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For clients who value considered design, clear guidance, and a smooth approval process.
A Calm, Clear Process Designed Around You
Home projects can feel complex. My role is to make them clear, structured, and calm — so you always feel confident at every stage.
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Clear guidance from the first conversation
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Designs that improve space, light and flow
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Planning handled with care and attention
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Detailed drawings that help builders price accurately
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A personal, responsive service from start to finish
Architectural Services for Homeowners
Trusted by homeowners who value quality design and lasting results. GT Building Design manages every Planning and Building Control submission, ensuring a smooth, well‑coordinated approval process from first concept to completion.
Recent Projects
A selection of recent extensions, loft conversions, garage conversions, and internal alterations completed across North Down, Belfast, and nearby towns — each designed with clarity, care, and a calm, structured process from first ideas to approval.
Why Homeowners Choose GT Building Design
Residential expertise
Thoughtful, well‑planned layouts that make Planning and Building Control approvals smooth and straightforward.
Trusted domestic design specialist for extensions, conversions, and home alterations — with decades of proven results.
40+ years experience
Chartered Architectural Technologist
Professional, compliant drawings prepared to the standards councils expect — with the reassurance of chartered expertise.
Transparent pricing with no VAT and no hidden extras — just honest, straightforward value.
Clear fee proposals
A calm, structured process
Steady guidance from first sketch to approval, with practical advice and clear communication at every stage.
Over 40 verified 5‑star Google reviews from homeowners across Northern Ireland.
What Clients Say
Albert
"Glenn recently completed the design and architectural work for me taking his detailed drawings right through the planning office process and 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 drawings are very detailed that in my case it enabled the planning office to grant the approval without changes. Great job Glenn."
Tommy
"Embarking on any building project can be a very daunting task…
From the outset Glenn impressed us with his knowledge, professional approach and enthusiasm for our project.
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 the 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."
Ross
“I got in touch with GT Building Design about the possibility of a kitchen extension…
Right from the first email, I knew Glenn was the right man for our project.
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.”
Awards & Recognition
Recognised for excellence in residential architecture throughout Northern Ireland:
Best Architectural Technologist Studio of the Year 2023
Build Awards
Most Trusted Residential Architecture Practice 2025
SME News
Best Residential Extensions & Conversions Architectural Practice in Northern Ireland 2024
Business Excellance
Your Home Extension & Design Process. Step by Step
A Clear, Structured Path From First Call to Securing Approvals
1. Introductory Call
A friendly conversation to understand your ideas and outline what’s realistically achievable.
2. Written Fee Proposal
A clear, stage‑by‑stage proposal with transparent pricing.
3. Measured Survey
A measured survey of your home to produce existing plans and elevations before design work begins.
4. Concept Design
Refined, practical design options that balance creativity, compliance and cost‑awareness, tailored to your wishes.
5. Planning Application
Preparation and submission of all drawings and documents, with all communication with Planning handled for you.
6. Building Control Application
Fully detailed, compliant technical drawings that give builders clear, reliable instructions.
About Glenn
I’m a Chartered Architectural Technologist, but more importantly, I’m someone who genuinely enjoys helping homeowners make sense of their ideas. Most people come to me with a mix of excitement and uncertainty — and that’s completely normal. My job is to keep things calm, clear, and manageable, guiding you through each step so you always know what’s happening and why.
If you’ve got a home project in mind, I’m here to help you shape it into something practical, well‑designed, and genuinely enjoyable to live in.
Architect or Technologist — What’s the Difference?
A quick, simple guide for homeowners.
Architects focus on concept design and overall aesthetics.
Chartered Architectural Technologists (CIAT) specialise in the technical and practical side of design — Planning, Building Control and ensuring a smooth, buildable delivery of residential projects.
GT Building Design is a CIAT Chartered Practice, providing a full range of architectural services for extensions, conversions and alterations across North Down, Belfast and nearby towns.