Swift Builders is a Dublin-focused house extension company specialising in high-quality home extensions, rear extensions, Core and Shell builds, Builder’s Finish projects and Design & Build solutions. Our in-house construction team works closely with structural engineering partners to provide a connected and straightforward building process from initial planning through to handover. We help homeowners create practical additional living space with clear project scopes, professional construction and flexible handover options. We also specialise in standalone granny flats and garden annexes, designed around privacy, accessibility and everyday family needs. Whether you are planning a rear extension, exploring house extension costs in Dublin, considering a Core and Shell or Builder’s Finish package, or looking for a complete design and build solution, Swift Builders provides a clear route from your initial idea to construction.