Sheds

Three-Tier
Workshops

                            Current lead time:
                            mid October 2026

                            Prices from:

                            £6,969

                            View Full Price List
                            Current lead time:
                            mid November 2026
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                            30
                            Year
                            Guarantee

                            3-Tier
                            Workshops

                            Crafted for Purpose

                            Sometimes a regular shed just won't cut it – you need something bigger and better.

                            We call these buildings our 3-Tier Workshops. They’re substantial buildings suitable for year-round use that give you so much more than just storage.

                            Key features
                            19mm Tongue & Groove Scandinavian Redwood Cladding
                            70mm x 45mm Pressure-Treated C24-Graded Framing

                            Nova Mica
                            Steel box profile
                            roofing

                            Strong & Sturdy

                            Whatever activity or project you have in mind for your Workshop, it deserves sturdy accommodation that is guaranteed to repel Scotland’s harsh weather. This is why we created our robust 3-Tier specification – for buildings larger than 12m2, it ensures a dedicated space that’s securely protected against the elements.

                            The 3-Tier specification has an outer wall and an inner wall, separated by a breather cavity. This unique structure deals with all the moisture that is thrown at your Workshop on the outer wall, ensuring that its contents stay the way they should be – safe and dry.

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                            30
                            Year
                            Guarantee
                            Since 1989, our dedication to quality has ensured that our Garden Rooms, Garages, Workshops and Sheds have endured through all these years. With a little tender loving aftercare, combined with our 30-year guarantee, you can experience the peace of mind that comes with knowing your G&M building is built to last.
                            Read our guaranteeConditions apply
                            3-Tier Workshop Specifications
                            (for illustrative purposes only)
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                            Trusted by Sheddies for Over 35 Years
                            95+ Customer Reviews – Rated 4.9 out of 5
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                            Ian Samuel

                            After considering various shed suppliers in the area I am so pleased that I decided upon Gillies & Mackay. From my initial discussion with Kieran to installation I was very impressed. The advice given, even before I committed to buy, was streets ahead of that from other competitors and the willingness to conduct a site visit was hugely appreciated, particularly as I wanted the shed jnstalled in a relatively narrow space. Ross was very helpful at the site visit and he and his colleague installed my 12×5 shed on time and with minimal fuss. The end product is a sturdy, well built shed that I am sure will last for many years. The price was highly competitive in view of the build quality including a metal roof, guttering, shelving and thicker more durable wood as standard.

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                            Lionel Broche

                            Excellent quality sheds! Sturdy, long-life, and coming with lots of good advices to keep them in top condition.

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                            Angela Cushnie

                            Absolutely first class service from beginning to end. Nothing was too much trouble and the quality is fantastic too. If you are looking for a shed they are the place to go.

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                            John McEwen

                            We would like to share our great experience of now being a Sheddie. From the planning to completion of our new shed we can only compliment all involved with the build. The quality of the materials used and workmanship is clearly visible.
                            We would definately recommend G&M for anyone requiring a quality product and friendly service.

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                            Steven Souter

                            Excellent quality built sheds (I bought two a couple of years apart) one for gardening tools, push bike etc while the other a slightly larger one to use as a hobby workshop. I prepared the ground bases my self (all part of the fun of delivering the project, hard work though), and upon arrival the shed builders refined the finished level to ensure accurate setting. The sheds came with a coat of paint already on them but I gave them both a second coat as recommended by G&M to ensure warranty conditions were met and longevity. I an more than pleased with the build and quality of my sheds and I am pretty sure they are both going to out live me. The very presence of my sheds (hobby shed in particular) incite me to get out of the house and involve myself in my gardening and carpentry hobby. Could not be happier with my purchases and service I received from G&M. I am now toying with idea of creating a canopy between them so as to enable the space between them to also be used during inclement weather.

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                            Cat Mac
                            These are the best quality sheds money can buy.The staff are friendly and do such a professional job.The ultimate in timber buildings.
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                            Anne Robertson

                            I’m delighted with my potting shed from Gillies & Mackay Ltd. Each stage of the process ensured the successful outcome. I had a consultation at HQ in January to discuss what I was looking for and see the various sheds / options in person. Everyone was so friendly and welcoming. A site visit was organised to confirm that the old patio base was going to be suitable for my new potting shed and finally, the build itself went smoothly.
                            I was able to specify a bench height to suit me (at 5’3” short) so that I’m working at the perfect height. The same with my shelves on the back wall to accommodate the things I want to keep in the potting shed. These details made all the difference.
                            After care has been excellent too with emails linking to articles on the G&M website to get the best out of my #shedlife and the all important advice on how to take care of my shed in the next few weeks and for the years to come.
                            I love that the shed is totally constructed out of timber, it smells amazing when you open the door. I chose the Hudson Bay colour, looks fabulous too.

