Verified Customer
Very pleased with the Greenhouse. The installation was ably carried out by your expert team - grateful thanks.
About our swallow mallard greenhouses
The Swallow Mallard Greenhouse is the mid-size T-shaped orangery in the Swallow range. Built in Rotherham by skilled carpenters and joiners, it features an 8ft gable width that gives you serious growing space. The T-shaped layout creates a main greenhouse section with a separate porch for potting and storage. We have installed more Mallards than any other T-shaped model over the past 12 years.
Every Mallard is constructed from Scandinavian ThermoWood heat-treated at 215C. This removes moisture and resin, making the timber naturally rot-resistant without chemical preservatives. Standard features include 3mm toughened safety glass, automatic roof vents, full-length slatted staging, and a mortise lock door. Prices range from £8,847 to £16,161, with free professional installation included. Browse our full Swallow Greenhouses range or explore all Wooden Greenhouses we stock.
"The Mallard is our most popular T-shaped model. The 8ft gable width is wide enough for staging on both sides with room to walk between. When we fit these, customers are always surprised how much bigger they feel inside compared to a standard rectangular greenhouse. The porch creates a natural mudroom where you can keep compost bags and tools without cluttering your growing space."
-- Matt, Greenhouse Stores
Swallow mallard sizes and prices
| Model | Width | Length | Price (inc. Install) |
|---|---|---|---|
| Swallow Mallard 8x11 | 8ft | 11ft | £8,847 |
| Swallow Mallard 8x15 | 8ft | 15ft | £10,996 |
| Swallow Mallard 8x19 | 8ft | 19ft | £11,666 |
For a factory-painted finish, see our Swallow Mallard Painted Greenhouse collection. For a smaller T-shape, consider the Swallow Cygnet at 6ft 8 inch width.
Matt's Installation Tip
With the Mallard's T-shaped base, make sure your groundworker has the base plan from Swallow before starting. The porch dimensions must match exactly or the frame will not sit square. We see this mistake a few times each year. A base that is even 20mm out can cause doors to bind and glazing bars to flex. Always check the diagonal measurements are equal before our team arrives.
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What makes the Swallow Mallard different from the Cygnet?
The Mallard is wider at 8ft compared to the Cygnet's 6ft 8 inches. This extra width gives you room for staging on both sides with a clear walkway down the centre. The Mallard suits medium to large gardens where you want maximum growing space in a T-shaped design. The Cygnet is better for narrower plots where width is limited.
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How is the Swallow Mallard delivered and installed?
Delivery and installation are free and take 8-12 weeks from order. Components arrive on a flatbed lorry and our team erects the full structure on your prepared base. Installation typically takes 1-2 days. You pay just 20% deposit when ordering, with the balance due only after installation is complete.
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What are the benefits of the T-shaped porch?
The porch creates a separate zone for potting, storage, and access. It extends outward from the centre of the main greenhouse, forming the top of the T. You can use it as a mudroom, a potting area, or even a small seating spot. The porch staging is included as standard, giving you additional bench space for seedlings and cuttings.
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Does the Mallard need a special base?
Yes, the T-shaped footprint needs a precisely dimensioned base. We supply a detailed base plan with your order. A concrete base or paving slabs both work well. Our guides on concrete bases and paving slab bases cover the process step by step.
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Can I add a painted finish to the Mallard?
Yes, painted finishes are available in 10 factory-sprayed colours. Options include Lily White, Bracken, Sage, and Anthracite. The paint is applied at the Swallow factory in Rotherham before delivery. See our Swallow Mallard Painted Greenhouse range for pricing and colour options.