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A garden office is the cheapest way to add a proper working room to a house without losing a bedroom or building an extension. We design, build and install insulated garden offices across Northern Ireland and Ireland, specified for full working days rather than occasional use.














A team of qualified tradesmen specialising in insulated garden rooms, working across Northern Ireland and the Republic.
We aim to have our insulated garden buildings completed within 3-5 days to minimise disruption for you.
Confirm your booking with a deposit, make a part-payment on day one of installation, then settle the balance on completion day.
*Finance options now available
The difference between a garden room and a garden office is in the detail. Power and data are planned around where your desk will actually go. Insulation is specified for acoustics as well as heat, so traffic and rain are not competing with your calls. Glazing is positioned to give you daylight without throwing glare across your screen.
Electrics are installed by a qualified electrician, with sockets where you need them rather than one by the door. We advise on hard-wired networking versus wireless depending on the distance from the house, and on heating that warms the room quickly in the morning instead of running all day.
Explore our range of bespoke garden rooms and get in touch via phone, email, or social media to discuss your ideas. You’re also welcome to visit our Garden Room Showroom just outside Newry to experience the quality of our work first-hand.
We provide a free, no-obligation quote and help you choose the ideal size, layout, and finish to suit your space and lifestyle. Once agreed, your booking is secured with a 10% deposit, followed by 50% on day one of installation and 40% on completion. Finance options available.
Your fully insulated garden room is built on site from start to finish, with most installations completed within 3–5 days, depending on your specifications.
Sit back and enjoy your new low-maintenance, year-round space, backed by our 10-Year aftercare warranty for complete peace of mind.
A single desk with storage needs less space than most people expect, but two workstations or a desk plus a meeting chair changes the footprint considerably. We measure for how you will use the room, including where the door swings and where the natural light falls, before quoting a size.
EXCELLENT
Based on 137 reviews
Posted on Google![]()
Stephen LovettTrustindex verifies that the original source of the review is Google.
Great service from start to finish. Highly recommendPosted on Google![]()
Gordon ElliottTrustindex verifies that the original source of the review is Google.
CG Joinery were an absolute pleasure to deal with. They were extremely professional with superb office and onsite teams. The CG Joinery product is excellent and as a company they are agile in meeting the clients needs and wants. 5 star rating without a shadow of a doubt.Posted on Google![]()
Eamon DynesTrustindex verifies that the original source of the review is Google.
Just want to say thanks to one of your lorry drivers. I didn't manage to get his name. I got stuck in a hedge this morning (just outside of Banbridge) and your driver along with a few other lads, got me hooked up and towed me out of the hedge. I am extremely grateful to him. I just want to say thanks again, if you could pass this on to your drivers. Thanks.Posted on Google![]()
Mary McCabeTrustindex verifies that the original source of the review is Google.
We are very happy with our garden room supplied by CG Joinery, All workmen arrived on the date that they had said they would. We got everything we asked for. Would recommend CG Joinery to anybody looking for a nice outdoor room,Posted on Google![]()
Tara MchughTrustindex verifies that the original source of the review is Google.
We recently had a garden room built by CG Garden Rooms and I honestly couldn't recommend them highly enough. From the first conversation right through to completion, the communication was excellent. Every question was answered quickly, timelines were clear, and the whole team was an absolute pleasure to deal with. Nothing was ever a problem. One thing that really stood out was that all materials had to be brought through our house to access the garden. I was quite concerned about this beforehand, but the team took such care and made the entire process completely seamless. They were respectful, tidy, organised and treated our home as if it were their own. The quality of workmanship is outstanding. The attention to detail, finish and overall build quality exceeded our expectations. It's clear that pride is taken in every aspect of the work. What can sometimes be a stressful project was made easy from start to finish thanks to a professional, hardworking and genuinely friendly team. We're absolutely delighted with the finished garden room and have already had so many compliments on it. If you're considering a garden room, I would have no hesitation in recommending CG Garden Rooms. Thanks again to all the team for such a fantastic job. Tara McHughPosted on Google![]()
Ryan OneillTrustindex verifies that the original source of the review is Google.
