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Reviews
Over 40 verified 5‑star Google reviews from homeowners across North Down, Belfast and surrounding towns.
Projects include home extensions, loft conversions, garage conversions and internal alterations.
All completed with clarity, communication and a considered approach to design.
Ready to start your own project? Submit your enquiry using the online form.
Leave a Review
Share Your Experience
Your feedback means a lot. If you’d like to share your experience, please leave a review by clicking the button below — it helps others find trusted design support.
If you prefer to share feedback privately, you’re very welcome to email me directly. If you’re happy for your comments to be shared on my reviews page, just let me know.
What Homeowners Say Most Often
These are the comments I hear most often from homeowners after their projects are complete:
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“Reliable, affable and enthusiastic - sees solutions rather than problems.”
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“Planning permission granted within weeks.”
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“Detailed drawings that sailed through Building Control.”
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“Made the whole process stress‑free.”
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“Ideas we’d never have considered.”
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“Transparent, fast and extremely knowledgeable.”
What Clients Say
Every review below is verified and written by a homeowner who worked directly with GT Building Design.
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Michael - Belfast
“We consulted Glenn regarding a loft conversion to an en‑suite bathroom. Our experience of working with him has been first rate from start to finish.
He is reliable, affable and enthusiastic, and sees solutions rather than problems. He took us through all the stages, made practical suggestions, and incorporated what we wanted into the design.
His drawings and specifications were produced quickly and progressed smoothly through Building Control. We have no doubt Glenn will continue to advise and assist us when we revisit the project.”
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David & Pauline - Newtownards
“From our first meeting with Glenn we felt comfortable.
He listened to our suggestions and incorporated them into his drawings, while adding ideas we would never have considered.
He guided us through the planning application and building control process and was always friendly, open and someone we could trust to keep us right.
Now that all the work is finished, we are so glad we used GT Building Design.”
Aisling & Philip - Belfast
“Our experience of adding an extension to our house was very positive, and having Glenn guide us through the planning process was so helpful.
His professional, friendly and methodical approach was very reassuring. His expertise with planning officials and the completion of all the forms removed a lot of pressure.
We were delighted with the end result and would recommend him to anyone looking for a quality service from start to finish. We’re already looking forward to working with Glenn again.”
You're In Safe Hands
Every project is handled personally, from the first conversation to final Building Control approval. If you’d like to explore more of my work, visit my Projects page.
Thank you to everyone who has taken the time to share your experience. Glenn
All Reviews
"Glenn did the drawings for our kitchen extension and redesign of our downstairs layout, which we have just completed. We are delighted with the end result. Every detail has been thought about and it makes such a difference to how we use the space. He also did all the admin behind submitting the drawings to planning etc which was such a help. I would highly recommend."
Anne Gilroy, Donaghadee ⭐⭐⭐⭐⭐ 5 Stars on Google
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"The house we bought had an existing extension and we wanted to reconfigure the internal layout to create a modern open plan space. While I knew in overall terms what I wanted to create I found it difficult to visualise how the space would work. Glenn prepared detailed drawings for us and made suggestions and alternative plans which were invaluable. He organised a structural engineer and dealt with the building control side of things seamlessly, giving us an exact plan to provide to building contractors. An excellent service from Glenn who is friendly and approachable and was always willing to discuss aspects of the plans."
Jac Callan, Bangor ⭐⭐⭐⭐⭐ 5 Stars on Google
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"Glenn provided us with a fantastic service, thanks to his expertise and efficiency we had planning permission granted within a matter of weeks after submitting plans for our two story side extension & renovation. It was a pleasure to work with Glenn and we would strongly recommend GT Building Design. Thank you very much, Charles."
Charles Casey, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"GT Building Design drew up plans for a replacement conservatory we were having done. Glenn was very helpful, professional and approachable. We are delighted with the final result and would definitely recommend his work."
Lynne Williamson, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn recently completed the design and architectural work for me taking his detailed drawings right through the planning office process and building control.
My job was for him to design and generate the drawings to build a large en-suite bedroom above a flat roof garage/kitchen and also a new utility room off the kitchen and a large living room in in the garden with apex roof. During the process Glenn worked with a firm of structural engineers and oversaw the detailed structural requirements that he then included in his drawing package to building control.
