“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
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.
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.
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.
60-Year Structural Warranty
Peace of mind comes standard. Every steel-frame house extension we build in Dublin is backed by a comprehensive 60-year structural guarantee.

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
House Extension Projects


