What makes our approach different?
Over 30 years’ construction experience
Delivering trusted building solutions backed by decades of industry knowledge and hands-on expertise.
Federation of Master Builders member
Recognised for maintaining high standards of workmanship, professionalism, and customer service.
Comprehensive insurance throughout project
Fully insured from start to finish, providing complete peace of mind at every stage of your project.
Tailor-made garden rooms for every lifestyle
CDM Ireland Limited creates fully insulated, custom-designed garden rooms that turn your outdoor space in Belfast into a practical extension of your home. Whether you’re dreaming of a garden office, a private gym, or a dedicated salon room, our team ensures each structure is built for year-round use and lasting comfort. Every project is managed from the initial design through to completion, removing hassle and uncertainty. With more than three decades of hands-on experience, we use advanced materials for exceptional durability and style. You benefit from extra living and working space without the disruption of a traditional extension.
Built for performance, comfort, and the future
Our garden rooms and extensions incorporate Passivhaus principles for high thermal efficiency, ensuring your space stays warm in winter and cool in summer. We use advanced ‘breathable’ wall systems and high-performance insulation, setting our builds apart from standard timber outbuildings. As LEED-certified builders, CDM Ireland Limited prioritise sustainable construction and ethically sourced materials at every stage. Each design is entirely bespoke, tailored to your style, requirements, and the unique shape of your garden rooms in Belfast.
What you gain from our Belfast garden rooms
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Year-round, climate-controlled comfort.
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High-performance glazing and airtight construction.
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Fully tailored internal layouts for any use.
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Durable, permanent structures, not just summer houses.
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Energy-efficient features for lower heating bills.
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Federation of Master Builders compliance.
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Full insurance cover for peace of mind.
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Complete project management, from planning to handover.
Elevate your Belfast home with lasting value
Adding a garden room or extension not only creates extra space but also boosts your property’s appeal and value. Our permanent, insulated builds allow you to work, exercise, or relax in comfort all year. With bespoke designs, your new space can be shaped for hobbies, business, or family needs. Eco-friendly construction methods mean your investment also benefits the environment. Every project is protected by comprehensive insurance for total reassurance.