6ft Wide Lean To Greenhouses

Why choose a 6ft wide lean-to greenhouse?

A 6ft wide lean-to gives you the same growing capacity as a standard 6ft freestanding greenhouse, but against a single wall. At 1,800mm deep, you can run double staging benches along each side with a comfortable 600mm central walkway, or dedicate the full depth to grow bags with a narrow path at the front. It's a proper working greenhouse, not a compromise.

The wall behind the structure acts as a significant thermal mass at this width. Across the thousands of installations we've overseen since 2012, 6ft lean-tos consistently hold temperatures 4-6°C warmer than equivalent freestanding models during autumn and winter. That heat bonus extends your UK growing season by roughly 5-7 weeks, you can sow from mid-February and harvest into late November in most of southern and central England. Winter heating costs run 30-40% lower than a freestanding greenhouse of the same floor area because you're only heating three glass sides instead of four.

We stock 31 models at this width from three specialist brands, with lengths ranging from 6x6 (36 sq ft) up to 6x20 (120 sq ft). At the longer sizes, a 6ft lean-to essentially functions as a growing corridor along the full back of a house, a layout that's increasingly popular with customers who want serious growing capacity without a separate greenhouse structure in the garden.

6ft lean-to brands and ranges

Elite kensington, our best-selling 6ft lean-to range

Elite manufactures the Kensington lean-to range in Barnsley, South Yorkshire. It's the only Elite lean-to range available at 6ft width, the Windsor tops out at 4ft wide, so the Kensington is your option if you need the extra depth from Elite. Every frame is made to order in your choice of 26 powder-coated colours at no additional cost.

The Kensington features a tall ridge height for comfortable headroom (even for gardeners over 6ft), a wide door opening for wheelbarrow access, and box-section aluminium frames that are noticeably more rigid than imported alternatives. Available from 6x6 (£729 in horticultural glass) up to 6x20 in horticultural glass, 3mm toughened safety glass, or 6mm twin-wall polycarbonate. 25-year frame warranty. Delivery within 5 weeks of order.

Vitavia IDA 5200

Vitavia offers the IDA 5200 as their 6ft lean-to, available in 6x8 and 6x10 sizes. Priced from £684 in horticultural glass, the IDA 5200 is the most affordable 6ft walk-in lean-to we sell. The aluminium frame is lighter-gauge than the Elite, but it's still a solid structure with a 12-year manufacturer warranty. Available in silver aluminium or black. Stock held in the UK with delivery in 1-6 weeks.

The Vitavia is a good choice if you want a 6ft lean-to at a lower price point and don't need the extended length options. It won't match the Kensington on frame rigidity or colour choice, but at £684 vs £729 for a comparable 6x8, the saving is modest. The black finish option is worth noting, it's one of the few 6ft lean-tos available in a dark frame colour at this price.

Palram canopia sun room

The Palram Canopia Sun Room is a different product to a traditional lean-to greenhouse. It uses clear polycarbonate wall panels and a solid roof, creating a hybrid space that works as both a covered garden room and a growing area. Available from 6x6 (£1,175) to 6x12 (£1,750), these are popular with customers who want a sheltered patio area that doubles as a year-round growing space. Delivery within 7-10 working days.

Important distinction: The Sun Room's solid roof means light levels inside are lower than a fully glazed lean-to greenhouse. If growing crops is your primary goal, a glass-roofed Elite Kensington or Vitavia will give you significantly better light transmission (90% vs approximately 70% for the Sun Room). The Sun Room excels as a multi-purpose space, somewhere you can sit, store plants, and grow shade-tolerant crops like salad leaves and herbs.

6ft lean-to range comparison

Our recommendation: For dedicated growing, the Elite Kensington is the strongest option at 6ft width. The box-section aluminium frames are noticeably more rigid than the Vitavia, the 25-year warranty is industry-leading, and the size range goes all the way to 6x20 for customers who need serious length. If you're on a tighter budget and only need a 6x8 or 6x10, the Vitavia IDA 5200 from £684 is a capable greenhouse that'll serve you well for 12+ years. The Palram Sun Room is a different product altogether, choose it if you want a covered outdoor living area that also happens to suit plant growing, not the other way round.

What can you grow in a 6ft lean-to greenhouse?

At 6ft wide, you have room for serious growing. A 6x8 model comfortably holds 8-12 cordon tomato plants in grow bags along both sides with a clear path in the middle. A 6x10 adds space for a dedicated propagation bench. At 6x12 and above, you can run mixed cropping, tomatoes and cucumbers on one side, staging with herbs and salad leaves on the other, and still have floor space for overwintering potted plants.

The wall heat advantage is strongest with heat-loving crops: tomatoes, chillies, peppers, aubergines, and cucumbers all produce measurably higher yields in a lean-to compared to a freestanding greenhouse of the same floor area. Expect to start sowing in mid-February and keep harvesting through late November, a growing season of 38-40 weeks compared to roughly 30 weeks in an open garden.

For winter use, a 6ft lean-to with polycarbonate glazing and bubble-wrap insulation on the remaining glass panels can maintain frost-free conditions (above 2°C) through most UK winters using a single 80W tubular heater. Running costs are typically £20–£35 per winter season, roughly 35% less than heating a freestanding greenhouse of the same size.

Delivery, assembly and installation

Every 6ft lean-to ships with free UK mainland delivery. Palram Canopia Sun Room models dispatch within 7-10 working days. Vitavia models deliver within 1-6 weeks. Elite Kensington lean-tos are made to order and deliver within 5 weeks.

