Flash Sale on Selected Wooden Buildings! Ends in
Get 10% Off Wooden Buildings With Code SUMMER10

BillyOh Polycarbonate Lean-To Greenhouse

The lean-to greenhouse is a stylish and compact solution for all-year-round use. This building includes a sliding door for easy access to your building even when carrying items; a strong galvanised steel base is also included to create a sturdy foundation for your building, and increase its resistance to hazardous weather.


1. Customise

Optional Extras:
Total Price:


Finance from ... a month
Finance Calculation for your £1,439.00 order

Deposit Amount of 10% = ...

I would like to pay over 24 months

Total Cash Price £00.00
Total Amount of Credit £00.00
Deposit £00.00
Interest Rate 14.9% p.a.fixed
Total Amount Payable £000.00
Total Charge fo Credit £00.00
APR representative 14.9%
Monthly Repayment( ) £00.00


  • Space saving lean to design
  • Low maintenance, rust free aluminium framing
  • 44mm hollow twin polycarbonate panels are virtually unbreakable
  • Sliding single door
  • Water gutters for drainage
  • Roof vent for air circulation and good ventilation
  • Galvanised steel base
  • Finished in green to blend nicely into your garden
Overall Dimensions (Includes Roof Overhang)
  • (A) Width: 1.25m (4ft1)
  • (B) Depth: 2.52m (8ft3)
  • (C) Ridge: 2.21m (7ft3)
  • (D) Eaves: 1.35m (4ft5)

Why buy the BillyOh Lean-To Greenhouse?

Base<br/> Included

Galvanised steel base is included to give the greenhouse a strong foundation.

Panoramic<br/> Windows

Allows light to reach the interior throughout the day to get the most out of the sun.

Extra<br/> Head-height

Crouch free design, giving you the ultimate space.

Sliding<br/> Door

For ease of access and protection from slamming.

Key Features

Tough, Rust-Proof Aluminium Frame

Our Polycarbonate Lean-To Greenhouse takes pride in being an extremely weatherproof design, made with aluminium frames and brackets with a galvanised steel base. It is sure to last for years, keeping your plants healthy and well-protected for a long period of time.

Opening Roof Vent

The opening roof vent allows your plants to receive the optimum amount of airflow. Similarly, the design includes a water gutter that ensures an efficient drainage system inside your greenhouse.

Twin-wall Polycarbonate

The glazing diffuses sunlight and spreads it around the interior, protecting your plants from excessive heat.

Key features
Shatterproof Glazing

As the greenhouse is made from polycarbonate materials, you can be sure that its panels are unlikely to break too.

Convenient Slide Door

Its sliding door prevents it from slamming closed amid strong winds as well, limiting potential damage to both the greenhouse, and its important features.

Low Maintenance

Our BillyOh Polycarbonate Lean-To greenhouse requires very little maintenance, thanks to its hard-wearing materials that are UV-protected.

Frequently Asked Questions


  • All around polycarbonate glazing

  • Rust free metal framing

  • Built in guttering

  • Galvanised steel base

  • All fixtures and fittings

  • Comprehensive assembly instructions

Yes! This greenhouse includes a strong, galvanised steel base. This allows it to be light and easily transported while giving your greenhouse protection from bugs and excess moisture. It is easily cleaned and gives the structure the strong, perfect foundation it needs to resist rust and keep your building sturdy for years to come.

Yes, a great feature of the Lean-To Greenhouse is the Adjustable Roof Vent installed on the roof. The opening roof vent allows you to better control the ventilation and air circulation inside your greenhouse, helping you to effectively grow your plants. The vent also allows you to regulate the temperature, so you can prevent overheating and help you grow healthy vegetables and flowers.

The roof and windows of the greenhouse are built with twin wall polycarbonate sheeting, a durable and strong plastic, with two layers for added durability and insulation. Polycarbonate panes are far stronger than traditional glass, so you will not need to worry about them easily shattering and requiring replacement. The polycarbonate sheets allow natural lighting into the inside and retain enough heat for your plants to grow, so you can achieve the best growing results from your own garden!

