Swallow 8'-9 x 18'-10 Raven
Swallow 8'-9 x 18'-10 Raven
Swallow 8'-9 x 18'-10 Raven
Swallow 8'-9 x 18'-10 Raven
Swallow 8'-9 x 18'-10 Raven
Swallow 8'-9 x 18'-10 Raven
The 8x18 is 9 bays long (away from door). Main photo shows a 8x12 which is 6 bays long.

Swallow 8'-9 x 18'-10 Raven

(6 Reviews)
10% Off Limited Sale!  Use code SWALLOW10 - ends June 30th!

2 x Payment Options.

1: Choose to pay the full balance with your order via our secure checkout. OR
2: Choose to pay 20% deposit with the balance payable to Swallow on installation. Select the "Wooden Deposit" option when you get to the payment page in the checkout. Deposit paid later when we contact you.

Select your options: (additional info below)

We only partner with the best British manufacturers!
Lead Times
8-12 Weeks All Finishes
West of A377 Devon
8-12 Weeks
Swallow 8x18 Raven greenhouses are traditionally built using Thermowood glazing bars of a sturdy 58mm x 32mm thickness. Thermowood is a heat treated timber that is extra strong and durable with a consistent attractive finish, heat and steam modify the timber to greatly reduce the water and resin content, this leaves a very stable wood that is perfect for outdoor buildings and is expected to last for decades!
Some of the features that are included in the price are:-
  • Plenty of roof vents on each model, each vent comes with an automatic opener
  • Full length of staging down one side
  • Long pane toughened glass
  • 20mm PVC damp proof barrier
  • Delivered and installed by Swallow
  • Large Hinged Double Doors 
A fully fitted combination shed can be added to the back of your greenhouse.
Swallow greenhouses have a high eaves height for more comfortable working space, are boarded around the bottom and can be purchased with the natural wood finish which is fully oiled, or you can choose to have your greenhouse painted in a choice of attractive colours. The 8x18 Raven is supplied with six roof vents

Our View

The 8x18 Swallow Raven is a top quality wooden greenhouse...don't confuse them with some of the competition that are made to a price. Excellent features and installed free by Swallow!

Roof Windows
6 Standard
6 Bayliss
Staging Included
Down 1 Side
Toughened Glass
Safety & Looks
Thermowood Frame
Long Lasting & Attractive
Greenhouse Boarded All Around
12mm Thick Tongue & Groove
Large Double Hinged Doors
Inward Opening
Aluminium Door Handles
Glazing Slid Into Groove
Silicone Sealed
Turned Apex Finial
Classic Look
Machined Timber Capping
Ridge & Roof Vents
20mm PVC Damp Barrier
Keeps Wood Above Standing Water
Delivered & Installed
Hassle Free
Quality Paint Finishes
Enhanced looks
5 Year Warranty

A: 2660mm (8ft 9")

B: 5730mm (18ft 10")

C: 2660mm (8ft 9") 

D: 1730mm (5ft 8")

E: 1980mm (6ft 6")

F: 1200mm (3ft 11") 

 mm exact : inches approx


Swallow greenhouses are delivered and installed at the same time by Swallow. A firm and level base area will need to be ready such as slabs, concrete, decking, sleepers or similar.

 Nobody delivers faster than South West Greenhouses!

Our goal is that all orders are processed the same day as we take your completed order (or Swallows next working day)
We don't "sit" on them as some suppliers do, this means that you get your greenhouse in the quickest delivery time possible.

Free delivery to the whole of mainland UK as far North as Stirling Scotland - Contact us for North of Stirling deliveries

Expected delivery time for Swallow greenhouses

8-12 Weeks for Oiled Finish buildings

8-12 Weeks for Painted Finish buildings

Deliveries West of A377 in Devon are 8-12 Weeks for all finishes

Lead times are from confirmation of base being completed

Combi Shed Info

Swallow Raven With Combination Shed Examples

Add a practical shed on to the back of your greenhouse, these are of the same quality of your greenhouse with the door on the inside of the greenhouse.
Choose to add a rear door for access to the shed from your garden.
Supplied with a fitted floor and 2 shelves as standard, the roof covering is a high quality vinyl for durability. 
Choose if you want any fixed or opening windows in your shed (we will confirm position with you)
Available in a choice of 4ft3" - 6ft4" - 8ft4" - 10ft5" length's.
Can be oiled or painted to match.
If you have ordered guttering or cresting for your greenhouse you can add a shed extension to run the full length of your building.


