RSM Construction Dublin
    Home Extension in Stillorgan — luxury renovation by Dublin's premium construction company
    South County Dublin · Ireland

    Home Extension in Stillorgan

    Designing and building light-filled extensions throughout Stillorgan

    Home Extension · Stillorgan

    Home Extension Specialists Working Across Stillorgan

    Home extensions are one of the most transformative projects we deliver in Stillorgan, where generous detached and semi-detached family homes on leafy avenues often have generous gardens but compact rear ground-floor layouts. Our team coordinates architects, structural engineers and our directly-employed trades under one contract, taking the project from initial design and planning advice through to foundations, envelope, glazing and a fully fitted-out interior. Every Stillorgan extension is built to current insulation and air-tight standards, integrates cleanly with the existing home and is delivered with a clear week-by-week programme.

    What's Included

    Our Home Extension Service in Stillorgan

    Rear, side and two-storey extension design and build
    Full structural and Building Regulations-compliant construction
    High-performance glazing, insulation and air-tight detailing
    Seamless integration with the existing home throughout

    Home Extension for Homes in Stillorgan

    A home extension involves foundations, walls and roof, connecting the new structure to the existing house, opening up internal walls, extending services and finishing the new space so it reads as part of the original home. RSM manages groundworks, structural work, building envelope, first and second fix, and finishes as one design-and-build project.

    Stillorgan homes often have rear gardens suited to single-storey kitchen-dining extensions or side extensions. The goal is usually more family living space with good daylight and garden access.

    For a full overview of the service, see our home extension service across Dublin, or read more about our renovation and construction work in Stillorgan.

    Planning a Home Extension Project in Stillorgan

    A good extension feels like it was always part of the house, which depends on how the new and existing structures meet.

    • Connection to the existing house: Openings into the original walls usually need steel or engineered beams and careful sequencing.
    • Natural light: Roof lights and glazing positions affect both daylight and how the space stays comfortable.
    • Structural works: Foundations, beams and roof structure are designed by an engineer to suit the site.
    • Insulation: Walls, floor and roof need to meet current thermal standards and avoid cold bridges at the junction.

    Consider whether a side extension or rear extension better suits the plot, the existing layout and access to the garden.

    Related Services in Stillorgan

    Projects often combine more than one type of work. Homeowners in Stillorgan also ask us about kitchen renovation in Stillorgan, attic conversion in Stillorgan and builders in Stillorgan.

    Why Choose RSM

    Why Homeowners in Stillorgan Choose Us for Home Extension

    Architect, structural engineer and trades coordinated in-house
    Single-contract delivery from concept to handover in Stillorgan
    Energy-efficient, Building Regulations-compliant builds
    FAQs

    Home Extension in Stillorgan — Frequently Asked Questions

    The questions homeowners in Stillorgan most often ask us about home extension.

    Some extensions in Stillorgan may be exempt from planning permission and others will need it. Exemptions generally depend on the size, height, position and the amount of garden remaining, and they do not apply in the same way to protected structures or homes in some designated areas. Because the rules depend on the specific property, we recommend confirming this with your architect or the local authority before design is finalised.

    A single-storey home extension usually takes a few months on site, from groundworks to finishing, while larger or two-storey extensions take longer. Weather, structural complexity and how much of the existing house is being altered all affect the programme. For Stillorgan projects we agree a phased programme after drawings and engineering are complete, so each stage is planned rather than improvised.

    Yes, two-storey extensions can be built on many Stillorgan homes, subject to planning, site space and structural design. A two-storey extension usually needs planning permission and careful attention to neighbouring light and privacy. Structurally, the new walls, floor and roof must tie into the existing house properly. We work from engineered drawings and coordinate each stage of the build with your design team.

    We work with architects and engineers to deliver extension design in Stillorgan, either alongside your own design team or by bringing in suitable professionals. Good design considers how the extension connects to the existing rooms, natural light, structure, insulation and planning constraints. Having the builder involved early helps make sure the design is practical to construct and the details are resolved before work begins.
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    Also Serving Nearby Areas

    We also deliver home extension in the neighbourhoods surrounding Stillorgan.

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    Back to Stillorgan All Home Extension Info

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