top of page
Outdoor garden room

Welcome To Eleven Tree's Garden Creations 

About Us

Eleven Trees has been operating in South London since 2007, with over 20 years of experience designing and creating luxury tailored garden rooms we have taken on a range of interesting and challenging projects. What makes us stand out is our meticulous attention to detail and outstanding craftsmanship. 

Unlike most of our competitors, our team are highly skilled carpenters and joiners and with our large supplier base it allows us to source special materials you cannot find at the usual merchants.

We are committed to delivering exceptional quality and service. With our in-house design team we work closely with each client to create your dream garden room.

garden rooms west london

Our Work

Our Process

To bring your garden room to life we like to start with an on-site quote, this usually takes no longer than 30 minutes of your time.


It's all a very collaborative process to ensure the end product is just perfect for you. We usually like to explain all the materials used in the build so you have a clear understanding of the structure and aestetics.  Assessing the space available, we will measure up exactly where you want your garden room to be built. 

We will then email you a detailed quote with a 3D visual of your garden room from what we discussed on site. Below is a typical design.

Once you've accepted your Garden Room quote that is tailored to your specific requirements and you're happy to proceed, we ask for a small fee to secure your start date.


On day one we are on-site from 7:30 am. We begin with site preparation and the ground works. With our garden rooms with use a very specific construction method and this is by forming a base by setting reinforced concrete lintels in cement. This method allows for less to be dug out, more drainage and plenty of airflow which are all important factors when constructing a timber framed base and build.


After the base, things start to move quickly. The basic structure usually goes up in 2-3 days, depending on the size.


When the basic structure is complete, the roof will be erected and covered using EDPM which is our standard roof option. It gives an excellent waterproof barrier to your garden roof structure and is specially designed for flat or low-sloped roofs. It is a durable rubber roofing membrane which is used worldwide. It has a life expectancy of more than 50 years with a 30 year weather security guarantee.


Next, we move onto fitting the doors and windows and you can finally see your vision coming to life.


With the finish line in sight the internals will be insulated and the plasterboards will be fitted in place for the room to be plastered, once this is dry the final stages will begin.


Your garden room is then painted with 3-4 coats of high quality paint and the laminate flooring with electric underfloor heating is laid, all fixtures are fitted and at this point. The electrician will also be on site to sign off the electrical certificate.

On completion, the clean up puts the finishing sparkle on your Garden Room, we then hand over your keys and Eleven Trees welcome pack then all you have to do is move in your furniture and pop the kettle on! 

Wait, shouldn't there be more phases? Nope it really is that quick and simple. This entire process of a 18m2 garden room usually takes no more than 2-3 weeks to complete.

Frequently Asked Questions

  • Do I need planning permission?
    The maximum height must be 2.5 metres (like a ordinary room in your home) and externally no larger than 30 square metres to fall within permitted development and you will not need any planning permission
  • Are the electrics installed?
    Yes, electrics to your garden room will be installed, connected up to your home and signed off by our fully qualified electrician.
  • Will your garden room increase the value of our home?
    Adding a garden room to your home will increase the value of your home. It will also make it extremely desirable for any potential buyers.
  • How long does it take to build a garden room?
    The entire process of a typical 18m2 garden room usually takes between 2-3 weeks, however this will depend on any additional services you may require.
  • I have a very small garden, can I still have a garden room?
    Of course, no job is too big and no job is too small, our garden rooms can be as compact as 3m x 3m.
  • Are your garden rooms warm enough to use in the winter?
    Yes, they are insulated from floor to ceiling to roof! As well as electric underfloor heating as standard.
  • Can you soundproof a garden room?
    Our garden rooms have exceptionally good sound proofing properties whilst maintaining effective thermal properties. In addition to this we can also look at more effective soundproofing options for music/recording studios like building cavity walls and more.
  • Do your garden rooms come with a warranty?
    Our reputation speaks for itself but for complete peace of mind we provide every customer with a 12 year warranty.
  • What access do you need to build a garden room?
    As all our garden rooms are timber framed, we can access through fairly tight spaces. There is often an issue with limited side access at many London properties, which might present a problem for other manufacturers. However, because we custom-build all garden rooms we can adapt our solution to meet the specifics of your access.

Why Choose Us

garden room guarantee

12 Year Guarantee

Our reputation speaks for itself but for complete peace of mind we provide every customer with a 12 year warranty.

garden room personal service

A Truly Personal Service

The garden room specialist who visits you will oversee the entire project from start to finish, and we're only finished when you're 100% happy with your new garden room 

garden rooms independantly reviewed

Independently Reviewed

Our work speaks for itself and so do our customers! Read some of our five star reviews across our social media platforms.

quality garden rooms

Quality Service

Our focus is always on delivering a first-class service to our customers with that being said we are proud of the service we offer which is why our customers recommend us time and time again.

Let's Discuss 
Your Next Project

Don’t hesitate to contact us today to turn all your ideas into reality. We are always ready to listen to your projects and help bring your vision to life. Fill out the form or use one of the contact information listed below. We look forward to hearing from you!


0208 798 2610


Opening Hours:

Monday: 07:00 - 17:00

Tuesday: 07:00 - 17:00

Wednesday: 07:00 - 17:00

Thursday: 07:00 - 17:00

Friday: 07:00 - 17:00

Saturday: 07:00 - 13:00

Sunday: Closed

eleven trees garden rooms logo

Contact Us Today

Thanks for submitting!

bottom of page