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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 1

Compact classic design

The Annexe 1 is the perfect living space addition to any home.

Featuring a single deck step and small overhang to the front, this annexe is designed to give you maximum internal space compared with the external area the annexe takes up.

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
£71,745 £73,745 £75,745 £77,745 £78,995 £80,245
£74,995 £76,995 £78,475 £79,995 £81,475 £82,995
£77,995 £79,745 £81,245 £82,745 £83,995 £85,495
£80,245 £81,745 £84,245 £85,995 £87,495 £88,745
£82,245 £84,245 £86,245 £88,245 £90,245 £92,245
8.0m 8.5m 9.0m 9.5m 10.0m 10.5m
£81,995 £83,495 £84,995 £86,495 £87,995 £88,745
£84,495 £85,745 £86,995 £88,995 £90,995 £92,995
£87,245 £88,745 £90,245 £92,995 £94,745 £96,495
£90,495 £92,495 £94,495 £96,495 £98,245 £99,995
£94,245 £96,245 £97,995 £99,995 £101,995
11.0m 11.5m 12.0m 12.5m 13.0m 13.5m 14.0m
£89,995 £91,495 £92,745 £94,745 £96,495 £98,245 £99,245
£94,745 £96,495 £97,745 £98,745 £99,745 £100,745 £101,745
£98,245 £99,995 £101,495 £102,995      

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 annex 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.

Garden room

We ordered our garden room in January and waited until July for construction. The whole experience with Green Retreats has been exceptional and they must be one of the best companies I have ever dealt with. Extremely professional company who did everything they could to help us throughout the entire project. The brochures and initial design specification on the website was first class. The visit by a site planner went smoothly and was peace of mind for us. They took one day to lay the base, three days to construct (5 metre by 3.5 metre) and half a day for the electrician. We had a bit of an issue with the professionalism of one of the construction crew but this was hardly the fault of the company. We chose the Pinnacle design and it looks absolutely fantastic and we are very pleased with how it has turned out. Exactly what we wanted. We now have a combined home gym and office away from the home (about 200 feet from the house). The only negative feedback I would give was the electrician quote to run armoured cable from the garden room to connect into my garage was extortionate. I think I was quoted in the region of £1600 and decided to get my local electrician to do this part of the work for £450. Would highly recommend Green Retreats to construct a garden room for their utmost professionalism from start to finish. I would also recommend a visit to the showroom in Aylesbury which gave us some new ideas and a tweak of the plan to incorporate some extras. Thank you Green Retreats.

Philip Mockett

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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.