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Ultimate Package
Save an extra 15% before July 1st
Price includes saving

(Including VAT)

Now £ 4,334.14
Was £ 5,508.00 Then £ 5,099.00
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  • Aluminium Bar Capping in Moss Green
  • Western red cedar cladding
  • Western Red Cedar
  • Toughened safety glass (full sheet)
  • Free 10 Year Guarantee
  • 2 x roof vents with Automatic opening
  • 2 x Louvre vents
  • Gutter and a single down pipe including stop end (for greenhouse)
  • High eaves
  • Low level threshold
  • Staging and shelving included
  • Hinged single door
  • Installation available for a fee
Delivery in 3 - 4 weeks
Delivery Information

Delivery of new greenhouses to Mainland England and Wales is FREE, parts of Scotland may be subject to a small charge. Delivery costs will be calculated and displayed at checkout before any payment is required

You will be contacted with a delivery date when your greenhouse is ready. This greenhouse is delivered straight from the factory on dedicated transport.

Please write in the comments box at checkout any dates (holidays etc.) you would like us to avoid.

Delivery to Northern Ireland may take longer.






Quantity Required
  • Alton Additional Evolution Octagonal Louvre high level

    More information
    £ 255.00
    Alton Additional Evolution Octagonal Louvre high level

    Replaces a 795x1050 pane of glass in an Alton Evolution Octagonal greenhouse.

  • Alton Evolution auto louvre opener

    More information
    £ 45.00
    Alton Evolution auto louvre opener

    Automatic attachment for a Louvre vent, fits most louvres.  Its fully adjustable to open over a range of temperatures.

    Some drilling is required to fit.


    Please note that an auto louvre can NOT fit a louvre which is directly left of an a-frame when you look at it internally without extra packing. 

  • Alton Evolution Octagonal Double door upgrade

    More information
    £ 599.00
    Alton Evolution Octagonal Double door upgrade

    Upgrade your single door to a double door option.

    The right hand door, looking from the outside, is the slave door - the one that opens day to day.

    The left hand door can be opened by undoing shoot bolts top and bottom.

  • Alton Evolution Octagonal Louvre in cladding

    More information
    £ 255.00
    Alton Evolution Octagonal Louvre in cladding

    Replaces the lower cladding in an Alton Evolution Octagonal greenhouse.

  • Alton Evolution Octagonal shelf infill for 9ft long

    More information
    £ 129.00
    Alton Evolution Octagonal shelf infill for 9ft long

    Spans the rear of the greenhouse.

  • Alton Fitted external shading kit for Alton Evolution 6x9 Octagonal

    More information
    £ 330.00
    Alton Fitted external shading kit for Alton Evolution 6x9 Octagonal

    Strong external grade uV stable green shade netting with metal eyelets and full set of fittings 

  • Osmo UV Protection Oil Extra 2.5l

    More information
    £ 95.00
    Osmo UV Protection Oil Extra 2.5l

    One of the most regular questions that we get asked is how to care for your new summerhouse - in particular what to treat it with.

    In many ways, this can be a matter of personal opinion: Some people prefer to let the cedar fade down to its natural silvery-grey colour. A new building will begin this mellowing process as soon as it is assembled and will be noticeable after just a few weeks and will be quite silver after a year. If you like this mellow look then you can re-apply the same treatment that we use in the factory - a clear Barrattine wood protector formula every couple of years. This helps to prolong the life of the wood and reduces staining but does not alter the mellowing process. This treatment is easy to just use when needed

    If you would really prefer to try and keep the original cedar colour in the wood then we can recommend using this Osmo oil product on new Summerhouses and Greenhouses as it prolongs the colour of new cedar by protecting it from Uv light. It is quite a viscous product so needs to be applied with a brush and will need 2-3 coats for best results.

    This high-quality product is in effect a sun block for your wooden building. A 2.5l tin will be enough to coat a 6’x8’ summerhouse building approximately four times. Due to the effectiveness of this product, your building may only need treating every couple of years. Only the exterior of your building will require treating.