Assembly time varies with model length. A 6x6 takes two people around 4-5 hours. A 6x8 to 6x10 is a solid day's work for two. Anything 6x12 and above should be treated as a full weekend project. You'll need a drill, spirit level, step ladder, and a basic spanner set. A second pair of hands is recommended for all 6ft models, the roof bars and glazing panels are too long for comfortable solo handling.

Our nationwide installation service covers all lean-to greenhouses. Professional installation for a 6ft lean-to typically starts from £250–£350 depending on the model and your location. Call 0800 098 8877 for a quote.

Planning permission for 6ft lean-to greenhouses

Most 6ft lean-to greenhouses don't need planning permission under UK permitted development rights. The key limits are: structures within 2m of a boundary must be under 2.5m at the highest point, and total garden buildings must not exceed 50% of your garden's curtilage. All 6ft lean-to models we sell meet the height requirement. If your property is listed, in a conservation area, or has had permitted development rights removed, check with your local planning authority before ordering. For longer models (6x16 and above), it's worth confirming the 50% curtilage calculation with your local council, particularly on smaller plots.

Related Categories

Looking for a different lean-to width or greenhouse type? Browse related ranges:

• All Lean-To Greenhouses, every width from 1ft to 8ft, starting from £219.
• 4ft Wide Lean-To Greenhouses, narrower walk-in models if 6ft is too deep for your space, from £110.
• 8x6 Freestanding Greenhouses, if you have garden space away from the wall, compare similar floor areas.
• Greenhouse Accessories, staging, auto-vents, heaters, shelving, and watering systems for lean-tos.
• Greenhouse Staging & Shelving, double-tier benches designed for 6ft lean-to layouts.

6ft wide lean-to greenhouse faqs

What is the best 6ft lean-to greenhouse?

The Elite Kensington is the best 6ft lean-to greenhouse for dedicated growing. It's UK-made in Barnsley with heavy-gauge box-section aluminium, a tall ridge height, wide door, 26 colour options, and a 25-year frame warranty. The 6x8 in horticultural glass at £799 is the most popular size. For a lower budget, the Vitavia IDA 5200 6x8 starts at £684 with a 12-year warranty. If you want a multi-purpose covered space rather than a pure greenhouse, the Palram Canopia Sun Room (from £1,175) is the better choice.

Is a 6ft lean-to greenhouse big enough for tomatoes?

Yes, a 6ft lean-to is ideal for tomatoes. A 6x8 model fits 8-12 cordon tomato plants in grow bags along both sides with a comfortable walkway in the centre. The wall heat gives tomatoes a measurable advantage over freestanding greenhouses, warmer night temperatures mean faster ripening and higher yields. You can start plants from seed in mid-February and harvest from June through to late October, giving you a 20+ week tomato season in most of the UK.

What is the difference between the Elite Kensington and the Palram Sun Room?

They're fundamentally different products. The Elite Kensington is a traditional lean-to greenhouse with a fully glazed roof and walls, built for maximum light and crop growing. The Palram Sun Room has clear polycarbonate walls but a solid roof, which reduces overhead light to roughly 70%. The Sun Room works better as a covered outdoor living area that also suits shade-tolerant plants like herbs and salad leaves. For serious vegetable and fruit growing, the Kensington is the right choice. For a multi-purpose patio enclosure, choose the Sun Room.

Do I need a concrete base for a 6ft lean-to greenhouse?

Yes, we strongly recommend a poured concrete base for all 6ft lean-to greenhouses. At this width, the structural loads are too heavy for paving slabs, they can settle unevenly over time and cause glazing alignment problems. A concrete pad should be 100mm thick on 75mm of compacted hardcore, extending 50mm beyond the greenhouse footprint on all open sides. Check diagonal measurements corner-to-corner during base preparation, they must match within 5mm. Our base preparation guide includes exact dimensions for each model size.

How much does a 6ft lean-to greenhouse cost to heat in winter?

Roughly £20–£35 per winter season to keep a 6ft lean-to frost-free. The house wall provides 3-4°C of free background heat, and a single 80W tubular heater (around £25–£40 to buy) handles the rest on cold nights. Adding bubble-wrap insulation to the glazing cuts heat loss by a further 30%. Total heating costs run about 35% lower than a freestanding greenhouse with the same floor area, because you're only heating three exposed sides instead of four. Polycarbonate glazing reduces costs further with its 40% better insulation compared to single glass.

Can I assemble a 6ft lean-to greenhouse myself?

Yes, but you'll need a second person. The roof bars and glazing panels on a 6ft lean-to are too long and heavy for one person to handle safely. A 6x6 takes two people roughly 4-5 hours. A 6x10 is a full day's work. Models 6x12 and above are best treated as a weekend project. You'll need a drill (for masonry wall fixings), a spirit level, a step ladder, and a spanner set. If you'd rather not self-assemble, our professional installation service starts from £250 for 6ft lean-to models.

Fixing a 6ft lean-to to your wall

A 6ft lean-to needs a long run of clear, plumb wall. Downpipes and gas boxes catch people out. Both guides below deal with the wall itself.

• How to fix a lean-to greenhouse on an uneven wall - the timber goalpost method we use on site, step by step.
• Lean-to and house-attached greenhouse planning in the UK - permitted development limits, boundaries and listed buildings.