Description

Create a bright, sheltered growing space with the 8 x 4 Mercia Woodsman Lean-To Glass Greenhouse. Combining classic wooden construction with toughened glass glazing, this greenhouse is designed to fit neatly against a wall or fence, ideal for smaller gardens or making the most of an unused corner.

Handcrafted in the UK from sustainably sourced timber, it is built with 12mm shiplap cladding and a robust 2x2” frame for long-lasting stability. The toughened glass panels offer outstanding light transmission to encourage healthy plant growth while providing greater strength and safety than standard horticultural glass. If damaged, the glass shatters into small, blunt fragments, reducing risk in busy gardens.

Designed with flexibility in mind, the door panel can be positioned to suit your garden layout, ensuring easy access. Traditional ironmongery adds a touch of heritage charm, making this greenhouse a practical and attractive addition to your outdoor space. Supplied with all fittings and easy-to-follow instructions, assembly is simple, even for first-time greenhouse owners.

The lean-to design allows the structure to benefit from the warmth and shelter of an adjacent wall, helping to create a stable environment for plants throughout the year. The pent roof sheds rainwater efficiently and provides generous headroom inside. An adjustable roof vent allows you to control airflow and prevent overheating during warmer months.

Backed by a 10-year anti-rot guarantee, this greenhouse is built to last. It provides a dedicated space for growing vegetables, herbs, or flowers season after season. With fast UK delivery, your new growing space could be ready sooner than you think.

Premium Greenhouse Base

Designed for superior stability, the enhanced greenhouse base offers a 20% wider foundation than standard options, providing a solid, long-lasting support system. This cost-effective upgrade ensures your greenhouse remains sturdy and secure for years to come.

Greenhouse Height Extension

Expand your greenhouse with our Height Extension Pack, designed to increase headroom for greater comfort and ease of movement. The extra height improves air circulation, encouraging healthier plant growth while offering more space for taller plants, hanging baskets, and shelving. This upgrade not only enhances functionality but also creates a more open and spacious environment, making your greenhouse an even more enjoyable place to work.

Also available with different glazing finishes:
8 x 4 Mercia Woodsman Lean to Wooden Greenhouse - Styrene
8 x 4 Mercia Woodsman Lean to Wooden Greenhouse - Polycarbonate

Pre-Painted Options

Save hours of effort with the ready-painted service, allowing you to spend more time enjoying your new greenhouse. Professionally coated in your chosen colour, your building will arrive fully painted and ready to use. For added peace of mind, a 1-litre pot of paint is included for future touch-ups, along with our three-year paint guarantee, ensuring long-lasting protection against the elements.

Colour options:
Castle Green
Clove
Dove
Driftwood
Lakeside
Olive Tree

Features:

Guarantee - 10-year anti-rot

Walls – 12mm shiplap cladding and polycarbonate glazing

Roof – toughened glass glazing

Frame – 2” x 2”

Windows -  fixed + 1 opening skylight

Doors – the single door can be positioned in any location

Handle – antique style ironmongery and mortice lock (keys supplied)

Treatment - dip treated (application of preservative and waterproof coat required)

Make The Most of Your Wooden Greenhouse

The compact 8 x 4 layout makes this greenhouse perfect for making every inch of growing space count. Position sun-loving plants like tomatoes or peppers along the back wall to soak up warmth, keeping smaller pots and herbs near the front for easy access. Installing shelves or wall-mounted racks (available separately) can help you maximise vertical space, allowing you to grow more in a compact area.

The toughened glass ensures your plants receive plenty of natural light, but good ventilation is essential. Use the roof vent and door to manage airflow and prevent overheating, particularly in summer. Plan your growing year by rotating crops—start seedlings early in spring, cultivate salad leaves and herbs through summer, and grow hardy greens into autumn. With its robust timber frame, high-clarity toughened glass, and space-saving lean-to design, this greenhouse provides a long-term solution for growing in smaller outdoor spaces.

About Your Order

The Mercia Wooden Greenhouse is a British-made garden building made from sustainably sourced timber. You will get a low-carbon footprint wooden greenhouse made from ethically sourced materials. The practical design makes it straightforward to assemble. It comes with a 10-year anti-rot guarantee and a 12-month manufacturer's warranty.

Superior fixings, and optional assembly from the manufacturer is available. The Greenhouse is flat-packed for easy handling and assembly.

Please note: Images may depict furnishings and accessories; optional potting shelf, these are for illustration purposes only and are not included with your order.

