How sustainable are London Garden Rooms?

Our garden rooms are designed for a sustainable life

We design our garden rooms for life. That doesn’t just mean we create each one individually to complement your lifestyle. It means we build with the future in mind.

We build our garden rooms to last, from the first screw in our foundations to the last lick of our environmentally-friendly paint.

We use the most durable materials and carefully consider the environmental impact of everything that goes into building each project.

We know this means a bit more of an investment upfront, but our sustainable approach means this is balanced out in the medium term. The quality of materials we use, and our industry-leading insulation panels, ensure lower running costs, energy usage and a much longer life for your garden room.

All our bespoke luxury garden rooms are designed specifically for you. Minimising waste and ensuring each installation meets our rigorous environmental commitments.

Why is Sustainability Important?

At London Garden Rooms, we believe there’s nothing more important than building a more sustainable world for future generations.

We should all be conscious of minimising our impact on our natural environment and protecting our resources and the broader ecosystem. At London Garden Rooms, we also understand how important the construction industry is to deliver that future.

Our garden rooms mean you can get closer to nature; think of them as a house extension that brings you right into the heart of your garden.

This new perspective will help you appreciate why sustainability is so important and why it’s a positive investment to choose a garden room company that builds with the environment in mind.

Is a Garden Room a Good Investment?

You would expect us to say yes to this, wouldn’t you? But it’s always important to balance the upfront cost of any garden room installation with your investment over the long term.

You’ll find cheaper alternatives to London Garden Rooms, but “you get what you pay for” is a cliche because it’s true.

It’s helpful to think about this question in 2 parts.

A London Garden Room is a good investment for the environment because it’s a natural alternative to the much more intensive process of building a house extension. It’ll also have much lower running costs, and energy consumption, than cheaper garden room alternatives over the long term.

But a garden room is also an excellent investment because it’ll increase the value of your house. Estimates suggest that the additional value could be around 25%.

How Long Do Garden Rooms Last?

We use the most durable materials at London Garden Rooms to ensure that our garden rooms stand the test of time. Of course, it’s always challenging to put a precise figure on it, but – if cared for and maintained adequately – we expect our garden rooms to last more than 25 years.

Our roofing systems come with a 20-year guarantee which gives you some idea of our confidence in the materials we use.

Our British Garden Rooms

Sustainability in the building industry starts with the supply chain. That’s why London Garden Rooms proudly supports British manufacturing – utilising a short, local supply chain wherever possible on each project.

We’ve worked with the same local suppliers for years, encouraging their own journey to greater sustainability and growing our business with theirs.

Our local supply chain allows us to reduce our carbon footprint, lower our share of emissions and reduce our energy consumption. It also allows us to promote social sustainability – supporting the local economy means better financial distribution across the UK and investment in British businesses and jobs.

Sustainable Foundations

The sustainability of our installation starts with the bottom up. We don’t use a typical concrete base; instead, we use a galvanised steel screw foundation.

At London Garden Rooms, we were proud to be one of the first companies to use this approach, and it’s now widely adopted by the building industry.

This approach is more versatile, durable, robust, and environmentally friendly.

Concrete is cement mixed with aggregate, and we know that almost 50% of CO² in the construction industry is from cement production. That’s why we avoid its use altogether. We are also able to recycle our steel foundations at the end of the long life of our garden rooms.

Not only is this better for the environment, but it’s better for you and your project. No concrete means no disruptive excavations, diggers, or big cement mixers.

Sustainable Timber

Timber, sourced sustainably, is an incredibly environmentally-friendly building material. We have a close relationship with all our timber suppliers to ensure they are also committed to the same high sustainability standards. Our leading supplier is Brooks Bros. – one of the most established timber merchants in the UK. Brooks Bros. has its own five-year environmental strategy.

All the timber we use in our cladding and flooring is the highest quality and sustainably sourced from well-managed forests where trees are harvested and replaced.

Through sensitive, sustainable construction, it’s possible to protect and improve biodiversity. So we don’t just want to be carbon neutral; we want to impact the future of people and the planet positively.

Sustainable trees are an essential part of our garden room process and vital for removing CO² from the atmosphere.

That’s why we’ve partnered with the Just One Tree initiative. They help us plant at least two trees for every one of our garden room projects.

Our Sustainable Roofs

Our roofing systems use the Firestone RubberGard EPDM membrane. It’s the market-leading sustainable garden room roofing solution.

EPDM is an inert material with limited environmental impact during the manufacturing, installation, and use stages.

Our roofing systems have a 20-year guarantee and a life expectancy of 50+ years.

Don’t just take our word for the sustainability of our garden room roofs; they’re also Greenpeace’s recommended roofing membrane.

Our sustainable approach to roofing also translates into our water conservation. We install full guttering and downpipes and encourage our customers to use water butts to retain and reuse the water to keep their gardens hydrated.

Green Roofs

We also offer the option of a Sedum living roof as part of your garden room installation. Sedum roofs are far more than just an eye-catching aesthetic option.

They also generate several eco-friendly benefits:

  • Natural wildlife habitat
  • Prevents flooding – drains rainfall more slowly, ensuring less pressure on local drainage
  • Noise reduction
  • Increased thermal insulation

At London Garden Rooms, we build for the future. So whether you want an environmentally-friendly garden office, an insulated home cinema, or to turn your garden room into a fully plumbed-in garden guest house or even a permanent additional living space for your existing house. The options are limitless, but our environmental impact isn’t.

Our passion for designing and building the most sustainable garden rooms possible means we will create a space you and your family can enjoy for years to come.


Our insulated garden rooms have the lowest U values of any similar design; due to the market-leading structural insulated panels (SIPs) we use from Premier Sips.

Most SIPs are made by glueing the different layers together to produce a finished panel. Our SIPs are pressure injection moulded by clamping the boards in place and pumping liquid resin into the gap. As the resin cures, it binds to the boards resulting in far superior durability and insulation capability.

Our SIPs keep you and your family warmer in the winter and cooler in the summer—lower energy bills for you and the lowest possible environmental impact.

Our aluminium doors and windows are also environmentally A-rated and significantly more sustainable and effective than similar uPVC options.

What’s next?

If you’re interested in a free consultation with our team at London Garden Rooms, then fill out this form, and we’ll respond as soon as possible.