From the moment I met with Glenn at my property I felt comfortable. Glenn has been doing design and the architectural drawings for more than 35 years. It’s easy to tell he takes great pride in his work and will take the time to get it just right for you with your feedback. His style is relaxed and reassuring making you feel you are in safe professional hands. His drawings are very detailed that in my case it enabled the planning office to grant the approval without changes. Great Job Glenn"
Albert McAlpine, Donaghadee ⭐⭐⭐⭐⭐ 5 Stars on Google
"Embarking on any building project can be a very daunting task, and when we decided to knock down our then holiday home to build our home of the future we set about finding the right partner to ensure we got things right.
We found Glenn’s details in a local ad, and arranged to meet him. From the outset Glenn impressed us with his knowledge, professional approach and enthusiasm for our project. Having reviewed what work he had done, we were confident we had found the right man for our job. We appointed Glenn, and he designed us the ideal home making full and best use of our site. Importantly Glenn also produced a comprehensive 34 page tender document covering all aspects of build that proved to be invaluable.
We thank Glenn hugely for helping us with what could have been a very stressful experience, and helping us achieve our dream home.
Tommy Charteris, Donaghadee ⭐⭐⭐⭐⭐ 5 Stars on Google
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"I wanted to open up the downstairs of my house in order to make the best use of the space available. Glenn reassured me and showed me what was possible. I'm delighted with the finished open plan living space. I would highly recommend his services."
Wendy Jenkins, Gilnahirk ⭐⭐⭐⭐⭐ 5 Stars on Google
"We are really loving the new extension to our kitchen and living area and for the space that it has created for us to host our children and grandchildren. It has been a pleasure to work with Glenn. We so appreciated his "hands-on" approach and all his guidance and expertise throughout the entire project."
Paul Cupples, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
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"We consulted Glenn regarding a loft conversion to an en suite bathroom. Our experience of working with him has been first rate from start to finish.
Firstly, his personal traits. Importantly he is reliable – when he says he will visit, call you or meet some deadline, he fulfills whatever commitment he has made. He is affable and enthusiastic, and sees solutions rather than problems. Secondly, he is experienced and professional.
He took us through all the stages needed to complete our project, made useful and practical suggestions we hadn’t considered, and incorporated what we wanted into the design.
This resulted in the quick production of drawings and specifications which he then progressed through Building Control approval. Unfortunately, COVID 19 has delayed building work beginning.
However, we have no doubt Glenn will continue to advise and assist us whenever we can revisit the project."
Michael Brown, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
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"From our first meeting and then subsequent meetings with Glenn we felt comfortable with him. This was because he listened to our suggestions and incorporated them into his initial drawings. Drawing on his expertise, he came up with several ideas we would not have considered. He guided us through the planning application and subsequent building control. Glenn was always friendly, open and someone we could trust to "keep us right" Now that all the work is finished, we are so glad we used GT Building Design"
David & Pauline Murdoch, Ards. ⭐⭐⭐⭐⭐ 5 Stars on Google
“Our experience of adding an extension to our house was a very positive one and having Glenn guide us through the planning process was so helpful. From the initial visit to our home and drawing up plans right through to that final call to tell us that our planning application was successful.
Glenn's professional, friendly and methodical approach was very reassuring. His expertise in dealing with planning department officials and completion of the myriad forms removed a lot of pressure and allowed us to focus on other aspects of the job.
We were delighted with the end result and would recommend him to anyone who is looking for a quality service from start to finish. We are on the lookout for a new project and are looking forward to working with Glenn again in the near future!”
Aisling & Philip Pelan, Belfast. ⭐⭐⭐⭐⭐ 5 Stars on Google
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"Glenn was excellent and highly recommended. He was professional throughout and always delivered within the agreed timescales, which for me is very important. His attention to detail was outstanding"
Alyn Spratt, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
“Dear Glenn, thank you for forwarding on all the relevant documents which I will keep safe. I appreciate so much all the expert advice you have given to me, and all the consideration and patience! You are an angel, yours sincerely Sylvia .”
