12 x 6 (3.56m x 1.97m) Mercia Greenhouse and Shed Combi

click to enlarge
12 x 6  Mercia Greenhouse and Shed Combi - angle view
  • 12 x 6  Mercia Greenhouse and Shed Combi - angle view
  • 12 x 6 Mercia Greenhouse and Shed Combi - Isolated angle view
  • 12 x 6  Mercia Greenhouse and Shed Combi - Isolated front view
  • 12 x 6  Mercia Greenhouse and Shed Combi - Isolated side view
  • 12 x 6  Mercia Greenhouse and Shed Combi - internal view door open
  • 12 x 6  Mercia Greenhouse and Shed Combi - Internal view
  • 12 x 6  Mercia Greenhouse and Shed Combi - shiplap cladding
  • 12 x 6  Mercia Greenhouse and Shed Combi - windows
  • 12 x 6 Mercia Greenhouse and Shed Combi - dimensions
  • 12 x 6 Mercia Greenhouse and Shed Combi - footprint


For anyone who wants to get serious about greenhouse gardening projects while having the convenience of a nearby storage shed, the 12 x 6 Mercia Greenhouse and Shed Combi is an ideal garden building and comes at a very reasonable price when considering its range of uses. Unlike the smaller sized combi buildings, the greenhouse portion of the building truly dominates the overall appearance here, and provides a spectacular amount of natural light for any plants growing inside. Any keen gardener will appreciate the ample space, perfect for long shelves of potted plants.

Despite this increased length, the building remains six feet wide and is therefore suitable for many town gardens. With a storage shed directly attached to the back of the greenhouse, storing your garden tools has never been more convenient and practical. The high quality 12mm timber cladding used for this storage shed, which extends around the lower sections of the entire building, greatly improves the strength of the overall structure and has more engineered, low profile look than the common shed.


What makes this combi building unique when compared with many others is the 12mm tongue and groove cladding whose timber interlocks, diverting rainfall away from the building while offering great structural stability. This timber is dip treated before it is delivered, making sure it is protected during transit and the initial process of assembly.

Once complete, it is essential to apply further treatment to the wood. A great option when doing so is with the Protek range, a leading brand that offers a huge variety of coloured finishes when it comes to treating your timber. Following the basic care guide provided by the manufacturer will ensure the validity of your 10 year anti-rot guarantee.

The many windows in this combi building feature robust and shatterproof styrene panes, reducing the risk of injury that comes with working in a bustling garden. One of these windows – placed out of the way on the roof – can be opened if air circulation is needed. 1” x 1” wooden framing provides additional strength. A finial and some decorative hinges on the single door provide a charming appearance to the front of the building, while a galvanised steel pad bolt offers additional security for the storage shed for those who would like to attach their own padlock.

This building is supplied flat packed with detailed instructions and all the fixtures needed to complete assembly by yourself. We recommend that you build your Combi Greenhouse and Storage Shed with one or two trusted friends, or simply add the option when ordering to have your building professionally assembled by our team.

Additional Details About Your Order

If you think that a 12 x 6 Mercia Greenhouse and Shed Combi would be perfect for you, take a look at our delivery information. If you would like any extra details, please feel free to email us to discuss your order and our full range of product options, or better still, give us a call so we can find the perfect product to suit your needs.

Alternatively, why not visit us at our Brookfields Garden Centre show site near Nottingham? One of our helpful advisors will be on hand to show you around or to help guide you through your order in person. Please be aware if there is a particular garden building you would like to see, we recommend contacting us in advance to find out if we have it, or one similar, on site.

Please Note:  Images may show the product dressed or painted for display purposes. The product is supplied unpainted and props featured are not included.


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.


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.


Please note: all imperial measurements are approximate, and the Mercia Greenhouses are made from metric measurements. We would recommend that the base is at least 50mm bigger in each direction.

Product Name:
12 x 6 (3.62m x 1.97m) Mercia Greenhouse and Shed Combi
Footprint Depth:
3.62m (11'10")
Footprint Width:
1.97m (6'6")
Ridge Height:
2.06m (6'9")
Eaves Height:
1.60m (5'3")
Cladding Thickness:
12mm Tongue and Groove
28mm x 28mm (11 /10" x 11 /10")
Treatment Type:
Dip Treated
Recommended Treatment:
Protek Range (please click here)
Roof Type:
Roof Material:
styrene glazed greenhouse roof and Tongue and Groove shed roof
Roof Thickness:
12mm - shed
Roofing Felt:
Green Mineral Felt
Floor Material:
12mm Tongue and Groove floor to the shed element; the greenhouse element has no floor
Floor Joists:
28mm x 28mm (11 /10" x 11 /10")
Floor Joist Direction:
Left to Right
Door Type:
Single Door
Door Height:
1.71m (5'7")
Door Width:
0.55m (1'10")
Door Lock System:
Sliding padbolt on shed door; turn button on greenhouse door
Number of Window(s):
2 x shed windows
fully glazed greenhouse in 3/4 lengths
Window Material:
Window/Door Panel(s) Interchangeable:
Manufacturer's Guarantee:
10 Year Anti-Rot Guarantee
Self assembly
Optional Assembly:
FSC Certified:
× Made from sustainably sourced timber
Free Delivery*:
Optional Wooden Base:
Manufacturer's Product Code:
EAN Number:
Mercia Garden Products
Country of Origin:
United Kingdom


This expansive 12 x 6 Mercia Greenhouse and Shed Combi has everything an avid gardener could wish for, with ample interior space to grow plants in the greenhouse portion of the building and a storage shed for any garden tools or equipment. Key features include:

  • Spacious greenhouse with an attached storage shed
  • 10 year anti-rot guarantee comes as standard, for your peace of mind
  • Wooden framing for the greenhouse to suit the overall look
  • Opening roof window for ventilation and temperature regulation

What is included?

  • 10 year anti-rot guarantee*
  • High quality, ethically sourced timber
  • Space-saving design
  • Dip treated prior to delivery
  • Pad bolt on shed door
  • Cost effective garden storage and greenhouse solution
  • Tongue and groove cladding that has a pleasing finish and provides good protection from the elements
  • Roofing felt included as standard
  • All fixings included and detailed instructions
  • Assembly at home yourself or using our team of professionals

Customer Reviews

By Mr Richard Hazelwood on 10th April 2024
"its rubbish for the money "
Star Rating 1

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