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Lean To Greenhouses
Aluminium lean To's
Browse our excellent range of the Best Lean to Greenhouses for sale from the world's leading aluminium greenhouse manufacturers such as Vitavia, Access, Janssens and Elite greenhouses.
About Our Lean-To Greenhouses
✅ Space-efficient heat lovers: A lean-to greenhouse attaches to an existing wall (house, garage, or shed), using radiant heat from the supporting structure to boost temperatures. Models range from 2ft to 8ft wide, from compact mini lean-to greenhouses for balconies to substantial, garden-room style designs like the Elite TITAN K800.
The Vitavia IDA lean-to greenhouses start from under £300 for compact 4ft × 2ft models, with larger 10ft × 6ft versions available under £800. Elite lean-to ranges, including the Windsor low-height model at just 6ft 8″ ridge height and the Kensington 6ft wide range, typically start around £800–£1,000. All models feature aluminium frames with 10–12 year warranties and your choice of horticultural glass, toughened safety glass, or polycarbonate glazing.
💡 Built-in climate edge: Lean-to designs commonly run about 5°C warmer than outdoor conditions by combining wall warmth with solar gain—ideal for tomatoes, peppers, cucumbers, and overwintering tender plants. Free UK mainland delivery and professional installation services are available.
Choosing Lean-To Greenhouses: Quick Guide
Size & Wall Orientation
🧭 Pick the right wall, reap the rewards: South-facing walls deliver 6–8 hours of direct sun for heat-loving crops. East-facing suits morning growers (salads); west-facing favours afternoon sun plants. North-facing? Choose shade-tolerant crops or add grow lights.
Price & Quality Tiers
- Entry-level (2–4ft wide): under £300.
- Mid-range (4–6ft wide): £500–£1,000 with improved ventilation and staging.
- Premium, e.g. Elite TITAN K800 (8ft wide): £2,500+, typically with double doors, multiple vents, and conservatory-style glazing.
Foundation Requirements
🧱 Get the base and wall right first: Your lean-to needs a level, solid base and a flat wall meeting the base at 90° for a weather-tight seal.
- Paving slab base (DIY-friendly): £150–£300.
- Concrete base (professional-grade): £300–£600.
- Greenhouse Stores offers 15 years of Vitavia installation experience—call 0800 098 8877 for advice.
Frequently Asked Questions
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How much do lean-to greenhouses cost in the UK?
Lean-to greenhouses start from under £300 for compact 2ft-wide models and range up to £3,000+ for premium 8ft conservatory-style structures. Most buyers opt for mid-range 4–6ft wide models (£500–£1,200) for a balance of space and value. Budget £200–£400 for professional installation and £150–£300 for base construction. Free UK delivery is available across the range.
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What's the best wall for a lean-to greenhouse?
South-facing is ideal, providing 6–8 hours of direct sunlight and the warmest conditions. The wall must be flat for proper sealing (rubber gasket supplied) and should meet the base at a right angle. East-facing suits morning crops; north-facing positions favour shade-tolerant plants or supplemental lighting.
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Do lean-to greenhouses cause damp problems?
No—when installed correctly. Kits include rubber gaskets that seal frame to wall and integral guttering to divert rainwater from foundations. Proper ventilation (roof vents and louvres) limits condensation. For restricted ridge heights, consider low-height lean-to models (under ~7ft).
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Can I install a lean-to greenhouse myself?
Yes—DIY in 8–12 hours for two people with basic tools. Vitavia IDA models are straightforward (follow diagrams carefully). Elite Kensington and Windsor need more precision (powder-coated frames, larger panes). Professional installation (£300–£600) covers base levelling, frame assembly, glazing, and sealing. Greenhouse Stores provides UK-mainland installation with 15 years of specialist experience.
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What can you grow in a lean-to greenhouse?
Excellent for tomatoes, peppers, cucumbers, chillies, and aubergines—all warmth lovers. The wall’s radiant heat can extend the season by 6–8 weeks, enabling seed starts from February. Use higher ridge space (6–8ft) for cordon tomatoes; train cucumbers along roof lines. Add shelves for propagation and overwintering. See our complete greenhouse growing guide.
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Are polycarbonate lean-to greenhouses any good?
Yes—high insulation, low weight. Polycarbonate can offer ~70% better insulation than glass, potentially cutting heating needs by 30–40%. The Palram Canopia Sun Room uses 4mm twin-wall sheets that block 99.9% UV and diffuse light for even growth. It’s virtually unbreakable and ~50% lighter than glass, easing DIY. Choose glass for traditional aesthetics or where required over doorways.
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