Integrated Guttering - To effectively move water away from the entrance of the building.

Sliding Door - This will help to prevent the door from slamming in harsh weather.

Roof Vent - This helps to regulate temperature and air flow to your plants.

Rust Free Framing - Aluminium framing gives peace of mind when it comes to rust.

If the building is shorter than 2.5m tall you should not require planning permission, (unless it’s more than 50% of your garden or to be put in your front garden). Planning permission rules can vary by area so we would strongly recommend checking your local council rules before ordering from us.

This means that the structure is designed to rest against the side of another structure to save space and give it support. This takes advantage of an existing structure to save you time and money over a standalone building. Plus, it potentially offers several benefits including insulation for your home and a more stable temperature for growing.

We do not offer an installation service on any of our buildings, our buildings are designed & made to be easy and simple to assemble. Using the assembly instruction included and with a team of just 2 people and a bit of DIY knowledge you can expect to have your BillyOh building up within a day, or as little as 3-4 hours with some of our smaller buildings.

You can place this building against any strong wall or fence. It is designed to easily be supported by any wall of your home or if tall and sturdy enough your property fencing. You should face the structure toward the south to give it the most sunlight all year round. This will extend the growing season and give you the best results.

No, our lean-to greenhouse has one front-facing wall and two side walls. The rear wall comes from your home or another structure. This has many benefits. First, it saves you money over a standalone structure, and second, the walls of our homes generally store extra heat during the day and release it throughout the night. By placing the structure adjacent to this, it can achieve a far more stable temperature than a stand-alone model and even help insulate your home.

Your order can be tracked through the account section on our website or by contacting us directly. You will be contacted after your order by our helpful care team to arrange delivery of your building.

We offer a pay by finance option on any purchase over the value of £560.

Our simple finance options allow you to spread the cost of your purchase over 24, 36 or 48 months.Read more about our Pay by Finance option here.

More About the Lean-To Polycarbonate Greenhouse


BillyOh Polycarbonate Lean-To Greenhouse

The BillyOh Polycarbonate Lean-To Greenhouse is small and effective, with a traditional greenhouse aesthetic that catches the eye while ensuring your plants are warm! As with all our greenhouse range,  this small, lean-to greenhouse is designed to do the job sustainably all while fitting with a modern garden aesthetic. The Rosette provides the ideal conditions and protection from the elements for your plants all while being extremely space-efficient - a super-compact product at an amazing price!

Lean-to Metal Greenhouse Features

The BillyOh Lean-to comes with a number of great accessories designed to make it look great and stay strong throughout its life. These features make it even more efficient at making your fruits, vegetables and flowers comfy! With the insulation and weather protection provided by this product, you can grow just about anything you like - whether that's tropical plants or just colourful summer flowers!

Keep reading to explore all the details of the BillyOh Lean-to's fantastic features.

Aluminium framing

The BillyOh Lean-to Greenhouse is constructed from an aluminium frame, with a coat of traditional green paint to give it that classic greenhouse look. This gives you a superb look without the use of paint, as is used on wooden greenhouses. The aluminium metal framing is structurally strong and weather-resistant, keeping your plants safe all year round - whatever the weather.

The BillyOh Lean-to is also designed with extra head height despite it's compact size, making it a crouch-free design. With this extra space, you won't have to bend over when coming in or out of your lean-to greenhouse.

Galvanised steel base

As with all our great range of metal greenhouses, the BillyOh Lean-to is equipped with a super-strong galvanised steel base. This base is resistant to rust and water, meaning it will stay stronger for longer - giving you real value for money!

