Call to Order: 0800 098 8877
0800 098 8877
£15 OFF! Use code AUTUMN15 in the basket min order £449 (Greenhouses)
Swallow Raven 8x20 Wooden Greenhouse
Free Installation
Click to enlarge
- For illustration purposes.
Greenhouse Dimensions
A: Greenhouse width
2660mm (8′ 8″)
B: Greenhouse depth
6360mm (20′ 10″)
C: Ridge height
2660mm (8′ 8″)
D: Eaves height
1730mm (5′ 8″)
E & F: Door Size
1200mm (3′ 11″) x 1940mm (6′ 4″) (aperture)
Minimum Base Size
2660mm (8′ 8″) x 6360mm (20′ 10″)
Quick Code: P9013
Experience the ultimate in greenhouse luxury with the Swallow Raven - 8ft x 20ft of wide access, high performance timber, and automatic ventilation. With a 12-year warranty and free installation, this is the greenhouse of your dreams!
The paint is applied in Swallow’s specialist spray booth with an opaque protective top coat with a flexible microporous film. This paint finish is resistant to bacterial mold and UV sun damage. Custom colours are available for an additional cost and will be colour matched to your choice using Swallow’s in-house specialist paint.
Natural - £0
Oiled - £611.00
Lily White - £1528.00
Bracken - £1528.00
Olive - £1528.00
Midnight - £1528.00
Black - £1528.00
Stone - £1528.00
Summer Green - £1528.00
Cloud Grey - £1528.00
Slate - £1528.00
Robin’s Egg Blue - £1528.00
Premium options information
Premium Aluminium Cresting - £517.00
Finish of the styling of your Swallow greenhouse with the traditional premium aluminium cresting and finials.
Black Ornate Door Handle - £27.00
Add a black wrought iron ornate door handle. Price is for one handle per door
Additional Staging and Shelving information
Extra Side of Staging Oiled Finish - £522.00
Add another side of staging to the other side of your greenhouse.
High Level Shelf Oiled Finish - £263.00
Add a 250mm wide high level shelf for extra storage of plants, seeds and tools etc
Rainwater Systems information
White Rainwater System - £381.00
Add a White Rainwater System to collect and reuse all of that lovely rainwater. Rainwater is after all the best water for your plants.
Black Rainwater System - £381.00
Add a Black Rainwater System to collect and reuse all of that lovely rainwater. Rainwater is after all the best water for your plants.
Dwarf Wall Option information
Dwarf Wall Version - £0
Order this Greenhouse customised to sit on a brick dwarf wall. Select this option and we'll send you a wall plan to give to your brick layer to complete your wall. We'll then install a version of this greenhouse with a window sill straight onto the wall.
More Useful Extras information
Side Vent Oiled Finish - £122.00
This side vent opening window will give your greenhouse good ventilation by letting cool air flow in to regulate the temperature and humidity inside, without having to leave the door open.
Swallow Wren Cold Frame Oiled Finish - £383.00
Add a Wren Coldframe to give even more room for seedlings and plants. Dimensions: 2ft 1” X 4ft 5”
Swallow Sparrow Frame Oiled Finish - £450.00
4ft x 3ft Cold Frame with toughened Safety Glass.
Bench with Shelf Oiled Finish - £294.00
Add a useful work bench with lower shelf that you can move around the greenhouse to suit you. Dimensions: 1200mm x 540mm
External Shed Door (With Shed Extension Only) - £334.00
Add a door at the rear of your shed extension.
Additional Double Greenhouse Door Oiled Finish - £557.00
Add an additional double door to the rear of your greenhouse for access back and front.
Combination Shed information
Please note that you cannot have a dwarf wall version if you add a shed extension.
Combination Shed Extension 8ft x 4ft - £1311.00
Add this useful 8ft x 4ft combination shed to the back of your greenhouse for extra storage. Comes with Floor and 2 Side Shelves
Combination Shed Extension 8ft x 6ft - £1680.00
Add this useful 8ft x 6ft combination shed to the back of your greenhouse for extra storage space. Comes with Floor and 2 Side Shelves
Combination Shed Extension 8ft x 8ft - £2050.00
Add this useful 8ft x 8ft combination shed to the back of your greenhouse for extra storage. Comes with Floor and 2 Side Shelves
Combination Shed Extension 8ft x 10ft - £2420.00
Add this useful 8ft x 10ft combination shed to the back of your greenhouse for extra storage space. Comes with Floor and 2 Side Shelves
The 8ft x 20ft Swallow Raven is the largest greenhouse in the Raven range. It`s practical double door design gives easy access and it`s installed for FREE !
3mm Toughened glass is standard on all Swallow wooden Greenhouses and is held in special grooves within the frame and then sealed in place with quality silicone. Inward opening double doors with mortise locks are also standard.
Each roof vent is supplied with Bayliss XL autovents to automatically open the roof vents when you`re not around to stop overheating. You also get a full length of slatted staging down one side of the greenhouse for working on and storing your plants.
The Swallow Raven is the finest 8ft wide wooden greenhouse available today and when you consider it has a 12 Year Warranty and free installation, it`s not hard to understand why we rate Swallow wooden greenhouses so very highly.
