House Extensions Belfast

Need more living space but don't want to move? A house extension could be the perfect solution. Diamond Property Maintenance NI designs and builds house extensions across Belfast and Northern Ireland, helping families create the space they need without the stress and expense of moving.

We build all types of extensions: single storey rear extensions, double storey extensions, side return extensions, wrap-around extensions, and garage conversions. Each project is tailored to your requirements, lifestyle, and budget.

Our service covers the complete process from initial concept to final handover: design consultation and planning, architectural drawings (through our partner architects), planning applications if required, building regulations approval, complete construction, and all finishing work including electrics, plumbing, plastering, and decorating.

With over 30 years of experience, we understand the challenges of building in Northern Ireland - from planning requirements to weather conditions. We manage projects efficiently, minimise disruption, and deliver quality results that add value to your home.