Description

The Shire Holkham 12 x 6 Combi Greenhouse with Shed is a larger version of the popular design, offering more room for cultivation and storage. Crafted from quality timber, its classic build is enhanced with decorative cresting and a finial along the roofline, lending a refined character that makes this structure as attractive as it is practical.

The greenhouse section is bright and spacious, with generous glazing that welcomes natural light into the interior. Two roof vents are supplied, each supplied with a Bayliss automatic opener that reacts to rising temperatures by lifting the vents to improve airflow. This clever, heat-sensitive mechanism works without electricity, ensuring your plants are always in the right growing conditions.

The adjoining shed provides a secure and practical space for tools, compost, and accessories. Its timber cladding is designed for durability and strength, while the seamless design ensures the shed feels like a natural extension of the greenhouse. The result is a versatile garden building combining growing capacity and storage convenience.

Generous in scale and traditional in style, the Holkham Combi 12 x 6 is ideal for keen gardeners who want space to grow a wide variety of plants while keeping their gardening essentials organised and close at hand. It’s a structure that works hard while enhancing your garden's character.

Also available:

8 x 6 Shire Holkham Combi Greenhouse with Shed
16 x 6 Shire Holkham Combi Greenhouse with Shed

Features:

Features:

Guarantee – 10-year anti-rot

Walls Greenhouse – Toughened glass window panes with joinery panels

Walls Shed – 12mm tongue and groove

Base Greenhouse – Pressure-treated base frame timbers

Floor -Shed - 12mm tongue and groove

Roof Greenhouse – Toughened glass with joinery window panes

Roof Shed – 12mm tongue and groove

Frame Greenhouse – 34mm x 58mm

Frame Shed - 34mm x 34mm

Roof Vent – 2 opening skylight & 2 x Bayliss Auto Vent

Doors Greenhouse – Single

Door Shed – Single

Handle – Greenhouse: gate latch. Shed: padbolt (padlock not supplied)

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

Make the Most of Your Combi Greenhouse and Shed

The 12 x 6 size gives you ample flexibility — devote one section to nurturing seedlings and seasonal crops, while using the shed to house tools, fertiliser, or even a potting bench. Your gardening becomes more efficient and enjoyable with everything in a single structure.

The cresting and finial highlight its traditional appeal, while the dual automatic roof vent openers provide peace of mind that ventilation is always managed. Whether growing vegetables, cut flowers, or tender plants, this combi greenhouse with a shed perfectly balances practicality, charm, and performance.

About Your Order

The Shire Holkham Greenhouse Combi with Shed is made in the UK with sustainably sourced timber. You get a top-quality greenhouse with a low carbon footprint made from ethically sourced materials. The clean and straightforward design makes it easy to assemble, and all the fixtures and fittings required are included as part of your order. The greenhouse and shed has a 10-year anti-rot guarantee and a 12-month manufacturer's warranty to enjoy it for many seasons.

Please note: Images may show accessories and furnishings for display purposes only and are not included with your purchase. Some images show the greenhouse painted these are for illustration purposes only.

Greenhouse Combi Base

We recommend that the greenhouse and shed are sited on pre-laid, level, solid and dry ground. A foundation of hardcore, compacted, and concrete to give a stable and even footing for your garden building to sit on. You can request 'Guidelines for Preparing a Concrete Base' through our 'Contact Us' Section. This greenhouse and shed combi is supplied with comprehensive fitting instructions and fixings provided. Two people are required to complete the build.

Wooden Greenhouse Combi Aftercare

The greenhouse and shed have timbers with a dip-treated base coat 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 garden greenhouse combi, 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 combi, 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 also included popular colours and a Wood Preserver+ for use underneath your colour choice.

Optional Heater

Enhance plant growth in your greenhouse with the 2400-W combo heater and fan, equipped with a digital thermostat for year-round climate control. It maintains your set temperature, circulates air during warmer months, and is splash-resistant, making it ideal for greenhouse environments. 

Cost-effective and quiet, it also features an auto-reset safety function. CE approved for use in Europe and the UK. You can find this product in the "Choose Additional Extras" section above.

Please note that the heater is from a different manufacturer and will be delivered separately from the Holkham Greenhouse. The estimated delivery time for the heater is approximately 7-10 working days.

About Shire

Shire is one of the UK's leading manufacturers of garden buildings. Shire proudly manufactures the most extensive UK timber garden building range. Their range includes Garden Sheds, Log Cabins, Eco Homes, Home Offices, Sheds, Workshops, Summerhouses, Playhouses, Arbours, Storage units, and Pet houses. Their UK production facilities cover 23 acres, including stock holding facilities and an advanced high-speed timber planing mill. There is also a modern, well-equipped joinery production facility and semi-automated production lines. All Shire garden buildings are manufactured in the UK using the finest spruce timber, imported directly, and manufactured using the most up-to-date machines to ensure the best quality and best value-for-money garden sheds in the UK.

View other products in Shire Greenhouses »

Delivery

FREE delivery is available to most mainland UK postcodes. However, some areas may incur a surcharge and certain postcodes are excluded. Please use the ‘Delivery Cost Checker’ above to confirm availability and any applicable surcharges. This product is delivered via our supplier’s third-party carrier.

Delivery Leadtimes
The estimated delivery lead time for this product is identified on the product page above. Lead times are in working days (Monday - Friday) excludes Bank Holidays. These estimated lead times are provided by the manufacturers and are not guaranteed - due to fluctuation in demand - but are provided in good faith and are representative of delivery at that time. Some remote areas will take a little longer.

Delivery Date
You will be contacted towards the end of the delivery timescale with a confirmed delivery date. If you have any questions regarding your delivery, you can contact our supplier directly on 01945 465 295, Monday to Friday, 9:00am – 3:30pm.

Upon Delivery
Delivery will be made by Shire’s designated courier, typically using a 17-ton flat-bed vehicle (similar in size to a council refuse lorry). Deliveries usually take place between 7:00am and 7:00pm.

Please note that drivers are only insured to deliver to the kerbside or driveway. To avoid any risk of damage to your property, they are unable to pass through your home or access restricted areas. All deliveries are hand-unloaded by the driver.

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.

Installation option
With the installation option your building will be delivered and assembled on the same day.  If you are choosing the installation option after placing your order you’ll be contacted within 5 working days by Shire, the manufacturer either by a text message or automated telephone message (the latter if a mobile number is not supplied). This message will supply you with the name of the website to go on to where you will be required to accept the terms and conditions for assembly. Any delay in accepting these terms and conditions may affect your timescale. Once you have accepted these terms and conditions you will be contacted during the timescale with a date for the delivery/assembly of your order. The installation option will extend your lead time by up to 15-25 working days. This may take longer during seasonal periods. Please be aware that the installation team will require full access to your garden, 18" clearance all around the building and a firm and level base. Shire's installation team will not bring a building through your home as they are not covered by insurance to enter a customer’s home.

Specification

Quickview

The 12 x 6 Shire Holkham Combi Greenhouse with Shed combines expansive growing space with useful storage. A practical and elegant garden centrepiece. The key features include:

• Decorative roof cresting and finial
• Two opening and closing automatic roof vents
• Integrated shed adds valuable storage space
• Easy DIY assembly kit – includes installation hardware