Current lead time:
                              mid October 2026
                              Current lead time:
                              mid October 2026
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                              30
                              Year
                              Guarantee
                              Polyhedron phenomenon

                              The Kindrogan is a pyramid roof on a Rannoch body, a hybrid design to give you the best of both worlds.

                              Much like The Rannoch, The Kindrogan Garden Room gives you the versatility of the square/rectangular room for the best use of space whilst having the extra finesse of the shaped roof – which comes with Isola shingles as standard.

                              four-Layer Engineered Construction

                              Double-Glazed Aluminium Doors & Windows

                              Radiata heat-treated 50-year life cladding

                              35+ years in business
                              Independent, family-owned
                              Built in our workshop
                              Delivered by our own team
                              No Planning Permission Needed

                              Dreaming of a garden office, creative studio, or peaceful retreat – without the planning permission headaches?

                              Every Radiata Garden Room is designed to meet permitted development guidelines, so in most cases, you can skip the red tape and get straight to enjoying your new space.

                              (Just double-check location-specific rules like conservation areas or listed buildings)

                              Radiata Thermowood Cladding

                              Naturally beautiful and incredibly durable, Radiata ThermoWood is heat-treated to resist moisture, rot and decay – and comes with a 50-year lifepsan.

                              Its smooth, knot-free finish gives your Garden Room a sleek, modern look, while drastically reducing the need for timber maintenance. A premium external cladding choice that’s built to look fabulous for decades.

                              Superior Slimline Aluminium
                              Double Glazing

                              Strong, stylish, and built to last – our aluminium double-glazed windows outperform standard uPVC in both durability and design.

                              The slimline frames let more natural light flood into your Garden Room, while still delivering top-tier thermal insulation. A perfect blend of modern aesthetics and year-round comfort.

                              Fully Insulated

                              Your Garden Room should feel just right, no matter the season.

                              With high-performance insulation in the walls, roof and floor, premium double glazing, and careful construction, our Radiata Garden Rooms are designed for year-round use – keeping you warm in winter and cool in summer.

                              Whether it’s your workspace, retreat, or creative studio, it’s a space you’ll love every day of the year.

                              Isola Shingle Roofing

                              The Kindrogan is finished with Isola shingles – a premium, sustainable roofing material sourced from Norway and available in the UK exclusively through Gillies & Mackay.

                              They replicate the look of traditional slate, giving these designs a more refined, classic finish while still standing up to Scotland's weather. Isola shingles carry a 30-year guarantee, reflecting their durability and long service life. For buyers drawn to the shaped pentagonal roofline of the Kindrogan, Isola shingles add the extra touch of craftsmanship that suits their more distinctive silhouette.

                              Delivery & Installation Included

                              Every Radiata Garden Room comes fully delivered and installed as standard – no separate contractor to arrange, no added complexity.

                              Our team handles delivery within 40 miles of Errol as part of the price, with only a small charge for anything further afield. Once on-site, your building is assembled and finished, by our experienced team.

                              It's one less thing to organise during what can otherwise feel like a complicated project, and it means your Garden Room is put up properly, by people who build them every day.

                              Is a Radiata Right for You?
                              Under 12m² footprint
                              Sits outside Building Control – typically no planning permission required.
                              Fully insulated
                              Walls, roof and floor – meaning it's going to be comfortable all year round.
                              Simple groundworks
                              Thanks to the simplified design, only a level slabbed area or ground screws are required.
                              30-Year Guarantee
                              Unmatched at this price point – full stop.
                              FACT CHECK:
                              Most small garden rooms are either too cheap to last, or too much spec for what you need
                              There's a reason "under 12m²" isn't just a size – it's a different way of building. Before you choose a garden room, it's worth understanding what makes ours different.
                              Building Specs
                              (for illustrative purposes only)
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                              Shape & Style
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                              Sizes & Pricing
                              Size
                              Price
                              3m
                              x
                              2.4m
                              £14,357
                              3.6m
                              x
                              2.4m
                              £15,649
                              3m
                              x
                              3m
                              £15,649
                              enquire about this designSpeak to our team
                              What's Included?
                              4-layer wall construction
                              Radiata ThermoWood cladding, insulation board, breather cavity, V'd redwood lining
                              Radiata Pine ThermoWood cladding
                              Factory-treated for moisture / rot / insect resistance
                              Osmo WR Base Coat protection on the outer cladding
                              1 set aluminium double-glazed double doors
                              2 x aluminium double-glazed opening windows as standard
                              Isola shingle roofing
                              19mm tongue-and-groove Scandinavian redwood sub-floor
                              16mm Scandinavian Redwood roofing boards
                              50mm insulation in walls, floor and roof
                              Delivery & Installation within 40 miles of Errol
                              Small additional charge for deliveries outwith this area
                              VAT included
                              Project management of whole build as standard
                              30
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                              Gillies & Mackay's 30-year Guarantee
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                              30
                              Year
                              Guarantee
                              Your G&M is Built to Last – Guaranteed
                              Since 1989, our dedication to quality has ensured that our Garden Rooms, Garages, 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 a lifetime.
                              Read our guaranteeConditions apply
                              Upgrade Your Building
                              Guttering

                              The Radiata Garden Rooms do not come with Guttering as standard. We advise that all basework be constructed with a soakaway in mind to allow the water to run off the roof and be drawn away from the building.

