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CG Garden Rooms

Garden Offices

Garden Offices in Northern Ireland & Ireland

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.

Reliable & Qualified Experts

A team of qualified tradesmen specialising in insulated garden rooms, working across Northern Ireland and the Republic.

Quick Turnaround

We aim to have our insulated garden buildings completed within 3-5 days to minimise disruption for you.

Competitive & Flexible Prices

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

Built for Working, Not Just Sitting

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.

Power, Data and Heating

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.

How It Works

01

Discover

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.

02

Design & Book

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.

03

Build & Install

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.

04

Enjoy

Sit back and enjoy your new low-maintenance, year-round space, backed by our 10-Year aftercare warranty for complete peace of mind.

Sizes That Suit Real Work

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
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Based on 97 reviews
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Owen O B profile picture
Owen O B
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We had a garden room built by CG Garden Room in May. Very happy with how it turned out. Arrived exactly when they said they would and built it to our exact requirements. The whole job was finished in 4 days. Very professional and nice people to deal with.
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deborah Carr profile picture
deborah Carr
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We recently had a garden room built, and I can honestly say the whole experience was a pleasure from start to finish. The team were friendly and easy to have around from day one - polite , respectful, they turned up when they said they would each day, got straight on with the job, and worked efficiently until completed. The finish was precise, tidy and solid, it was clear they do things properly and don't cut corners. We are absolutely delighted with the result and wouldn't hesitate to recommend Conaill and his team to anyone looking for a room built by reliable, hardworking guys who know their trade and take pride in their work.
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Toni Hollowell profile picture
Toni Hollowell
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From start to finish the lads at CG Joinery were excellent to deal with! They were really helpful in discussing options, sizes, plans and models of the garden room over the phone and via Teams calls. They responded quickly to queries and made it an easy decision to travel from Galway to Newry to visit the showroom before the final design was agreed. The garden room was installed last week, after a long but very worthwhile wait - no delays, we were told when ordering it would be December, just in time for Christmas. The install team were amazing. Professional, tidy, courteous and trojan workers! Our 35m2 room was up and finished within 28hrs - built, floored, plastered with lights and heat working! They arrived at 7.30am one day and had completed the build and cleaned up by 10.30am the following day. We are more than happy with the result and feel the quality, workmanship and speed in completing the build was worth every penny. We would highly recommend CG Joinery if you're considering them.
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Hollie profile picture
Hollie
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I was lucky enough to win a competition on Instagram for a garden room with CG Joinery. It was honestly the most emotional experience I’ve ever had as this was something I have dreamt of putting in my back garden since we bought and renovated our house in March ‘23. We put a lot of money towards the win to extend our garden room and I worried this would cause hassle. Instead, it was the smoothest process ever! Conaill was always a phone call away over the months or back and fourth planning. Sarah was always at the end of every email and responded instantly. The men that came to built our dream garden room were so lovely, so easy to host and so lovely to chat about to. Every single person on the team takes their roll very seriously and you could see and hear that while they worked. They were at our door at 7:15 am and did not finish up until 7pm that night. The following day they had a 7:30 start time and the job was complete by 9:30am. I could not get over how quick they had it complete. It went to show that experience from highly skilled workers pays off. I will continue to recommend CG Joinery as in today’s world, it is very easy to get people who are looking for the money but don’t want to do the job. It makes it very hard to trust anyone anymore. But CG Joinery are whole heartedly involved and encouraging to do every job right and to the best standard! HIGHLY HIGHLY RECOMMEND! Hollie Dunlea.
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Valbona M profile picture
Valbona M
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Absolutely delighted with our garden room from Garden Rooms by CG Joinery. The quality of workmanship is excellent, the team were professional and reliable, and the whole process was smooth from start to finish. The garden room looks fantastic and has exceeded our expectations. Highly recommended. We wouldn’t hesitate to recommend Garden Rooms by CG Joinery to anyone considering a garden room — outstanding quality and a fantastic service from start to finish.
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Ben Gilmore profile picture
Ben Gilmore
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Just had my garden room and shed finished and we are over the moon, brilliant having it up and ready for Christmas 😅🎄 top class service, thank you very much!
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Sharon Owens profile picture
Sharon Owens
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Fantastic from start to finish great group of lads especially ethan.Hard workers v polite.would highly recommend great workmanship high quality finish inside and outside. Delighted with my garden room.
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Keith Richardson profile picture
Keith Richardson
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Great service. There's a wait time but the room was built very quickly and to high quality. Way more economical when compared to an extension. The design your own room tool is also fab.
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Jonathan D'Arcy profile picture
Jonathan D'Arcy
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CJ joinery is one of the most professional companies I’ve ever dealt with, the team are super professional, have great work ethic and deliver the best standards. We got a garden room and shed combo and from start to finish the experience was amazing. Would recommend to anyone in Ireland!

Compact Garden Offices for Small Gardens

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.

Cladding and Finish

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.

Made to Measure for Your Garden

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.

Running a Business From a Garden Office

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.

Insulated for Every Season

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.

Garden Offices Across NI and Ireland

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.

Get a Garden Office Quotation

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.

Finance Options Available​

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.

Visit Our Showroom​

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.

Transform Your Outdoor Space​

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.

Frequently Asked Questions

Yes, and many of our clients do. Plan for reliable broadband, enough power, secure storage and sensible access if clients will visit. Tax and insurance treatment depends on your circumstances, so check with your accountant and insurer.

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.

Yes, provided it is built for it. Insulated walls, floor and roof with appropriate glazing mean the room holds heat, so a modest heater is enough on cold mornings.

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.

Need more info?

Give us a call to discuss what you have in mind. We would be glad to help, and we can provide a competitive quote for the work.

€1500 off all garden rooms if you book in July. Don't miss out!