Polycarbonate glazing

Instead of traditional horticultural glass panels, which are easily susceptible to damage, our metal greenhouses use double-layered polycarbonate glazing.  Polycarbonate sheets are shatterproof and are glazed to spread the natural light around effectively while protecting plants from excessive heat. The panoramic roof windows ensure you get enough sunlight all year round.

Polycarbonate panel sheets are both cheaper and safer than the classic glass material, giving you a better overall garden greenhouse. 

In-built roof vent

You can easily ventilate your greenhouse plants using the BillyOh Lean-to's in-built adjustable roof vent. The easy-to-use vent simply needs to be propped open to provide easy air flow and air circulation throughout the lean-to greenhouse.

Sliding doors and metal guttering

The BillyOh Lean-to's sliding polycarbonate door is a fantastic space-saver, giving you easy walk-in, walk-out access to your plants and potting benches. You don't have to leave room for the door to swing open and close, giving you more outdoor space to do what you want with - ideal for a space-saver such as the BillyOh Lean-to.

This product is also equipped with metal guttering, giving you effective water drainage from the moment it arrives! The roof overhang of the guttering is designed to be small and easy to reach, so you won't go through any pain trying to clean the gutter when the time comes!

Small Sizing

This lean-to greenhouse has been designed to fit effectively anywhere! Using a lean-to design, the greenhouse is designed to be placed directly against a solid wall. This will give it sufficient structural support and close it off from the elements.

The BillyOh Lean-to comes in at a nicely-sized 4x6 feet, giving you enough space inside for your plants. But it still stands at just over a comfortable 7ft tall, giving you lots of headroom indoors even though it's a lean-to. All this while still being short enough to avoid any planning permission regulations!

We also have a series of self-standing metal greenhouses: the Rosette Hobby and its bigger cousin the Harvester!

Quick Installation

All our products are designed for quick and easy installation once they arrive at your house. If you have any issues, feel free to contact our super customer support team. Either visit our website homepage and contact us there or give us a call at 01909 768840. You can also visit our blog and find all kinds of support and guides there, such as how to organise a greenhouse or the 5 best plants to grow in a greenhouse!

Garden Buildings Direct Free Delivery

This BillyOh Building, as with all others, is available to be delivered free and swiftly to most of the mainland UK. During the order process, you will be prompted to put in your delivery address. After we let you know if it's a valid postcode for free delivery, it'll be on your way and there before you know it! This product is also available to be purchased on finance.

Dimensions 4 x 8 Green 4 x 8 Grey
Width 125cm 125cm
Depth 252cm 252cm
Width (Internal) 122cm 122cm
Depth (Internal) 184cm 244cm
Eaves Height (Inc Floor) 135cm 135cm
Ridge Height (Inc Floor) 221cm 221cm
Eaves Height (Excl Floor) 127cm 127cm
Ridge Height (Excl Floor) 213cm 213cm
Door Opening Size (w x h) 55cm x 159cm 55cm x 159cm
Door Width 60cm 60cm
Door Height 161cm 161cm
Materials 4 x 8 Green 4 x 8 Grey
Frame material Aluminum Aluminum
Cover Material Hollow Polycarbonate Hollow Polycarbonate
Base Material Galvanized Steel Base Galvanized Steel Base
Glazing Material Polycarbonate glazing Polycarbonate glazing
Features 4 x 8 Green 4 x 8 Grey
Number of Opening Vents? 1 1
Colour Green Grey
Greenhouse Style Lean-to Greenhouse Lean-to Greenhouse
Material Polycarbonate Polycarbonate
Please Note: All products supplied self assembly flat packed unless otherwise stated.

Videos & Guides

Our resource library offers step by step instructions, explanation videos and customer content to help you to plan, buy and build your garden building.


We do not offer an installation service on any of our buildings, as they are designed to be easy and simple to assemble. Using the digital assembly instructions included in your order confirmation and a team of at least 2 people, the handy pre-assembled panels mean you will have your BillyOh building up in no time!

See just how easy our buildings are to assemble in this video: