Composite Garden Buildings from £12,959

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

Modern composite garden room

Bespoke Composite Garden Offices

Unlike garden offices finished with plastic cladding or made from traditional timber, composite garden buildings are constructed using a unique blend of timber fibres, polymers, and resin.

The natural-looking finish of a composite garden office offers all the aesthetic benefits of real wood. It still feels just like lumber with its realistic embossed grain and wide range of colours and finishes; but unlike timber, our robust composite cladding is incredibly weather-resistant. Traditional hardwood is prone to splintering, rotting, warping and fading, and requires frequent painting, staining, or treatments to preserve it and extend its lifespan. Except for an occasional clean, there is absolutely nothing to do to maintain a composite garden building, making it the ideal solution for your bespoke modern garden office.

black garden room

Versatile Composite Garden Buildings

Composite garden offices are a flexible, low-maintenance solution for creating a dedicated workspace in your garden.

A composite garden building is an ideal choice for those looking to quickly create a flexible home office solution. Typically, we can have your composite garden office designed, fabricated, and installed in as little as 3 weeks. Our versatile spaces are ideal for traditional office setups or creative studios, and even garden salons and treatment rooms. Best of all, the function of your composite garden office can evolve as your needs change, delivering you with a truly practical investment. Composite garden buildings provide an outdoor office that will last 30+ years – without the expense and time associated with annual maintenance.

Cost of garden room plastered

Naturally Finished Garden Offices

We clad our composite garden buildings in robust polymer-based planks that look and feel exactly like real timber, with none of the downsides of traditional wooden structures.

Choosing a composite finish for your garden office will give the building a greater lifespan, increase its durability, and take away the need for future maintenance and upkeep. To ensure your composite garden building looks like it’s been constructed from natural timber and blends organically into your outdoor space, we offer a range of shades and tones for you to choose from. They each feature a three-dimensional grain for a finish that feels exactly like real wood.

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 timber often does. The composite materials also absorb little to no water, which means there is absolutely no risk of your garden room degrading, rotting, or developing damp related fungus, which makes composite ideal for pool buildings, hot tub rooms, and the generally damp British weather.

Design your Composite Garden Building

Start designing your composite garden office and get an instant price for your new home office space.

Use the simple drag and drop design tool to begin designing your ideal garden office from scratch, or customise one of our best-selling composite garden buildings. Get an instant cost estimate as you personalise your design, and save your plans to edit later. Once you’re ready, submit your composite garden building design to our team who will help you finalise the layout and provide a detailed cost breakdown and timeline for installation.

modern home office in the garden

Innovative Materials & Construction Methods

Our composite garden buildings are clad in a robust material manufactured from a unique blend of wood fibres, polymers, and resin. This composite fabric offers a highly durable, natural-looking alternative to timber.

Though composite garden offices are more expensive to install initially, they are a much more cost-effective option in the long run. Unlike traditional timber structures such as summer houses and sheds, our composite garden offices are purpose-built to give you a longer lifespan and therefore a better return on your investment. And with absolutely no maintenance required, you will save a fortune on upkeep over the years.

We combine this innovative composite material with our unique construction processes to create outstanding composite garden buildings with a minimum lifespan of 30-years, backed by the security of a 10-year material guarantee.

Garden Spaces You'll Love to Work From Whether your prefer to work al fresco, or like the comfort of walls and electricity you'll find inspiration for the best place to set up your makeshift office.

Book a Free Survey

garden office planning Permission

Modern Garden Offices offer a free, no-obligation survey and quotation service to help guide you to creating the composite garden building of your dreams.


We will carry out a site visit to assess your outdoor space and take a full brief of your garden office requirements. Following this, we will provide bespoke office design recommendations with a detailed breakdown of costs. We can even help you access flexible finance solutions to spread the cost of your composite garden building and get your garden office up and running with just a small deposit.


Contact us today to arrange your free survey. We can typically have your new composite garden building installed in as little as 3 weeks!

Composite Garden Office Features

Zero Maintenance

Once your composite garden building is installed there’s absolutely no maintenance necessary. The innovative weatherproof composite materials combined with Modern Garden Office’s unique fabrication process will shield your garden office for decades to come.

30+ Year Lifespan

Free from the risk of rotting, warping, fading, moulding or splitting, our composite garden buildings have a minimum life span of three decades. All our composite cladding and building materials are backed by a 10-year warranty for peace of mind.

Year-Round Use

All our garden offices – including our composite garden buildings – are purpose-built for use all year round. The weather-resistant composite cladding is extremely well insulated and energy-efficient to keep your garden office cosy throughout the seasons

No Planning Required

We have specifically designed our composite garden buildings to meet pre-approved planning permissions guidelines. In most cases, your new garden office can be installed in as little as 3 weeks – without the need for a planning application.

Fully Customisable

From the size and shape of the building to the style and placement of fixtures and fittings, our composite garden rooms can be completely customised. Tailor your modern garden office to your exact requirements with our online drag and drop design tool.

Beautiful contemporary garden office, built within 3 days! Spec and ordering process was simple.

Caroline McCarthy (October 2023)

Just had a garden room installed. The whole operation was simple and straightforward. John and Luke, who did the building were friendly, efficient and tidy and did an amazing job. I would highly recommend. Thanks guys!

Ian Richards(September 2023)

I could not praise Tim & Eddy enough (the builders)! the building of my outside office went like clockwork & Modern Garden Rooms are a pleasure to deal with, I could not recommend them more !

Steve Arber (July 2023)

AMAZING team, service, expertise and so friendly too. I would highly recommend

Gwladys Hall (June 2023)

I have recently had a garden room built and am so pleased with the finished product. Although it is one of the smaller rooms, it has given me a spacious working space that has exceeded my expectations.

Jo Hunt (September 2021)

Steve and Sam completed our room not that long ago and it was a fantastic job through from our initial contact with Mandy to the final completion.

Graham Cartmell (September 2021)

From start to finish the Modern Garden Rooms team we're fantastic. Michael was great with the plans and talking us through our options and what would work to make the most of the small space we had.

Becky, Seth and Fern Bignall (October 2021)

Hi Mandy hope all is well with you. Many thanks for a wonderful space that you and your team created for us.

Matt from Liversedge (July 2020)

Communication is amazing, and Mandy is very thorough! Looking forward to works in the future.

David from Potton (June 2020)

Hi Amy, Martin & Jack were great this week. We enjoyed the build and greatly appreciated their efforts.

Richard from Sheffield (June 2020)

Hi Jonny, very happy with Lewis – good guy who gets on with the job and is easy to work with. The pool house looks great.

Janice From London (June 2020)

Lewis thank you once again for all your hard work over the past few days. The room looks fantastic, and we are delighted with it.

Corinna from Doncaster (April 2020)

Just like to say how great your guys were to deal with- a real credit to any business and exceptionally hard working.

Allen from Guildford (March 2020)

Hi Jonny! We are very happy thanks. It looks brilliant and the guys were lovely.

Jo from Farnham (March 2019)

Thanks again for everything. You’ve done a cracking job. I look forward to passing on your details to plenty of jealous friends and clients!

Tim from Kingswood (March 2019)


Book your Free Survey




71-75, Shelton Street,
Covent Garden, London,


Our Showrooms

Our new showrooms are the best place to experience our quality and range of garden rooms and garden offices.