Elite Kensington 4ft Wide Lean To Greenhouse

About Our Elite Kensington 4ft Wide Lean-To Greenhouses

Elite Kensington 4ft Wide Lean-To Greenhouses transform narrow spaces into productive growing areas. Standing 7ft 3" (2235mm) tall at the ridge with a 4ft 3" width, these compact aluminium structures fit perfectly against walls, fences, or building sides where traditional freestanding models won't work. The generous 5ft 10" (1800mm) eaves height at the front ensures plenty of headroom, even in such a slim structure. Available in lengths from 4ft to 10ft, you'll find options for balconies, small patios, or long side passages.

The collection features 10 powder-coated colour options (including black, green, and silver), 3mm horticultural or toughened glazing, and built-in guttering to protect your property from water damage. Every model includes at least one roof vent and one louvre vent for proper airflow. You can choose between a standard flat sill for mounting onto a pre-built brick wall, or the official 5-inch high Elite base plinth for easy installation onto flat surfaces like paving or concrete.

Prices start from £609 for the 4x4 model with standard horticultural glass. Premium toughened glass versions reach over £2,000 for larger configurations. All Elite Kensington 4ft models come with a 20 Year Warranty, free UK mainland delivery, and optional professional installation through our Greenhouse Installation Service.

Choosing Your Elite Kensington 4ft Wide Lean-To Greenhouse

Size Selection

The 4x4 model suits herb gardens or seasonal plant propagation. The 4x6 provides staging on one side with comfortable walking space. The 4x8 accommodates two-tier shelving plus floor space for tomato grow bags. Larger 4x10 to 4x10 versions work brilliantly as extensive potting areas or winter storage for tender perennials. Every additional 2ft of length adds roughly 8 square feet of growing space.

Glazing Options

Standard 3mm horticultural glass offers clarity and heat retention at the entry price point. Toughened glass (4mm safety-rated) is highly recommended for lean-tos near patios, doorways, or child play areas — it shatters into small, blunt pieces rather than dangerous shards. Twin-wall polycarbonate provides superior insulation (up to 60% better heat retention than glass) but costs approximately 15–10% more than standard glazing.

The Base Challenge

You must decide how to mount your Kensington. The Flat Sill option is designed for sitting on top of a dwarf wall or a perfectly level custom brick plinth. The easiest solution for most gardeners is the 5-inch high Elite Base Plinth (£75–150 depending on size). This aluminium plinth clicks directly onto the greenhouse frame, providing the necessary 5 inches of height and a solid foundation to bolt down to concrete or paving slabs, without needing complex brickwork. Our How to Build a Greenhouse Base guide covers both methods.

Browse our full Lean-To Greenhouses collection or compare with the wider Elite Kensington 6ft Wide Lean to Greenhouse range. The Elite Windsor Lean-To Greenhouse offers Victorian styling at similar widths.

Key Features of Elite Kensington 4ft Lean-To Greenhouses

• Compact 4ft 3" width – fits narrow side passages and small patios
• 7ft 3" (2235mm) ridge height – maximises vertical growing space against your wall
• 5ft 10" (1800mm) eaves height – excellent front headroom for a lean-to
• 10 powder-coated colours – match your property's exterior
• Choice of Flat Sill or 5" Base Plinth – flexible mounting options
• 3mm horticultural or toughened glass – choice of safety ratings
• Integrated aluminium guttering – protects walls from water damage
• Low-threshold entrance – easy access (when using flat sill or properly ramped base)
• Minimum 1 roof vent + 1 louvre vent – prevents summer overheating
• 20 Year Elite Warranty – manufactured in their UK facility

Frequently Asked Questions About Elite Kensington 4ft Wide Lean-To Greenhouses

• What's the difference between the 4ft and 6ft wide Kensington?

  The 4ft model measures 4ft 3" wide externally — perfect for narrow side passages, small patios, or balconies where space is limited. The 6ft wide version provides 50% more floor area, allowing comfortable staging on both sides with a central walkway. If your space exceeds 5ft width, the 6ft Kensington usually offers better value per square foot of growing area.

• Can I install a 4ft lean-to over an existing doorway?

  Yes, but you'll need to ensure the door opens inwards, or is low enough to clear the 7ft 3" ridge or 5ft 10" eaves depending on orientation. You must use toughened glass for safety compliance if covering a doorway. The greenhouse frame must be fixed securely to the wall above the doorway, typically requiring masonry anchors into solid brickwork. Avoid installing over uPVC door frames without specialist advice.

• Do I really need the 5-inch Elite Base Plinth?

  If you are installing directly onto a flat surface like a patio or concrete pad, yes, we highly recommend it. The 5-inch plinth gives you instant height, a solid anchoring point, and prevents the door from snagging on uneven ground. If you are an experienced DIYer building a precise single-skin brick wall to exact dimensions, you can choose the Flat Sill option instead to sit purely on top of your brickwork.

• How much staging fits inside a 4x6 Kensington?

  A 4x6 model accommodates one 4ft x 18" staging bench along one wall, leaving roughly 30" walking space down the centre. You cannot fit standard staging on both sides in a 4ft width — it becomes too cramped for comfortable access. For two-sided staging, consider 6ft Wide Lean-To Greenhouses instead.

• Will this greenhouse work against an uneven or rendered wall?

  Elite Kensington frames fix to walls using expansion bolts or coach screws, requiring solid substrate behind render or cladding. Lightweight render may crack under fixing pressure — check for solid brick or blockwork underneath. For severely uneven walls (>10mm variation), you'll need wooden shims behind the fixing points to keep the frame level. The integral guttering creates a small gap between greenhouse and wall, accommodating minor surface irregularities.

• What's included in the professional installation service?

  Our professional installation teams handle base levelling, frame assembly, glazing, and secure wall fixings. Installation typically takes one full day. The service covers mainland UK addresses (excluding Scottish Highlands and offshore islands). Current rates start from £650 for smaller 4x6 models, rising to £930 for the largest 4x10 models.