The Swallow Cygnet is a 6ft 8in wide T-shaped ThermoWood® greenhouse available in 9 sizes. Prices range from £9,829 up to £12,187. The T-shaped design combines a main greenhouse section with a perpendicular porch wing for a striking orangery appearance. Every model includes 3mm toughened safety glass, automatic roof vents, full-length slatted staging, lockable doors and free professional installation. Built in Rotherham with a 12-year warranty.
The Cygnet is the entry point to Swallow's T-shaped range. When we fit one, the porch section creates a natural entrance area for potting and storage. The main greenhouse section has the same high eaves and growing space as the standard range. It is a genuine orangery at a fraction of the price of a brick-built structure.
ThermoWood® is heat-treated at 215°C to remove moisture and resin. It will not warp or rot. Natural, oiled and painted finishes are available. For a wider T-shaped greenhouse, see the Swallow Mallard. For a painted Cygnet, see the Swallow Cygnet Painted range. Browse the full Swallow Greenhouses collection.
Need Help Choosing?
Or call our team free on 0800 098 8877
The Swallow Cygnet Greenhouse is a T-shaped timber orangery hand-built in Rotherham by skilled carpenters and joiners. The distinctive design features a 6ft 8 inch wide gable section with an apex-roofed porch. This creates two separate growing zones in a single structure. We have been fitting Swallow greenhouses for over 12 years. The Cygnet remains one of the most requested models from gardeners wanting a traditional Victorian look.
Every Cygnet is constructed from Scandinavian ThermoWood heat-treated at 215C. This process removes moisture and resin, making the timber naturally rot-resistant without chemical preservatives. Standard features include 3mm toughened safety glass, automatic roof vents, and full-length slatted staging. A mortise lock door with stainless steel handle is fitted. Prices range from £9,829 to £12,187, with free professional installation included. Browse our full Swallow Greenhouses range or explore all Wooden Greenhouses we stock.
"When we fit a Cygnet, the porch section always gets a great reaction. Customers tell us it transforms the greenhouse from a growing space into a proper garden room. The T-shape creates a natural entrance hall where you can pot up seedlings without disturbing your main crops. After fitting dozens of these, I always recommend a base 100mm larger than the footprint. This gives our lads room to work."
-- Matt, Greenhouse Stores
| Model | Width | Length | Price (inc. Install) |
|---|---|---|---|
| Swallow Cygnet 6x11 | 6ft 8" | 11ft 5" | £9,829 |
| Swallow Cygnet 6x15 | 6ft 8" | 15ft 8" | £ |
| Swallow Cygnet 6x19 | 6ft 8" | 19ft 10" | £ |
For a painted finish, see our Swallow Cygnet Painted Greenhouse range. Painted models include factory-sprayed colour at no extra cost over the painted price.
The Cygnet's T-shape base is more complex than a standard rectangle. We always recommend a concrete base rather than slabs for these models. The porch section joints need to sit perfectly level. If using paving slabs, make sure the porch-to-main junction sits on a single unbroken slab. This prevents movement that could stress the glazing bars over time.
The T-shape refers to the greenhouse's floor plan when viewed from above. The main growing section runs in one direction. The apex-roofed porch extends outwards from the centre, forming a T. This gives you a dedicated entrance area with staging, separate from the main wings. The design dates back to Victorian orangeries. It remains popular because it maximises growing space while creating a practical potting zone.
Installation typically takes 1-2 days depending on the model size. Our team arrives with all pre-cut components and erects the complete structure on your prepared base. You will receive 2-3 weeks notice of the confirmed installation date. The full process from order to completion is 8-12 weeks.
No chemical treatment is ever required. The heat treatment at 215C makes ThermoWood naturally resistant to rot and decay. The standard oiled finish will silver gracefully over time if left untreated. You can re-oil annually to maintain the honey-brown colour, or choose a factory-painted Cygnet for a more traditional look.
You need a flat, level concrete or paving slab base. The T-shaped footprint requires precise dimensions. We send a base plan with your order confirmation showing exact measurements. Our guides on building a concrete greenhouse base and laying a paving slab base cover both options in detail.
Every Cygnet includes the frame, glazing, staging, vents, and free installation. You get 3mm toughened safety glass, automatic roof vent openers, and full-length slatted staging. Guttering, downpipes, and a mortise lock door are also standard. Professional delivery and erection is included for UK mainland. The 12-year manufacturer warranty covers the ThermoWood frame.