Absolutely fantastic experience from start to finish! We recently had a garden room, shed, and hot tub room built by CG Joinery and couldn’t be happier with the results. The whole process was incredibly smooth — the team completed everything quickly without any fuss or delays, which was a huge relief. What really stood out was the service. Conaill, Michael and Sarah we dealt with was friendly, professional, and genuinely helpful at every stage. They kept us informed, answered all our questions patiently, and clearly took pride in their work. You could tell they cared about getting every detail right. The finished garden room looks brilliant and has already become one of our favourite spaces. The shed is solid, practical, and exactly what we needed for storage, while the hot tub room is a real standout — beautifully finished and the perfect place to relax. Highly recommended if you’re looking for quality workmanship delivered with real care and efficiency. We wouldn’t hesitate to use them again!Posted on Google![]()
Johanne SmithTrustindex verifies that the original source of the review is Google.
We couldn’t be happier with our new garden room from CG Joinery. From the very first meeting right through to completion, the entire team has been fantastic to deal with. Their workmanship, attention to detail and professionalism have been outstanding. Nothing was ever too much trouble. The quality of the finish has exceeded our expectations, and it’s clear they take enormous pride in their work. The team were punctual, friendly, hardworking and left everything clean and tidy. It’s rare to find a company that delivers exactly what they promise, but CG Joinery certainly did. If you’re thinking of adding a garden room to your home, I wouldn’t hesitate to recommend CG Joinery. A first-class company delivering a first-class product. Thank you to everyone involved—we absolutely love our new space!Posted on Google![]()
Tadgh McCauleyTrustindex verifies that the original source of the review is Google.
Top class work by the CG Joinery. No problem in building the garden room to my specific requirements. Highly recommendPosted on Google![]()
Jane MullaneTrustindex verifies that the original source of the review is Google.
I cannot speak highly enough about the CG Joinery team. Everyone from the office to the guys who come and build are a pleasure to deal with and go above and beyond to advise and support. You won’t go wrong with them and you’ll have a gorgeous room at the end!
A small garden still takes a working office. We use slimmer depths and corner placements, with glazing that keeps the room feeling open rather than boxed in. If access is tight we will say so at survey rather than on installation day.
Composite cladding holds its colour and needs almost no upkeep, which matters on a building you will look at from the house every day. Timber gives a warmer finish and wants occasional treatment. Internally we finish to a standard you would accept indoors, not shed-grade lining.
Every office is drawn around your plot, your access and your working setup. Door position, window layout, socket placement and internal finish are agreed with you before we build anything. Nothing is taken from a standard catalogue size.
Plenty of our clients run their business from a garden office. Practical matters worth planning for are reliable broadband, adequate power, somewhere secure for equipment, and whether clients will visit. Tax treatment and insurance vary by circumstance, so speak to your accountant and insurer — we can tell you what we have built for others, not what your position will be.
An office is no use if it is unusable in January. Walls, floor and roof are insulated, glazing is specified accordingly, and heating options are discussed at survey. The aim is a room that holds temperature rather than one that needs a heater running constantly.
We work throughout Northern Ireland and the Republic from our base at Mayobridge, Newry. That covers Belfast, Lisburn, Derry, Newry and the surrounding counties, and across the border through Louth, Dublin, Meath and beyond.
Tell us how you work and roughly what space you need, and we will arrange a site survey and a written fixed quotation. We are at 7 Ryan Rd, Mayobridge, Newry BT34 2HZ. Call (NI) 07702 909637 or (ROI) 089 277 2494, or book a showroom visit to see the build quality in person.
We’re dedicated to making high-quality garden rooms accessible to everyone. With flexible financing options, you can explore ways to fund your garden room project without stretching your budget. Our team can guide you through the process with a simple, no-obligation soft credit check.
To see the quality and variety of our garden rooms, we invite you to visit our showroom. Here, you can explore the range of finishes, layouts, and materials in person and get inspiration for your project. Our team will be on hand to answer any questions and provide guidance based on your preferences.
With CG Garden Rooms, you’re not just getting an extra room, you’re investing in a versatile, beautiful space that enhances your lifestyle. Whether it’s for work, relaxation, fitness, or creativity, our garden rooms are custom-built to enrich your home and create value for years to come.
Often it falls within permitted development, but this depends on floor area, height, distance from boundaries and how much of the garden is already built on. Rules differ between Northern Ireland and the Republic. We advise on your specific site before you commit.
Electrics are installed by a qualified electrician as part of the build. For internet we advise on hard-wired networking versus wireless depending on the distance from the house, so you are not relying on a weak signal at the end of the garden.
€1500 off all garden rooms if you book in July. Don't miss out!