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                            Ralph Zucconi

                            Gillies & Mackay provide an excellent standard of customer service and high quality sheds delivered in line with expectations. I would recommend.

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                            David Potts

                            Very pleased with my new shed. I got a smallish one, but perfectly formed. Good quality and feels really solid. Good that G&M give a base coat on the exterior of the shed. Now fully painted and looking great.

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                            Richard Cole

                            Excellent staff always had the answer to any questions and the shed is very sturdy and solid I would recommend Gillies & Mackay.

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                            Joseph

                            It is over 10 years since I purchased a shed from G&M Ltd. Since then I have been involved in helping friends and relatives in their choice of sheds and shelters with mixed results. Everything has simply confirmed that I made the best choice in buying from G&M. It has moved house with me, been adapted internally and at every point the quality of workmanship has shone through. Although I live a fair distance from G&M, it is still the place I look to for quality and sheer workmanship.

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                            Julie Livingstone

                            Am over the moon with my new shed. From initial consultation through to after care blogs – nothing is left to chance. The passionate enthusiasm of the team is highly infectious and you can’t help but be swept along by it. The quality of the shed is second to none and you could easily live in it. Have used the company before and would not hesitate to use them again. Fantastic product with fantastic service and fantastic that they are local.

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                              3-tier Workshop Price List

                              The prices you see below are for standard 3-Tier Workshop sizes. These buildings include a fully-clad uPVC door and one uPVC horizontal opening window.

                              If you require a different size or customisations - these can be discussed and priced upon request.

                              All models feature the mighty Steel Box Profile roof as standard with a 20 year manufacturers guarantee.

                              Large spanning Workshops are more susceptible to water ingress and therefore require a cavity. The 3-Tier specification stops any moisture from getting into your Workshop.
                              Want to speak to our team?Let's discuss your project
                              Size (ft)
                              Price
                              10'
                              x
                              8'
                              3m
                              x
                              2.4m
                              £6,969
                              12'
                              x
                              8'
                              3.6m
                              x
                              2.4m
                              £7,445
                              10'
                              x
                              10'
                              3m
                              x
                              3m
                              £7,725
                              14'
                              x
                              8'
                              4.2m
                              x
                              2.4m
                              £8,525
                              12'
                              x
                              10'
                              3.6m
                              x
                              3m
                              £8,845
                              16'
                              x
                              8'
                              4.8m
                              x
                              2.4m
                              £9,590
                              14'
                              x
                              10'
                              4.2m
                              x
                              3m
                              £10,371
                              16'
                              x
                              10'
                              4.8m
                              x
                              3m
                              £11,649
                              18'
                              x
                              10'
                              5.4m
                              x
                              3m
                              £14,223
                              20'
                              x
                              10'
                              6m
                              x
                              3m
                              £15,825
                              Optional Upgrades
                              Workshop Door
                              Upgrades

                              Double-Glazed
                              Window Upgrades

                              Workshop
                              Guttering

                              More optional
                              workshop upgrades

                              Find Out What Your Workshop Really Costs – Start to Finish

                              Using this estimator will give you a true reflection of your full project cost – not just the workshop building itself. See how your design, size, and options come together in a transparent G&M estimate.
                              Frequently Asked Questions

                              Read our prep guide

                              Sheddies! You've probably got some questions about the prep work required to get ready for your new Gillies & Mackay Workshop.

                              We've got you covered – here's everything you need to get started.

                              Get Sheddie Ready!Read the guide

                              Helpful Articles Visit Our Learning Centre

                              All About Basework

                              Not sure what you need to do to prepare the perfect foundation for your workshop? We’ll keep you on the level.

                              Planning Permission for Workshops

                              Why trawl through your local authority’s website when everything you need to know about how to navigate planning permission is right here?

                              Prefer a brochure?
                              Request a printed brochure sent to you in the post by signing up to our mailing list – where you'll also receive exciting product updates, exclusive offers and so much more...

                                I'm interested in hearing more about:

                                Three Gillies and Mackay Shed brochures on a wooden countertop. The brochures are pale blue and read "Sheds. Gillies & Mackay. Built to last a lifetime."
                                Made to order
                                We can guide you through all the possibilities and design, manufacture and deliver a shed that’s perfect for you.
                                Start your shedlife journey todayGet in touch