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Garden Room Extension

Hello and welcome to the homepage of GT Building Design

Celebrating 40 years of outstanding excellence in Architecture!

Work with Glenn enhancing your home and turn your dreams into reality.

GT Building Design is a distinguished Chartered Architectural Practice situated in the coastal town of Donaghadee, County Down. Established by Glenn in 2004, with 40 years experience in Architecture. Glenn is committed to working closely with homeowners, helping you to improve your living spaces through quality extensions and enhancements while adeptly managing the Design, Planning, and Building Control processes. 

From quality home extensions to creative loft conversions and alterations, Glenn's extensive expertise shines through. When you choose Glenn, you are partnering with one of Northern Ireland's most respected, reliable, and trusted professionals.

Glenn would welcome the opportunity to work closely with you on your project, and as a chartered professional, he can:

  • Help you achieve your aspirations and vision

  • Add value to your project with quality designs and sound construction detailing

  • Bring creativity to your project whilst keeping it on track

  • Guide and work with you during the design process

  • Obtain Planning and Building Control approvals

  • Give you peace of mind

Considering extending or converting your loft? Click here

Loft Coversion Advice: Click here

To work with Glenn

If you would like to collaborate with Glenn on your project, or simply require initial advice, click on the button below to reach out to Glenn.

  1. Introductory telephone call for advice, no obligation. 

  2. Written Fee Proposal outlining fees, stages and expenses. 

  3. Measured survey of your home.

  4. Preparation of existing drawings. 

  5. Prepare and agree Design Proposals based on your wish-list for approval by you.

  6. Planning Application. 

  7. Building Control Application. 

  8. Selecting the right builder for your project.

  9. Support on Site.

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Discover advice, tips and all the latest news. Never miss a blog by clicking here.

Google 5 Star Reviews

Allwyn Corrin

Within a tight time frame Glenn worked quickly and efficiently to draw up plans for a beautifully designed 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.

Best Residential Extensions & Conversions Architecture Company 2023 - Northern Ireland ​

GT Building Design / Glenn Thompson 

Best Residential Extensions & Conversions

Architecture Company - Northern Ireland

Best Architectural Technologist (Northern Ireland)

GT Building Design / Glenn Thompson

Best Architectural Technologist Northern Ireland

& Residential Architecture Studio of the Year 2024

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