Sylvia Higgins, Lisburn. ⭐⭐⭐⭐⭐ 5 Stars on Google
“Glenn has been incredibly helpful with me. I got in touch with him at the beginning of February 2023, explained my circumstances and requirements.
Glenn moved really quickly and worked with me to get everything done from the initial drawings to design. He submitted everything to planning and building control and got my plans approved really quickly with both authorities.
Glenn was recommended to me by Knox and Markwell Architects in Bangor, and I am very grateful for that recommendation, because Glenn has been fantastic throughout. I can wholeheartedly recommend Glenn.”
Shaun Brady, Bangor. ⭐⭐⭐⭐⭐ 5 Stars on Google
"Within a tight time frame Glenn worked quickly and efficiently to draw up plans for a beautifully designed single storey extension to my bungalow. He was very professional, patient and helpful at all times, dealing promptly with any queries. He kept me informed throughout the whole process, and I was really delighted with his service."
Allwyn Corrin, Gilnahirk ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn delivered excellent work on our loft conversion plans, bringing ideas we hadn’t considered, taking onboard all feedback and responding promptly to queries. Glenn provided high quality detailed plans and documents, and liaised with the council to secure planning permission & building control approvals swiftly, handling the entire process on our behalf. Glenn was a pleasure to work with and I highly recommend"
Alan Caughey, Crawfordsburn ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn helped us with planning our extension ( single storey rear and side extension). The whole process was seamless from start to finish. Glenn was very professional and his experience was clear to see.
He designed our extension to take into account our family dynamics and came up with good ideas to suit our needs which I would have never thought of. He was prompt in responding to any queries we had and any changes we wanted to make he was able to clearly tell us pros and cons of any changes. He completed several designs for us and we were able to pick the one that suited our budget and needs best.
Glenn took charge and was able to do everything regarding application for planning permission and building control ..all of which I was clueless about. He gave us realistic timescales in terms of our planning permission application and gave us regular updates. Also kept us in the loop by cc'ing us into emails he had with planning permission and building control/ structural engineer. This was reassuring as waiting on planning permission can be frustrating.
I would highly recommend Glenn for any extension projects."
Nadia Irwin, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn is excellent, super efficient and extremely knowledgeable about building control processes and applications. His efficiency took the stress out of our recent extension. I would highly recommend GT Building Design for any renovations that requires drawings and building control applications.
You will not be disappointed with quality of work, efficiency and price!"
Gráinne Nic Fhirléinn, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn worked hard on my project, kept me well informed and achieved the planning and Building Control permission needed. Would definitely recommend him."
Mark Caldwell, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn offered a full design and planning service for an extension to our home. Handled everything from start to finish, very friendly, extremely knowledgeable and helpful especially in relation to getting our planning application approved. Thanks for the great service Glenn."
Christopher Orr, Holywood ⭐⭐⭐⭐⭐ 5 Stars on Google
"I got in touch with GT Building Design about the possibility of a kitchen extension in March 2025. It's now July 2025 and I'm pleased to say our project has just passed both planning and building control thanks to Glenn.
Right from the first email, I knew Glenn was the right man for our project. His very clear, calm approach to the work shone throughout and honestly he was a pleasure to work with. His website is filled to the brim with lots of examples from his previous projects and other info which we found very helpful.
Whether it was a phone call or a visit to our house, he listened every step of the way to our ideas and feedback and offered useful advice where we needed.
Glenn's final plans for our project are extremely detailed and they sailed through planning and building control with ease due to his extensive knowledge and experience. We cannot wait to begin work on our dream kitchen space and we have nothing but good words to say about working with GT Building Design.
To anyone in Northern Ireland looking for someone to work with at the beginning of an extension project like ours, we would definitely recommend getting in touch with Glenn at GT Building Design.
Thanks Glenn! We're looking forward to having you visit our project once it's all finished."
Ross McCon, Bangor. ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn was excellent from start to finish. We purchased a new property which needed a full internal renovation. Glenn helped with plans, building control applications, structural calculations and general queries we had. His help was immeasurable with getting the project off the ground and gave us huge confidence when engaging with contractors and trades.
