architectureHouse Extension Dublin
Stunning contemporary Dublin home with a modern glass extension at sunset

Award-Winning House Extensions in Dublin

Kitchen extensions, attic conversions and full home renovations across Dublin and Ireland. Free quotes. Fixed prices. Fully insured.

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Our House Extension Services in Dublin

Trusted house extension Dublin builders since 2010

House Extension Dublin has been delivering kitchen, attic and full home extensions across Dublin and Ireland for over fifteen years. From our Dublin 2 head office in Grand Canal Dock we design, project-manage and build every house extension with our own directly-employed team — no subcontracted hand-offs and no second-mobilisation surprises mid-project.

Whether you're researching home extensions Dublin pricing, looking for experienced extension builders Dublin homeowners trust, or comparing extension cost Dublin quotes against the market, we make the process easy: a free site survey, an architect-stamped design, and a single fixed-price contract that covers groundworks, structure, finishes and a 12-month workmanship guarantee.

Most house extensions Dublin homes need fall into one of three categories — a kitchen extension, an attic conversion or a whole-house renovation paired with an extension. Every variant we build is mapped into the closest of those three so you get the specialist Dublin team for the work, not a generalist crew. Read more on our services hub or check coverage for areas we serve.

Why Trust Us With Your Home?

Building excellence into every structural beam and finishing detail.

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Modern Design Expertise

We specialize in contemporary architectural aesthetics that complement traditional Irish homes.

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Fixed-Price Quotes

No hidden costs. Detailed, transparent pricing before any tools are lifted.

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Fully Insured & Certified

Comprehensive coverage and compliance with all Irish building regulations.

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15+ Years Across Dublin

Deep local knowledge of Dublin planning permissions and specific neighborhood requirements.

Recent Dublin Projects

Modern house extensions and contemporary house extensions across Dublin 2, Dublin 4, Dublin 6, Tallaght, Swords, Malahide and Blackrock. Every project is designed and managed in-house.

House extension project in Dublin 2
Dublin 2
House extension project in Dublin 4
Dublin 4
House extension project in Dublin 6
Dublin 6
House extension project in Tallaght
Tallaght
House extension project in Swords
Swords
House extension project in Malahide
Malahide
House extension project in Blackrock
Blackrock
House extension project in Drogheda
Drogheda

Our Process

01

Free Site Survey

We visit your Dublin home, take detailed measurements and discuss your vision.

02

Design & Quote

Architectural drawings, fixed-price quote and a clear timeline before any tools are lifted.

03

Build

Our in-house team builds with weekly progress updates and zero subcontracted surprises.

04

Handover

Final walk-through, snag list, certificates and a 12-month workmanship guarantee.

Frequently Asked Questions

Quick answers to the cost questions Dublin homeowners ask us most.

See all 25 FAQsarrow_forward
How much do extensions cost in Dublin?expand_more
A standard single-storey kitchen extension in Dublin typically ranges from EUR 2,400 to EUR 3,200 per square metre depending on finish level and groundworks. We give a fixed price after the free site survey - no surprises mid-build.
How much does a small extension cost in Ireland?expand_more
A small 15-20 sqm rear extension in Ireland generally costs between EUR 50,000 and EUR 75,000 fully fitted. Glass-roof or steel-frame designs sit at the higher end of that range.
How much for a kitchen extension in Ireland?expand_more
A typical 30-40 sqm kitchen extension in Ireland costs EUR 80,000 to EUR 130,000 turnkey, including kitchen units, flooring and decoration. Smaller side-return extensions start around EUR 55,000.
How much can I extend my house without planning permission in Ireland?expand_more
Under exempted development you can typically extend up to 40 sqm to the rear of a house in Ireland without planning permission - subject to height, boundary and existing-extension rules. We confirm exemption in writing for every project.
How much rear extension is allowed?expand_more
Most semi-detached and terraced houses can extend 40 sqm to the rear under exempted development, with a single-storey height cap of 4 metres (flat roof) or 5 metres (pitched). Two-storey rear extensions normally need full planning.

Visit Our Dublin 2 Office

Ready to Plan Your Dublin House Extension?

Book your free site survey today. We'll discuss your vision, assess feasibility, and provide a detailed timeline.