the maintenance. The natural-looking finish even feels like wood with an embossed grain, but unlike timber this ultra-durable material is supremely weather-resistant, making it the ideal cladding for a garden room. Unlike hardwood cladding, composite wood does not splinter, rot, warp, or fade in the sunlight. Apart from the occasional clean, there is absolutely nothing to do to maintain a composite garden building – no regular painting, staining or preservation treatments whatsoever.

Flexible Composite Garden Rooms

Our composite garden buildings are a versatile solution for anyone looking to enhance their garden and create more living space.

Whether you need somewhere to work, a space to relax, or just more room for your family, a garden room is a fantastically flexible solution. Composite garden buildings take that one step further by providing a space that will last a lifetime – without any upkeep. A composite garden room is a superior choice for those looking to quickly create a long-lasting solution with no expensive or time-consuming maintenance.

Composite Garden Building Possibilities

Our outdoor spaces are so flexible and versatile, the possibilities for usage are endless. And best of all, the function of your composite garden building can evolve as the needs of your family change, providing you with a truly lifelong investment.

  • Home offices and workspaces
  • Garden gyms and fitness studios
  • Pool and hot tub rooms
  • Treatment rooms and garden salons
  • ‘She Sheds’ and ‘Man Caves’
  • Outdoor craft rooms and art studios
  • Music rooms and dance studios
  • Garden bars and outdoor kitchens
Natural Finish

Robust Material, Natural Finish

Our composite garden buildings look just like natural timber, but their performance is anything but ordinary. Investing in a composite finish will give your garden room a longer lifespan, increase durability, and eradicate any need for maintenance.

We clad our composite garden buildings in robust polymer-based planks that look and feel exactly like real timber. From the choice of natural shades to the inclusion of a raised irregular grain, everything about our composite materials mirrors the appearance of real hardwood to blend seamlessly into your surrounding garden for years to come.

Low Maintenance & Weather Resistant

Our highly insulated, ultra-durable composite garden buildings are the very best solution for low maintenance and longevity.

Unlike real wood, composite garden rooms are stain and fade resistant, which means that there is no need to paint, varnish or treat the exterior – ever! The composite planks are splinter-free and will not split, twist, or warp in the same way as timber often does. The composite materials also absorb little to no water, which means there is no risk of your garden room degrading, rotting, or developing damp related fungus, which is ideal for pool buildings, hot tub rooms, and the generally damp British weather.

Composite Garden Building 3D Design Tool

It’s so easy to start designing your composite garden building and get an instant price. Use our drag and drop design tool to customise one of our best-selling garden room designs or start creating your bespoke composite garden room from scratch. Change the size, shape, and layout of your garden room; customise the doors, windows, walls, and decking; and add in extra fixtures and fittings to create an outdoor space that is perfect for your needs.

View an instant cost estimate and save your composite garden building design to edit later. Submit it when you’re ready, and our expert design team will help you finalise your layout and provide a detailed cost breakdown.

Innovative Materials & Construction Methods

Composite lumber is an innovative man-made material that blends wood fibres, polymers, and resin binding agents to create a highly durable, natural-looking alternative to timber.

Purpose-built for longevity, our composite garden rooms are much easier and more cost-efficient to install than other timber structures such as summer houses and sheds. We combine this innovative material with our unique construction processes to create superior quality composite garden buildings that promise a lifespan of 30+ years, with a 10-year guarantee on all materials.

Wondering How To Finance Your Modern Garden Room

Flexible Finance Options

Get the balling rolling right away and have your composite garden building designed and installed in a matter of weeks, with just a small deposit.

We have partnered with Pegasus Personal Finance to provide a range of flexible finance options to help you manage the cost of your new composite garden building. Depending on your circumstances and deposit contribution, you can spread the cost of your investment across several instalments and flexible monthly payments.

Book a Free Survey

There are many composite garden building suppliers, and we understand that choosing the right contractor is a big decision. So, to make things simple for you, we offer a free, no-obligation survey and quotation service to help guide and inspire you.

Our expert design team will visit your home to assess your outdoor space and take a full brief of your requirements. Following this, we can provide bespoke recommendations for how to design your composite garden building, from the basic size, layout and construction of your garden room to the fixtures, fittings and décor. We can factor in optional extras such as canopies, steps and decking to make your composite garden building truly bespoke. We will supply a complete breakdown of costs and a projected timeline for installation and project completion, which can usually be achieved in as little as 3 weeks!

Contact us today to find out how we can help you with the end-to-end installation of a bespoke composite garden room, or get started designing your garden room today with our free online 3D design tool. Simply drag and drop the features to get an instant price estimate.

MODERN GARDEN ROOMS LTD Registered in UNITED KINGDOM, Number 09592664 Garden Office
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