Glenn’s expertise and knowledge are vast and he was easily contacted throughout the process which again filled us with confidence. We would 100% recommend GT Building Design to anyone requiring these services."
Kiara & Charlie, Belfast. ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn is the antidote to the perils of planning, his knowledge experience and calm calculated focus, all presented with a genuine pleasant, patient and supportive demeanour, leave you feeling informed and safe throughout the whole journey, we could not have hoped for any better.
thank you"
Lee Ward, Bangor. ⭐⭐⭐⭐⭐ 5 Stars on Google
"I would highly recommend GT Building Design if you are thinking of extending or new build. Glenn made the whole process incredibly straight forward and really helped us to get off the fence and make our ideas a reality. We were very impressed with the speed at which everything moved and how transparent his process is, you will have no regrets, thank you!"
Patrick Hudson, Comber. ⭐⭐⭐⭐⭐ 5 Stars on Google
"I would just like to thank Glenn for firstly his professionalism and secondly his quick and thorough work. Glenn was contacted only a couple of weeks ago and already has completed our work and has assisted with our application process for planning permission. For someone who has no experience in this, he has made the process stress free. I would highly recommend"
Jonathan Maguire, Millisle. ⭐⭐⭐⭐⭐ 5 Stars on Google
"Thank you so much for your services! The whole process was easy and stress free! Can’t wait for drawings to come to life"
Eiran Simmons, Ballyholme ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn managed the Design, Planning Consent and outline Building Control Approval for a beach front cottage extension at Ballywalter. I found him highly professional, knowledgeable and efficient with a great attention to detail. At the outset he defined the stages (and associated costs) of the project and these proved to be entirely 'on the button'. I would have no hesitation in recommending Glenn to any prospective client.
Linda Beers, Ballywalter ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn was very professional, understanding of what we needed and patient with us from start to finish on our garage conversion project. We got through planning and building control approval extremely quickly which was great with no hiccups. I would gladly recommend him to anyone based on our experience. Thanks again Glenn"
Aaron Henderson, Newtownards
⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn helped with the design and planning / build regs application for a large detached sunroom / garden room. Very smooth process from start to finish, listened and drew designs incorporating all that I asked for. Planning & building regs application went without issue. Good lines of communication throughout and timely replies. Would highly recommend!"
Pete Beck, Holywood ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn was very professional and great at guiding us through the complicated process of designing a home extension. He has a keen idea for detail and he made very good suggestions based on his experience which helped form our decision on the extension. Would definitely recommend."
Stephen McIlhatton, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn recently helped us with the plans and building control application for an extension on to the side of our house. His experience shone through with each step of the process from the initial drawings, to going through the steps for building control approval. He really made the whole process hassle free and was able to successfully sort out any amendments to the plans quickly in order to keep the process moving along and have the whole thing complete much quicker than I would have thought possible!"
Shona Barker, Belfast ⭐⭐⭐⭐⭐ 5 Stars on Google
"Would highly recommend Glenn's services. Very professional and provided a high quality service in a timely manner."
Marion Ritchie ⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn was very helpful with regards my garage project. He provided lots of specific details for the builder and produced scale drawings within a very short time period. A great service."
David Bradshaw, Bangor, County Down
⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn was attentive and patient, listening to our needs. He delivered a prompt, cost effective and very professional service."
Wendy Conway, Bangor ⭐⭐⭐⭐⭐ 5 Stars on Google
"Highly recommend Glenn, he did technical drawings for an extension, and provided a really exceptional service. He was professional and communicated everything clearly throughout the process. Would definitely use again."
Ewan Lockhart, Belfast
⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn has been a pleasure to work with. He has been a great support to us as we navigated initial ideas and concepts for a single storey extension and ensuite bathroom. I found Glenn's communication excellent, he kept things moving at pace and responded promptly to the many questions I had! Thanks to Glenn we have now successfully navigated planning and building control in a relatively short space of time. I would recommend Glenn's services for anyone considering an extension or new build."
