About Our Swallow Raven Combi Greenhouses
The Swallow Raven Combi Greenhouse combines an 8ft 9in wide professional growing space with an integrated storage shed, giving you two buildings in one smart footprint. This combi greenhouse range is perfect for gardeners who need wide wheelchair-friendly access and organised tool storage. Key features include:
- ThermoWood Timber Construction: Heat-treated for a 25–30 year lifespan.
- 3mm Toughened Safety Glass: Professional-grade glazing held in sealed grooves.
- Automatic Roof Vents: Bayliss XL autovents for hands-free temperature control.
- Integrated Shed Extension: Fully boarded with tongue and groove flooring and polyurethane roof covering.
💡 Swallow Raven Combi Configurations
Swallow Raven 8x4 Greenhouse + 4ft Shed Combination: Our most compact model at 8ft 4in total depth.
Swallow Raven 8x6 Greenhouse + 4ft Shed Combination: Adds 2ft more greenhouse space for £600–800 extra.
Swallow Raven 8x8 Greenhouse + 4ft Shed Combination: A popular all-round choice for serious growers.
Swallow Raven 8x10 Greenhouse + 4ft Shed Combination: Extended growing space up to 14ft 7in total depth.
Swallow Raven 8x12 Greenhouse + 4ft Shed Combination: Our largest Raven Combi at 16ft 9in total depth.
✅ Every Swallow Raven Combi includes full-length slatted staging (520mm wide, 745mm high), giving you dedicated potting and display space. The shed section includes two full-length shelves and a separate external lockable door (2ft 6in wide)—perfect for storing fertilisers and tools securely without entering through the greenhouse. You'll get double greenhouse doors (3ft 11in wide) for easy wheelbarrow access, and a comprehensive 12-year timber warranty. FREE professional installation is included anywhere on the UK mainland.
Models arrive with an oiled finish as standard, though you can upgrade to ten optional paint colours:
- Lily White
- Lulworth Blue
- Vert De Terre
- Bracken
- Olive
- Railings
- Anthracite
- Moles Breath
- Purbeck Stone
- Oxford Stone
Choosing Swallow Raven Combi Greenhouses: Quick Guide
Swallow Raven Combi Greenhouses range from £4,200 for the 8x4 model to £6,500+ for the 8x12 configuration. Most customers choose the 8x6 or 8x8 models (£4,800–£5,600) which balance growing space with shed storage. The 8ft 9in width gives you 35% more floor space than standard 6ft models, making these combis ideal for wheelchair users and those who regularly use wheelbarrows.
💡 Size selection depends on your growing ambitions and available garden space. The compact Swallow Raven 8x4 Combi works well for small gardens (just 8ft 4in deep), while the 8x10 and 8x12 models suit allotment holders who need serious production space. All Swallow Raven Combi Greenhouses share the same 8ft 9in width—the only difference is greenhouse length.
Quality indicators include ThermoWood construction (heat-treated at 190°C for decay resistance), 3mm toughened safety glass (six times stronger than horticultural glass), and Bayliss XL automatic vents (opening at 15°C). Your base needs to be completely level—we recommend concrete or paving slabs for the best results. Delivery takes 8–12 weeks after you confirm your base is ready. You'll pay just 20% deposit with your order, then the balance after installation is complete—so you'll only pay in full once you're satisfied.
Browse our complete Swallow Greenhouses range or explore the Swallow Jay Potting Shed collection if you need maximum storage with limited growing space.
Frequently Asked Questions
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How much do Swallow Raven Combi Greenhouses cost?
Swallow Raven Combi Greenhouses range from £4,200 for the 8x4 model to £6,500+ for the 8x12 configuration. Most customers choose mid-range models (£4,800–£5,600) which offer excellent space for both growing and storage. All prices include 3mm toughened glass, automatic vents, full staging, and FREE professional installation across mainland UK.
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What's the difference between Raven Combi models?
All Swallow Raven Combi Greenhouses are 8ft 9in wide—the only difference is greenhouse length (4ft, 6ft, 8ft, 10ft, or 12ft). The shed section is always 4ft deep with a lockable door. Longer models give you more growing space and staging but require deeper bases. Each 2ft increase adds roughly £600–800 to the price and extends your potting bench accordingly.
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Do Swallow Raven Combi Greenhouses need maintenance?
ThermoWood itself is highly resistant to rot for 25–30 years. The oiled finish arrives ready to use and should be refreshed every 3–5 years to maintain colour and water-repellency. You'll also need to clean glass twice yearly and check door seals annually. The shed's polyurethane roof covering lasts 15+ years without replacement (unlike traditional felt which needs changing every 5 years).
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Can I install a Swallow Raven Combi myself?
Professional installation is included FREE with every Swallow Raven Combi Greenhouse, saving you 20–30 hours of DIY work. Self-installation isn't recommended—these structures weigh 800–1200kg and require two experienced installers with specialist tools. The warranty only applies if professionally installed. You'll need minimum access height of 8ft 9in for delivery—no access through properties is possible.
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What base do I need for a Swallow Raven Combi?
You'll need a perfectly level concrete or paving slab base matching your model's dimensions (e.g., 8ft 9in × 8ft 4in for the 8x4 model). The base must be within 5mm level tolerance across its entire surface. Concrete bases cost £400–700 professionally laid, or you can DIY a paving slab base for £200–400 in materials.
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How long is the warranty on Swallow Raven Combi Greenhouses?
Every Swallow Raven Combi Greenhouse comes with a 12-year warranty covering timber frame and base boards against rot and structural failure. Glass carries a 1-year breakage warranty, and automatic vents are covered for 2 years. The warranty only applies if the greenhouse is professionally installed and receives basic annual maintenance. Painted finishes extend timber protection but don't increase warranty length.
Need advice? Call our greenhouse specialists on 0800 098 8877 or explore our greenhouse growing guides for year-round cultivation tips.