Wooden Greenhouse Maintenance

The greenhouse has timbers with dip-treated base coats to protect them during transit. You must apply a preservative and waterproofing topcoat immediately after installation. Using the treatment after installation, followed by consistent annual treatment of the wooden greenhouse, will maintain the high-quality finish and is a requirement of the 10-year anti-rot guarantee. A 1-year manufacturer's warranty is included as standard.

To treat the greenhouse, elbec recommends Protek wood treatment. Browse our Protek Royal Exterior Wood Finish Paint range to find the best paint colour to add your personalised finish. In the options section, we’ve included popular colours and a Wood Preserver+ for use underneath your colour choice.

About Mercia

Mercia Garden Products are proud to be a British business with over 140 years of experience. They offer a variety of products ranging from traditional garden sheds, summerhouses, playhouses, and garden bars to greenhouses and fencing and garden storage solutions. All their products are manufactured in the UK using timber sourced from sustainable forests and the most advanced manufacturing techniques. Mercia focuses on innovating and improving its products while maintaining customer satisfaction, including ensuring safety for both customers and staff.

The wooden greenhouse’s quality and durability are guaranteed with a 10-year anti-rot guarantee, assuring peace of mind. Regular treatment with a wood preservative is required to maintain this protection, securing the beauty and structural integrity of the timber greenhouse for the years to come.

View other products in Green Houses »

Delivery

ALL DELIVERIES ARE DELIVERED TO KERBSIDE OR DRIVEWAY. All of our Mercia products are delivered flat packed other than fence panels (which are delivered fully constructed), direct to your home, and are supplied with a set of instructions to support assembly.

Booking Delivery

You will be required to book your delivery date at the time of placing your order (except for Metal Shed). Our 'Request a Delivery Date' service is available to the majority of areas and you'll find that the majority of the UK postcodes are FREE but some areas may incur a delivery surcharge and some postcodes are not covered at all. Select a 'requested delivery date' by entering your postcode in the 'Request a delivery date' section above. You will also be notified at this time if your area incurs a surcharge or delivery is not covered in your area.

Prior to Delivery

On the morning of your delivery date, you'll be sent an update by text with an estimated 2-hour delivery slot (this update can only be provided where a mobile number has been supplied on the billing address section at the time of checkout) together with a link to the manufacturer delivery portal where you'll be able to track your order.

Please note: Mercia Metal Sheds ONLY - your order is delivered by a courier you will not be notified prior to the delivery. If you are not in on the day of the delivery you will be carded and asked to contact the courier to arrange a new mutual delivery date. The estimated delivery lead time for Mercia's Metal sheds is identified on the product for the metal shed. Lead times are on working days (Monday - Friday) excludes Bank Holidays. These estimated lead times are provided by the manufacturer. Some remote areas will take a little longer.

Upon Delivery

Your order is delivered either kerbside or driveway and will be delivered on either a 3.5T, 7.5T or 18T Lorry. Unfortunately due to health and safety and insurance liabilities the driver will not be able to take your goods around to the back of your property but may upon request place the product at the side of the house if there are no access or restriction issues. We would not risk damaging your property whilst delivering a product to an unsafe location. Unfortunately, we will not be able to go through your property.

We would recommend against arranging for a third party to install the building before it's been delivered and checked that all parts are present, as we cannot be held liable for any third-party costs.

Pre-Painted Service - Greenhouse Only

If you choose the Painting Service, the estimated delivery lead time will be approximately 28 working days (Monday to Friday, excluding weekends and Bank Holidays). Please note that if you select the Pick a Day option, the chosen delivery date will not apply. Instead, the delivery team will contact you to arrange a new delivery date for your painted shed.

Pre-Painted Service - Greenhouse and Assembly

If you select the Painting Service and Assembly option, please review the section titled 'Orders with Assembly' below for details on the process and associated timelines.

Orders with Assembly 

The lead time for our installation option is around 7 weeks from the date of order. With the installation option, the majority of orders will have their delivery and installation on separate days; there will be a small number of orders which will have delivery and installation on the same day. You will be advised by the manufacturer's installation team which category your order falls into.

Depending on the installation option for your order, you will be contacted within the delivery timescale and given a date for either delivery/assembly on the same date or a separate date for delivery and assembly.

Specification

Quickview

The 8 x 4 Mercia Woodsman Pent Lean-To Glass Greenhouse features toughened glass, a space-saving lean-to design, and a 10-year anti-rot guarantee. Key features include:

• 1 Opening Roof Window
• Strong 12mm Shiplap Cladding
• Industry-leading 2" x 2" Framing
• Traditional Toughened Glass Glazing
• Fully Customisable - position doors to suit
• 10 Year Anti Rot Guarantee
• Professional Home Installation Available