Chris Cupples, Belfast
⭐⭐⭐⭐⭐ 5 Stars on Google
"I'm delighted to recommend Glenn's services. From the outset he responded promptly to our enquiry, fully explaining the service he provided and the costs etc. He visited our home promptly and on time, to discuss our garage conversion project. We had a rough idea of what we wanted to achieve, but with Glenn's experience and skill he suggested an alternative plan we had not considered, and which we eventually went with.
His drawings and specifications were extremely detailed and very impressive, leaving no detail to chance and giving us confidence that the finished product would be of a very high standard. He managed the process of obtaining planning and building control approval, keeping us updated regularly on progress. When it came to selecting a builder Glenn was again very helpful, and we currently have an excellent builder on site helping to realise the project.
Glenn always dealt with us in a very courteous manner, and it has been reassuring to have him in our corner during what can be a very stressful process. I have no hesitation in recommending Glenn to anyone whatever their project, big or small. Thank you Sir for helping us with ours."
Chris Haggan, Newtownards
⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn was very understanding of our needs and budget and helped us get a design that fitted our expectations. Very easy to talk to and jargon free, took us through the process of getting a builder involved and what that entailed and then through the planning process from start to finish. Great service."
Carl Thompson, Donaghadee
⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn is really easy to work with and is open to different options as plans and budget can change. Nothing is too much bother and he turns around work really quickly and efficiently. Really appreciate his help and guidance throughout this project and will recommend him to everyone we meet"
Rebecca Ellison, Bangor
⭐⭐⭐⭐⭐ 5 Stars on Google
"Glenn did a first rate job. He was attentive and prompt. The drawings for our extension were meticulous and praised by the City Council. He left nothing out and his service was excellent throughout the whole process. I have no hesitation in recommending him to you"
Paul and Priscilla Reid, Belfast
⭐⭐⭐⭐⭐ 5 Stars on Google
“During July 2014, we decided to extend instead of move house, and hired Glenn to provide the drawings. What an excellent job Glenn did for us. He was fast, efficient, and kept us updated each step of the process. He took all the stress out of the process by notifying the neighbours, notifying the Planning Office, and worked closely with our builder.
He supplied a full written quotation, with a clear itemised price of each stage, and forwarded all important documentation quickly. Planning Service rejected the first set of drawings, but Glenn phoned us immediately to discuss alternatives, which were passed the second time, and nearly a year to when we started the application, we are delighted with the end result.
We definitely recommend Glenn for his professionalism and expertise.”
Campbell and Maureen Beers, Bangor.
⭐⭐⭐⭐⭐ 5 Stars
"Hi Glenn. This is just a little note to thank you for the professional, prompt and efficient way that you have designed the plans for my new garage. I am really pleased with the drawings and looking forward to getting the work started as soon as possible! It has been a pleasure dealing with you and I will be happy to recommend your services in the future. Regards Bryan"
Bryan Halpin, Groomsport.
⭐⭐⭐⭐⭐ 5 Stars
"Glenn has done design work for me on a house extension and in support of retrospective planning and building control applications. He brings a degree of expertise that makes the process straight forward and always delivers efficiently and on time. Easy to work with too, which is always a bonus. Highly recommended"
Will Brown, Donaghadee. ⭐⭐⭐⭐⭐ 5 Stars
"We engaged Glenn to make substantial amendments to plans for refurbishing the ground floor of our house on the recommendation of our builder. From the outset, we found Glenn to be extremely professional, reliable, easy to work with, and always willing and able to answer any queries that we might have. Following an initial briefing, Glenn produced preliminary drawings within a quick time-frame that delivered in terms of meeting our needs, wants and budget. Glenn listened carefully to what we wanted and worked hard to ensure that this was feasible. Glenn dealt with all of our queries promptly, efficiently and, equally importantly, courteously. All meetings took place at our house and at times that were convenient for us. Things happened when they were supposed to happen, which made the whole process and, incidentally, our lives much easier! All in all, we are very happy with the service supplied by Glenn and have no hesitation in recommending GT Building Design to future clients."
Caroline and Philip Maguire, Belfast ⭐⭐⭐⭐⭐ 5 Stars
“Thank you for doing the job so promptly and efficiently.”
Julie McDonald, Comber. ⭐⭐⭐⭐⭐ 5 Stars
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