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    • The Annex
          • The Annex specialises in permanent living solutions, creating garden houses complete with a kitchen and bathroom. Available in two customisable designs.

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Using our configurator you can design your perfect garden office with minimal effort, ensuring it’s tailored to your own personal preferences and specifications.

You can get a great idea of how your new garden office will look by using the 360 degree rotating viewer.

Also compatible with mobile and tablet devices

Go To Configurator product enquiry

Annex 2

Modern contemporary styling

Our Annexe 2 range is one of the most popular designs we’ve ever created. Featuring a graphite hood, composite decking as standard and corner window design features, the Annex 2 brings the garden and its views inside the annexe.

Sizes and Prices include VAT and are based on standard kitchen, bathroom and electric options, a 2.3m French door, a rectangular and a lozenge window and planning permission. Also included in our standard prices are foundations, site levelling up to 300mm and full building control sign off, 10m of plumbing and 20m of electrical connection.

Sizes and prices are based on internal floor area and include base, installation and VAT
Choose your size from three width options:
5m 7.5m
8m 10.5m
11m 14m



5.0m 5.5m 6.0m 6.5m 7.0m 7.5m
£81,745 £83,745 £85,745 £87,745 £88,995 £90,245
£84,995 £86,995 £88,475 £89,995 £91,475 £92,995
£87,995 £89,745 £91,245 £92,745 £93,995 £95,495
£90,245 £91,745 £94,245 £95,995 £97,495 £98,745
£92,245 £94,245 £96,245 £98,245 £100,245 £102,245
8.0m 8.5m 9.0m 9.5m 10.0m 10.5m
£91,995 £93,495 £94,995 £96,495 £97,995 £98,745
£94,495 £95,745 £96,995 £98,995 £100,995 £102,995
£97,245 £98,745 £100,245 £102,995 £104,745 £106,495
£100,495 £102,495 £104,495 £106,495 £108,245 £109,995
£104,245 £106,245 £107,995 £109,995 £111,995
11.0m 11.5m 12.0m 12.5m 13.0m 13.5m 14.0m
£99,995 £101,495 £102,745 £104,745 £106,495 £108,245 £109,245
£104,745 £106,495 £107,745 £108,745 £109,745 £110,745 £111,745
£108,245 £109,995 £111,495 £112,995      

Product Features

The Annex offers the ultimate solution for extra space at home or for your business, so we make sure the price of your annexe includes a variety of options and services. We supply and fit a host of the highest quality appliances as standard alongside an unrivalled end-to-end service solution, which includes full management of planning permission.

All sizes and prices include VAT. Also included: kitchen, bathroom and electric options, a 2.3m French door, a rectangular and a lozenge window, foundations, levelling, electrical and plumbing connection planning permission, and building control sign off.

A turn-key solution you can trust

Transparent pricing, Quality as standard

We understand that purchasing a garden annexe is a huge investment, which is why we do the hard work for you. Exceptional customer service and quality is in our DNA. We’ve painstakingly perfected our process over more than a decade of constructing rooms in the garden.

From our specialist planning consultant, to our British handcrafted Sheraton kitchens, we ensure that every element of your journey with us at The Annex is looked after.

Ready to get started?

Customer Reviews You Can Trust

Take a look at our many positive Trustpilot reviews to see why our customers rate us 5 stars.

This experience was a just so amazing…

This experience was a just so amazing from start to finish. Mackenzie showed me around when I visited to view the Basebox. She was really friendly and so well informed. She had all the info I needed and a couple of questions she went and double checked. There was no hard sell - just a genuine enthusiasm for the product. I was then contacted by Nicole who oversaw the planning of the times etc. Nicole was also so very helpful. She was always quick to respond and reassuring. She kept everything on track and was a delight to talk to.....she put up with some silly questions from me! lol Everything thing was done on the day it was planned for. All the men who came were a pleasure to have around. Polite, hardworking and very dedicated to doing a good job. They were also enthusiastic about working for Green Retreats which is always a good sign. They were a credit to the company and deserve recognition for this as they are the frontline of the company. A special shout out to Adam and the gang who did the installation. There were a couple of obstacles- e.g. traffic due to an accident on the route, one man down - but they stayed late until the job was done - such commitment - they worked soooo hard. They even came back another day to double check in daylight that it was to the high standard they wanted to deliver. The foundations men and the electricians and WiFi guy had the same dedication. Sorry - so many names I couldn’t remember them all. On top of that I am over the moon with my Basebox! It is even better than I imagined it would be - an excellent product. The interest free credit is such a blessing as well. It meant i didn’t have to spend all of my savings or remortgage.


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At The Annex we believe in keeping things simple. We’ve compiled answers to the most frequently asked questions about our garden annexes.