12 x 6 (3.56m x 1.86m) Mercia Greenhouse and Shed Combi

Detailed Specification

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

Product Name: 12 x 6 (3.56m x 1.86m) Mercia Greenhouse and Shed Combi
Footprint (Depth x Width): 3.56m x 1.86m (11'8" x 6'1")
Height to Ridge: 2.03m (6'8")
Height to Eaves: 1.60m (5'3")
Walls: 12mm tongue and groove
Framing: 28mm x 28mm (1" x 1")
Door: Single Door
Door Opening (Height x Width): 1.72m x 0.55m (5'8" x 1'10")
Door Lock: Sliding padbolt on shed door; turn button on greenhouse door
Roof Type: Apex
Roof: Styrene glazed greenhouse roof; 9mm OSB shed roof
Roofing Felt: Supplied
Floor: 11mm OSB
Floor Joists: -
Floor Joists Direction: Left to Right
Window(s): 2 windows on shed; fully glazed greenhouse in 3/4 lengths
Window / Wall Panels: N/A
Window Glazing Material: Styrene
Windowless Option Available: N/A
Treatment: Dip Treated
Portabases Available: No
Manufacturer's Guarantee: 10 Year anti-rot guarantee
FSC Certified: Yes
Free Delivery: Yes*
Assembly Available: Yes
EAN Number: 5029442091211
Recommended Treatment: Protek Range (please click here)
Manufacturer: Mercia


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.

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



Booking Delivery

You have the option to book your delivery date at the time of placing your order. 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 post code 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.

If you choose not to select a requested delivery date you will be contacted directly to arrange a convenient delivery date.

You'll be contacted on the morning of your delivery date either by text or email with a 2 hour delivery slot. You will also be contacted by the driver 30 minutes before the delivery location.

Please note: for Mercia Metal and Mercia Plastic 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.

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.

Upon Delivery

Your order is delivered either kerbside or driveway and will be delivered on a 17 ton lorry (the size of a Refuse Cart). 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 un-safe location. Unfortunately we will not be able to go through your property.

You do not need to be home for your delivery. All we ask is that you let us know via email or leave a signed note to let us know that you will not be present for the delivery. In the note please let us know where a suitable place would be to leave the building. If you leave us a note the delivery driver will ring you 30 minutes before delivery and you can inform them of where the note is or you could just leave it on your front door. You must include your signature on the note; our drivers can then take photos of the note to confirm an item(s) has been delivered.

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

If you have chosen our installation option your order will be delivered as per the delivery process above you have chosen. You’ll be given a separate date for the installation. The installation option will extend your lead time by up to 10 working days.

12 x 6 (3.56m x 1.86m) Mercia Greenhouse and Shed Combi

Product code - 20011002

Our Price £822.00

in stock3-7 Working Days.

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 greenhouse to suit overall look
  • Opening roof window for ventilation and temperature regulation

Free Delivery exceptions may apply

Usually delivered within: 3-7 Working Days.

Note: Currently not available for delivery to Offshore Post Codes.

Request a delivery date

Additional options:
Protek Wood Stain and Protector for Mercia Products
Protek Wood Stain and Protector 5 litres - Gun Metal Grey£20.00
Protek Wood Stain and Protector 5 litres - Chestnut£20.00
Protek Wood Stain and Protector 5 litres - Silver Fir£20.00
Protek Wood Stain and Protector 5 litres - Soft Sage£20.00
Protek Wood Stain and Protector 5 litres - Teak£20.00
Protek Wood Stain and Protector 5 litres - Sky Grey Blue£20.00
Protek Royal Exterior Superior Wood Finish for Mercia Products
Protek Royal Exterior Superior Wood Finish 5 litres - Golden Oak£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Sage Leaf£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Silver Grey£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Clear£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Eggshell Blue£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Slate Grey£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Mendip Mist£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Anthracite Grey£46.00

Your choices:

  • 12 x 6 (3.56m x 1.86m) Mercia Greenhouse and Shed Combi£822.00