“Our rear extension completely transformed how we live day-to-day. The open-plan kitchen and living area floods with light through the full-height glazing, and the build quality is outstanding. Modular House managed everything from planning to handover with zero fuss. We only wish we'd done it sooner.”
Steel Frame House Extensions in Dublin — Built to Last.Expert building team.
House Extensions
HOUSE EXTENSIONS DUBLIN
Dublin's Trusted House Extension Specialists
Whether you are envisioning a light-filled open-plan kitchen, a dedicated home office, or an expansive master suite, a house extension in Dublin is the smartest way to add space and value to your home — without the upheaval of moving.
At Modular House, we design and build house extensions across Dublin that respect your home’s original character while delivering contemporary open-plan living, industry best energy efficiency, and exceptional structural integrity.
BESPOKE HOUSE EXTENSIONSEvery home is unique.
Every home is unique.
Your extension should be too.
Every house extension is engineered to order using premium steel-frame construction, delivering unmatched durability, design flexibility, and industry best thermal performance.
QUALITY & TRUST
Built to the Highest Standard
Our commitment to architectural integrity means we sweat the details. From structural engineering to the final coat of paint, every house extension we deliver is built to last.
Fully Insulated Roof & Walls
Exceeding building regulations for thermal performance, reducing energy bills and maximizing comfort year-round.
Planning Compliance Guaranteed
We handle the red tape. Whether exempt development or requiring full planning permission, our team manages the process.
50-Year Structural Warranty
Peace of mind comes standard. Every steel-frame house extension we build in Dublin is backed by a comprehensive 50-year structural guarantee.
TRANSPARENT PRICINGCompetitive House Extension Pricing.
Competitive House Extension Pricing.
No Hidden Costs.
We believe in total transparency. A house extension is a significant investment, and you deserve clarity on every cost from day one.
Detailed Itemised Quotation
Every element, from groundworks to glazing, is clearly broken down.
Fixed-Price Contracts
Once the design is locked in, the price is fixed. No nasty surprises mid-build.
Milestone-Based Payments
Pay only as significant, verifiable stages of the build are completed.
Trusted by Homeowners Across Dublin
OUR WORK
House Extension Projects
Frequently Asked Questions
In Ireland, certain house extensions may qualify as exempted development under the Planning and Development Act. Generally, single-storey rear extensions up to 40 square metres are exempt, subject to conditions on height, boundary setbacks, and site coverage. Our Dublin-based team assesses your property and handles the full planning process if a formal application is required.
A typical Modular House extension in Dublin takes 6 to 10 weeks from groundbreaking to handover, depending on size and complexity. This includes 1 to 2 weeks of foundation and structural steelwork, followed by 4 to 8 weeks of envelope, services, and finishing. Our steel-frame system reduces on-site time compared to traditional block construction.
Our fixed-price quotation covers structural steelwork, foundations, insulation, external cladding, internal plastering, electrical first and second fix, plumbing, flooring, and all regulatory compliance documentation. Kitchen and bathroom fit-out is available as an add-on package. There are no hidden extras — every line item is disclosed before you sign.
A well-designed house extension in Dublin typically adds between 5% and 15% to the property value, depending on the size, quality of finish, and local market conditions. Extensions that add a bedroom, bathroom, or open-plan living kitchen tend to deliver the strongest returns. Our A-rated insulation and Building Energy Rating compliance further enhance resale appeal.
Yes. Our steel-frame construction method generates significantly less dust and noise than traditional block building, and the build programme is designed to minimise disruption to daily living. We maintain a clean and safe site throughout, and critical services (water, electricity) are only briefly interrupted during connection phases.
Steel-frame construction offers several advantages: faster build times (up to 30% quicker), superior thermal performance through continuous insulation without cold bridges, lighter foundations reducing ground disruption, and dimensional precision from factory-fabricated components. Steel does not rot, warp, or attract insects, and our frames carry a 10-year structural warranty.