    IMPORTANT: In the case of a summerhouse; we recommend using this product a couple of weeks after construction. This will ensure that the cedar has had time to air-dry but has not yet started to fade. In the case of a greenhouse, it is better to coat the individual parts whilst the greenhouse is flat packed before assembly. Bear in mind that you will need multiple coats and there is a long drying time.

    Osmo uv-protection-oil extra is a satin, Clear finish for exterior. It is based on natural oils, is microporous, and does not crack, flake, peel or blister. Osmo uv-protection-oil extra prolongs the renovation time significantly. As a stand alone finish, with two coats, It prolongs the greying process on vertical surfaces by up-protection factor 12 compared to untreated wood. The finish contains active ingredients which protect it from mould, algae and fungal attack. Easy to renew, no sanding or primer necessary. Easy to apply, will not dry during application.

Quantity required

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Alton

The clever design of the Alton Evolution has created a cedar greenhouse that is ideal for modern needs, and by using innovative and strong jointing technology, the Evolution models are delivered flat packed in a self-assembly format. This removes a large amount of cost from the double handling and storage of large unwieldy glazed panels used on other models, and put simply this allows us to put more wood into the greenhouse. 

The result is an extremely strong, high quality cedar greenhouse. 

The best type of wood - and more of it!

The frame is made from Canadian Western Red Cedar, which is extremely high in natural preservative oils which, even without further artificial treatment, make it virtually immune from decay. Cedar also has a unique subtle aroma which can deter pests. The frame is based on mostly planed 2x2 (44x44mm) and 3x2 (69x44mm)

We factory treat your Alton Evolution greenhouse in a clear treatment - thus not masking the natural colour variation of the cedar wood. In time, your greenhouse will mellow into a silvery colour which is so distinctive to cedar. The Moss colour of the metal components is designed to blend in perfectly with this mature silvery colour.

- A metal base keeps the wood well away from the damp area on the floor

- Louvres and Automatic roof vents are standard.

-  High Eaves - often overlooked by greenhouse buyers, but it is important to consider. High eaves means the greenhouse feels a lot bigger, and it is far more comfortable for you to work in.

- The guttering and downpipes are included as standard.

- Glass overlaps at eaves, protecting a vulnerable area of your greenhouse from rot.

* The Ultimate Package includes an upgrade to aluminium bar capping from the standard cedar capping, all-round aluminium staging and 2 high level shelves in moss green.

Octagonal greenhouse dimensions diagram
  • A = Base width: 2,800mm (9ft2).
  • B = Length: 1,989mm (6ft6).
  • C = Eaves height: 1,989mm (6ft6).
  • D = Ridge height: 2,500mm (8ft2).
  • E = Door width: 649mm (2ft1).
  • F = Door height: 1,810mm (5ft11).

Q. We have an old Alton octagonal cedar green house which is about 25 years old and is nearing the end of its useful life. My question is can a new one be fitted to the old Alton cast concrete base?

A. Hello, unfortunately the new Alton Octagonal greenhouses have an aluminium base plinth so wouldn't fit on the concrete kerbs they used to use.


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2 reviews of Alton Evolution Octagonal
Average rating: (5.0)

10/01/2023
by N Milnes

Top quality product with easy to follow assembly instructions. It was pleasure to build and the end result is a greenhouse we will enjoy for years to come.


24/12/2021
by Martin Simpson

Very good quality product. All parts were well finished and fitted together perfectly. Good, clear instructions.

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File Type: PDF

Alton Evo Octagonal 6x9 Dimensions drawing - Click here to view

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File Type: PDF

Alton Evo Octagonal 9x6 Base Plan - Click here to view

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Alton Evo Octagonal 9x6 Instructions - Click here to view

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Evo Octagonal Double Door Instructions - Click here to view

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Evo Octagonal Optional Extras Instructions - Click here to view

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Delivery of new greenhouses to Mainland England and Wales is FREE, parts of Scotland may be subject to a small charge. Delivery costs will be calculated and displayed at checkout before any payment is required

You will be contacted with a delivery date when your greenhouse is ready. This greenhouse is delivered straight from the factory on dedicated transport.

Please write in the comments box at checkout any dates (holidays etc.) you would like us to avoid.

Delivery to Northern Ireland may take longer.






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