- 2660mm (8ft 9") Wide Wooden Greenhouse - Wide access for wheelbarrows etc
- Oiled ThermoWood Construction - Heat treated high performance timber.
- 3mm Toughened Glazing - Safe, Strong and Family Friendly.
- 8 Opening Roof Vents - For Ventilation.
- 8 Bayliss XL Autovents - Automatically opens your roof vents.
- Double Doors with Mortise Lock - Wide access and Security
- Bottom Boards 12mm - Tongued and Grooved with stainless steel nails.
- Glazing Grooves to hold glazing - Solid and Silicone Sealed.
- Full length of Slatted Staging to one side - 520mm wide, 745mm high.
- 20mm Black PVC Damp Barrier - Screwed to bottom for rising damp protection.
- 12 Year Warranty - on frame and base.
- Installation Included in Price - Just order and everything is done for you !
Delivered and Installed within 5-8 weeks from the date that you confirm your base is ready for all finishes.
Greenhouse Dimensions
A: Greenhouse width
2660mm (8′ 8″)
B: Greenhouse depth
6360mm (20′ 10″)
C: Ridge height
2660mm (8′ 8″)
D: Eaves height
1730mm (5′ 8″)
E & F: Door Size
1200mm (3′ 11″) x 1940mm (6′ 4″) (aperture)
Minimum Base Size
2660mm (8′ 8″) x 6360mm (20′ 10″)
Swallow Installation Access Larks and Robins: The minimum access height required for installation
1727mm (5′ 7″)
Cygnet, Jay, and Kingfishers: The minimum access height required for installation, no access through a property.
2032mm (6′ 8″)
Mallard, Swan, Raven, Rook, Falcon, and Eagles: The minimum access height required for installation, no access through a property.
2672mm (8′ 9″)
Always use MM dimensions when planning and building your base: No right angle turns between the access point and installation site.
Please contact us if you have any questions regarding your base area or site.
Larks and Robins: The minimum access height required for installation
1727mm (5′ 7″)
Cygnet, Jay, and Kingfishers: The minimum access height required for installation, no access through a property.
2032mm (6′ 8″)
Mallard, Swan, Raven, Rook, Falcon, and Eagles: The minimum access height required for installation, no access through a property.
2672mm (8′ 9″)
Always use MM dimensions when planning and building your base: No right angle turns between the access point and installation site.
Please contact us if you have any questions regarding your base area or site.
Why is ThermoWood the Best?
ThermoWood is a thermally modified timber known for its durability and stability in harsh weather.
Oiled Finish
Oiling Wood enhances its natural beauty and prolongs its lifespan.
Autovents as Standard
Swallow use high quality Bayliss XL Automatic roof vent openers as standard on every roof vent. Even when you're not around your greenhouse will be well ventilated.
Staging Included
Swallow include a length of slatted staging with all greenhouses that is 520mm wide and 745mm high.
Installation Included
Swallow Greenhouses are delivered and installed countrywide for free. You simply order your new greenhouse and it will be delivered and erected in your garden by a Swallow fitting team.
Damp Barrier
20mm black PVC section screwed to the bottom of the greenhouse stops damp rising into the timber.
Swallow Products
Swallow GB Ltd prides itself on its attention to detail, offering products that are not only functional but also enhance the beauty of any garden. Their greenhouses are built to last, with features like toughened safety glass and automated ventilation systems, ensuring an optimal growing environment..
12 Year Warranty
Swallow products come with a 12 year warranty that covers the Timber for Rot, Decay and Insect Infestation. Buildings must be re-treated inside and outside annually with a high-quality wood preserver according to the maintenance advice
Frequently Asked Questions
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What is the best base for a Wooden Greenhouse?
Wooden Greenhouses are very heavy, so the base needs to be solid! We recommend a base of either concrete or well-laid slabs. However, for smaller greenhouses, decking can also be a good option. If you want soil inside your greenhouse, you can make a perimeter base from bricks laid onto concrete footings.
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What size should my base be?
If you look at the Greenhouse Dimensions diagram on this page you will see "Minimum Base Size", use that. We will also email/post you a base plan for you to work from. Easy!
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How do I maintain my Wooden Greenhouse?
We recommend that you apply a good quality wood preserver within 3 months of your greenhouse installation. Then apply a protective coat yearly thereafter. It’s easy to do and your greenhouse will love you for it!
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What access do our fitters need to install the greenhouse?
First things first, these greenhouses cannot be brought through your house or garage, as the panels are too large to fit through any normal doorway. We need a straight-through run with no height restrictions or right-angle turns as the panels are too long/high to go around tight bends.
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I want a dwarf wall model, how does that work?
OK, so if you select the Dwarf Wall Option for your new greenhouse you will receive a Wall Plan by email and post. You can give this Wall Plan to your builder and they will be able to build a wall to the exact size we need to install your greenhouse onto.
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I don’t see the paint colour I want, can you help?
No problem, if you get the RAL code for the paint colour you want we can paint the greenhouse in that colour. This service does attract a 15% increase in the paint price.
