Swallow Greenhouses represent the pinnacle of British timber craftsmanship, solving the age-old problem of wooden greenhouses: Rot. Unlike standard pressure-treated timber, Swallow uses Scandinavian ThermoWood®, which is "cooked" at 215°C to remove moisture and resin. This thermal modification kills the nutrients that fungi feed on, making the timber structurally stable and rot-resistant for decades without chemical treatment. Every model includes Free Professional Installation, so your greenhouse is erected perfectly by the same craftsmen who built it.
Swallow build every greenhouse in their own Yorkshire workshop. The frames use ThermoWood, a Scandinavian timber heat-treated to remove the moisture and sugars that cause rot. We have fitted these buildings for years, and the difference in stability against standard timber is clear on site. Prices in the Swallow range start from £2,575. The range runs from the compact wooden greenhouses through to the larger Eagle and Mallard models.
Every Swallow order includes free professional installation south of Glasgow. Our team delivers the pre-built panels and erects the greenhouse on your prepared base, usually in a day. Choose between styles such as the elegant Victorian greenhouses or the planted-bed dwarf wall brick greenhouses. All models carry a 12-year warranty on the timber frame.
Why We Chose This Range
"Most wooden greenhouses arrive flat-packed as hundreds of loose parts. Swallow is different. They make the panels in Yorkshire and send their own fitters to build it on your base. That removes the DIY risk and keeps the 12-year warranty valid from day one. The ThermoWood frame also stays stable through wet British winters."
Matt, Founder of Greenhouse Stores💡 Tip: Order the painted finish if you want a low-maintenance frame. It stays sound for five to seven years before a refresh. The oiled finish costs less but needs re-oiling every year or two.
Your base must be ready before the Swallow team arrives. They work to tight tolerances. We check the slab is level within 13mm across the whole footprint, measuring the diagonals with a long spirit level. A sloping base stops the panels aligning and can crack the glass. An unready base may trigger a revisit charge, so get this right first.
Best For: a serious year-round grower with room for staging both sides
Why I Recommend It: it is the size most of our buyers wish they had bought first. The 6ft width takes a path plus benching, and the toughened glass and auto vents come as standard.
Price: from £3,154
| Range | Width | Best for | From |
|---|---|---|---|
| Lark | 4ft | Small gardens and tight plots | £2,575 |
| Kingfisher ⭐ Matt's Pick | 6ft | Year-round growing with staging both sides | £2,764 |
| Raven | 8ft | Wider growing space and walk-around room | £3,579 |
| Eagle | 8ft | Premium tall eaves and a grand finish | £6,148 |
They are built from ThermoWood, not cedar. This is Scandinavian pine heat-treated to over 200°C. The process removes moisture and resin, so the timber resists rot and warping without chemical preservatives. It stays stable through damp British winters.
Yes, free professional installation is included south of Glasgow. The Swallow team delivers the pre-built panels and erects your greenhouse on a prepared base. Most builds finish in a single day.
Yes, a level concrete or paved base is required. The greenhouse cannot sit on grass, soil, or gravel. Swallow send a base plan after you order so you can prepare the ground.
The timber frame carries a 12-year warranty against rot and decay. Glass and moving parts are covered for the standard statutory periods. The structure itself is guaranteed for the long term.
You pay a 20% deposit on order to book your build slot. The remaining 80% is not due until the greenhouse has been delivered and installed in your garden.
Call our team on 0800 098 8877. We have fitted every Swallow range and can match the right model and base to your garden.
