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Rear home extension in Belfast featuring large glazed doors opening onto a landscaped patio.

Helping Homeowners Create

Better Homes

Chartered Architectural Technologist specialising in extensions, conversions and internal alterations across Northern Ireland.

40+ Years Experience • Chartered Practice • 40+ Five-Star Reviews

Recent Projects

A selection of extensions, conversions and alterations across Northern Ireland.

Modern rear extension in Belfast designed by GT Building Design, featuring full‑height glazing opening onto a landscaped garden.
Contemporary single‑storey extension in Belfast by GT Building Design, with full‑width glazing and tiled patio.
Modern kitchen‑dining extension in Belfast by GT Building Design, featuring a dark table, 8 dark chairs, and floor‑to‑ceiling glass doors opening to a landscaped garden

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Why Homeowners Choose GT Building Design

Residential design expertise developed over four decades.

40+ Years Experience

Professional guidance and compliant drawings prepared to recognised industry standards.

Chartered Architectural Technologist

Clear Fee Proposals

Clear scope and transparent pricing before work begins.

Guidance from initial ideas through to approved drawings.

Planning & Building Control Expertise

Trusted by Homeowners Across Northern Ireland

Modern single‑storey home extension with patio and glazed doors by GT Building Design, Donaghadee

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Albert

"Glenn's drawings sailed through Planning and Building Control due to his extensive knowledge and experience."

Contemporary two‑storey house with steps and landscaped entrance by GT Building Design, Donaghadee

⭐⭐⭐⭐⭐

Tommy

"From the moment I met Glenn, I felt comfortable. His experience and attention to detail made the entire process straightforward, resulting in planning approval without changes."

Architectural drawing showing proposed kitchen extension plans by GT Building Design, Donaghadee

⭐⭐⭐⭐⭐

Ross

"Glenn designed us the ideal home and guided us through every stage with confidence. What could have been stressful became an enjoyable experience."

40+ Verified 5-Star Google Reviews

GT Building Design top rated by homeowners in Northern Ireland badge.

A Simple, Structured Design Process

A Clear, Structured Path From First Call to Securing Approvals

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1. Initial Consultation

Discuss your ideas and explore what's possible.

2. Fee Proposal

Clear scope and transparent pricing.

3. Measured Survey

Accurate drawings of your existing home.

4. Design Proposals

Thoughtful design tailored to your home.

5. Planning Application

Preparation and submission of all required drawings.

6. Building Control Application 

Detailed technical drawings ready for approval and construction.

About Glenn

Helping homeowners navigate extensions, conversions and home improvements with confidence.

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I'm a Chartered Architectural Technologist with over 40 years' experience helping homeowners transform their homes.

 

Most people only undertake a building project once or twice in their lives. My role is to make the process straightforward, helping you understand the options available and guiding you from initial ideas through Planning and Building Control approvals.

 

Every project receives personal attention, practical advice and drawings prepared with care and precision.

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Thinking About Improving Your Home?

From initial ideas through to Planning and Building Control approvals, you'll receive practical advice, thoughtful design and personal guidance throughout the process.

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