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Combined Greenhouse Shed

A Combined Greenhouse Shed is the ultimate space-saving solution for British gardens, merging a professional growing environment with secure storage in a single footprint. We strictly stock ThermoWood® models (like the Swallow range) because their heat-treated timber resists the warping that plagues cheaper "dual-purpose" buildings. With toughened safety glass and free professional installation included, these combi greenhouse units offer a seamless join between your potting area and tool store.

ThermoWood Rot-Free Timber Frame
12-Year Warranty Manufacturers Guarantee
Free UK Installation Delivered & Erected
Dual Purpose Grow & Store
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Why We Chose This Range

“We strictly champion the Swallow Combination range because they solve the biggest engineering flaw of hybrid buildings: the join. Standard timber expands and contracts, which usually tears the roof felt where the greenhouse meets the shed. Swallow uses ThermoWood®—timber baked at 215°C to remove moisture—making it chemically inert. It doesn't move. That means your combined unit stays watertight and structural for decades, not just seasons.”

— Matt, Founder of Greenhouse Stores
Matt's Installation Tip: Orientation Matters

With a combined unit, orientation is critical. You must position the greenhouse section to face South or West to maximise light intake for your crops.

If you orient the building so the shed section blocks the midday sun from hitting the glass, you'll struggle to get tomatoes to ripen. Plan your base so the wooden shed acts as insulation on the North side, protecting your plants from cold winds. Read our full base guide here.

Common Questions About Combined Greenhouse Sheds

Do I need a floor in the greenhouse section of a combo?

No. We recommend keeping the greenhouse section floorless (sitting directly on your concrete or slab base). This allows for proper drainage when watering and lets you wash down spillages easily. The shed section, however, usually comes with a robust timber floor included to keep your tools and equipment dry.

Can I insulate the shed section later?

Yes. Because the frames on our combined units (specifically the Swallow range) use standard timber studding, you can easily retrofit insulation. We often see customers adding Rockwool and ply-lining to the internal walls of the shed section. This creates a frost-free overwintering room for tender plants or a comfortable workspace for year-round potting.