^ Swallow Raven 8x6 with shed
^ Swallow Raven 8x6 with shed
^ Swallow Raven 8x6 with shed
^ Swallow Raven 8x8 with shed
^ Swallow Raven 8x8 combination shed
^ Swallow Raven 8x8 combination shed
^ Swallow Raven 8x8 combination shed
^ Swallow Raven 8x8 combination shed
^ Swallow Raven 8x10 combination shed
^ Swallow Raven 8x10 combination shed


Options Information


Choose to have your greenhouse in oiled finish Thermowood or painted in one of 9 attractive colours (some exclusive to us)

You can select "Choose After Receiving Samples" if unsure, and then choose your final colour when received.

The Thermowood frame is treated professionally by Swallow with a top quality oil, this will help protect the frame from the elements, preserving the colour of the wood and reducing water stains and sun bleaching.

We also offer a colour matching service, using Swallows in house paint facility we can match most colours if you are trying to coordinate! Phone us with your choice. Swallow have their own spray booth facility which enables them to paint their greenhouses to a high quality finish. Painted before glazing and sometimes in component form for a seamless finish.

The paint used is a water borne acrylic which has a flexible microporous protective film, this top quality paint is resistant to bacterial mould and UV attack.

Included Staging

This building comes with a length of staging included, this is supplied as Thermowood as standard with all finishes, at a small extra cost this can be painted to match your frame colour. Photo shows how the staging and shelf looks in Thermowood against a painted building

High Shelf

Add a High Level Shelf to your greenhouse for extra storage. Perfect for all those pots and tools you can choose to add one shelf which runs the whole length of your greenhouse or choose two so you can have one each side.

Can be painted to match your chosen frame colour.

Extra Staging

If you need more work space for your potting and planting you can choose to add another full length of staging to add to the one you get as standard.

Can be painted to match your frame.

Gutter System

Don't waste all that water that you can get off your greenhouse roof, add the quality PVC Gutter System to your order. The gutter is added to both sides of the greenhouse with a downpipe each side.  Available in black or white.

Side Vents

Ventilation is important for every greenhouse to increase airflow and to control the inside temperature.
Choose to add these low level opening side/rear windows. (we will confirm position of windows with you). Choose painted option with a painted frame.

Ornate Door Handle

An attractive ornate black door handle is available to add to your order.

Extra Rear Doors

An extra pair of rear doors can be added to your greenhouse to enable you to have access at both ends.

Choose painted option with a painted greenhouse.

Aluminium Crestings

Add a full length of black quality aluminium crestings to your greenhouse ridge.

Creating a stylish attractive look with the added benefit of deterring birds!


These high quality 2 tier slatted benches are freestanding and can be placed where you wish, these are suitable for inside or outside use.

Available in 4ft or 6ft lengths.
Can be painted to match.

Sparrow and Wren Cold Frames

Matching cold frames sturdily built with toughened glass hinged roofs.

  • Sparrow is 4'5 long by 2'1 wide
  • Wren is 4'5 long by 3'4 wide

Can be painted to match.

Similar models:

swallow raven greenhouses | 8ft wide greenhouses | toughened glass greenhouses | swallow greenhouses | wooden greenhouses | greenhouses

Customer Reviews
Write a Review and share your opinions!
6 Reviews:

Swallow Raven
19 July 2017  |  Maria

wow fantastic green house. fantastic team who fitter it. 10/10 all round well pleases from maria b,x

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The wait was worth it......
16 March 2017  |  Mathew

Fantastic build quality, the shed extension is brilliant, and the attention to detail is first class. The thermowood look and feel makes it look more expensive than it is and certainly competes with some RHS 'certified' versions where you will pay 4 x the price! The large building was erected in less than 4 hours and the guys arrived promptly.

1 of 1 people found this review helpful.
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First ever greenhouse
26 September 2016  |  Sue

Love it!! Delivery arrived smack on time and had built in 1.5 hours.
My only regret was not ordering a side vent but may go for it at a later date.
Already full of cuttings and seeds

1 of 1 people found this review helpful.
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Swallow Raven Greenhouse
01 September 2015  |  Susie

Thrilled with my greenhouse. Arrived exactly when stated and erected with the minimum of fuss. Excellent service and very high quality product. Now all I have to do is enjoy using it........

1 of 1 people found this review helpful.
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Happy new greenhouse owner
10 June 2015  |  Andrew

Very impressed with the greenhouse and service provided by Swallow. They arrived right on time and it was built within a couple of hours and looks great. Absolutely the right choice!

1 of 1 people found this review helpful.
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A brilliant greenhouse!
06 January 2015  |  Bebe

4 weeks in and I absolutely love this greenhouse. It feels really solid and spacious. We used new sleepers as a base and this has given us additional height.
The greenhouse arrived ahead of schedule and on the day the 2 guys arrived, with the greenhouse pre-glazed, promptly at 8am as promised and they were brilliant. By afternoon I had started moving my plants in. Thank you

1 of 1 people found this review helpful.
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