                              It would be advisable for larger sizes to opt for guttering given the amount of water they shed.

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                              Guttering Upgrade Cost
                              Size
                              Price
                              3 x 2.4m
                              £350
                              3.6 x 2.4m
                              £350
                              3 x 3m
                              £350
                              Laminate Flooring

                              Radiata Garden Rooms are constructed with a 19mm thick tongue and groove subfloor. The subfloor is not advised to be used as the finished floor.

                              We offer laminate flooring as an optional extra, in three colours specially chosen to compliment the beautiful Radiata ThermoWood. If you'd prefer a different floor covering, you will need to arrange this yourself.

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                              Laminate Upgrade Cost
                              Size
                              Price
                              3 x 2.4m
                              £750
                              3.6 x 2.4m
                              £910
                              3 x 3m
                              £910

                              Find Out What Your Garden Room Really Costs – Start to Finish

                              Using this estimator will give you a true reflection of your full project cost – not just the garden room itself. See how your design, size, and options come together in a transparent G&M estimate.
                              We take care of all the complicated stuff
                              Included with all Radiata Garden Rooms, we handle your entire garden room project from start to finish. You'll get our 35+ years of experience without having to lift a finger – no chasing different contractors and organising timelines yourself – our expert team sees the whole thing through.
                              Your Consultation
                              Whether you’ve got a rough idea, some measurements, or a full plan, this is where we bring it all together. We’ll talk through everything, refine your vision, and create a detailed design brief and quotation.




                              Site Visits
                              We visit the proposed site to confirm everything is feasible and to help ensure smooth delivery. We’ll also coordinate with any groundworkers or electricians who need access. If planning permission is required, we can handle the application and all related communications.




                              Order Confirmation & Delivery Dates
                              Once you’re happy with the full project cost – including the building, groundworks, electrics, and any extras – you’ll pay a deposit, and we’ll schedule your delivery and assembly.




                              Groundworks

                              We provide your chosen contractor with the specifications for your garden room's base. Once the base is completed and signed off, you’re ready for installation.





                              Garden Room Construction
                              It's the big day! On delivery day, our team will assemble the main construction – the floor, walls and roof will be put together, ready for lining and insulation and flooring on the next visit from our team.




                              1st Electricians Visit
                              If you're adding electrics to your garden room, this will take place next – the electrician runs all the cabling for lights and sockets through the open stud frame, so wiring can be neatly sorted and hidden once the lining goes up.




                              Lining and insulation
                              We return to insulate and line the building, enclosing the wiring inside the wall and ceiling cavities so nothing's visible in the finished room. Now it's really coming together!




                              2nd Electricians Visit
                              Once lining is done, the electrician returns to fit the actual sockets, switches, and light fittings onto the now-hidden wiring, and completes testing/certification.
                              Start your Garden Room Journey with us
                              We’ve handled hundreds of builds, so you can trust us to get every detail spot on. All you need to do is decide what to put inside.
                              Ready to talk Garden Rooms?Speak to our team
                              Frequently Asked Questions
                              Trusted by Sheddies for Over 35 Years
                              95+ Customer Reviews – Rated 4.9 out of 5
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                              Jackie Macintyre

                              We purchased our bespoke garden room in June 2024. The quality and finish is just superb. Communication and service from start to finish from the G&M team was second to none.

                              View More Reviews on Google
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                              Sharon Comrie

                              We are so happy with our garden room, we bought in April this year, it is our little sanctuary where we can relax and chill out in peace. Gillies&Mackay have been brilliant the build work is professionally done, the electrical people they put you in touch with where also great. I would encourage everyone who were thinking of having a summerhouse to have a chat with Gillies & Mackay you won’t regret it, also the garden room is very versatile it can also be an office or spare room whatever you need it for, money well spent we feel. Thank you Gillies & Mackay!

                              View More Reviews on Google
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                              G B

                              Had a garden room built from G&M Aug 22. A really good experience and they made a fantastic job. Had 17 months enjoying the garden room. A couple of weeks ago I noticed the door had moved ever so slightly…..couple of cms. I phoned G&M looking for a wee bit of advice but got way better than that. Callum has been out and fixed the door. I can’t speak highly enough of this company, from the instillation to the wee fix 17 months later. And also Nicola who went above and beyond as well. Highly recommended.

                              View More Reviews on Google
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                              Alasdair Kettles

                              Great Service, looking forward to enjoying the Scottish Summer in our Garden room 😁
                              Really good to see a local business doing such a good job.

                              View More Reviews on Google
                                Explore Radiata Designs
                                Our Ratiata Garden Rooms come in four beautiful designs, with a range of shapes and sizes to choose from. Whether you want that classic apex roof look, or something designed to tuck neatly into the corner of your garden – you'll find your all-season sanctuary.

                                Read our prep guide

                                Sheddies! You've probably got some questions about the prep work required to get ready for your new Radiata Garden Room.

                                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 garden room? We’re here to help.

                                Planning Permission Essentials

                                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...

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                                  Want to know more?
                                  We can guide you through all the possibilities and design, manufacture and deliver a garden room that’s perfect for you.
                                  Start your shedlife journey todayGet in touch