Modular Extensions Ireland: Add Space to Your Home in Weeks, Not Months

Modular Extensions in Ireland

A modular extension is a factory-built addition to an existing home — an extra bedroom, a home office, a living room or a sunroom — manufactured off-site and joined to your house in days. For Irish homeowners who need more space but dread the disruption of a traditional build, a modular extension is one of the fastest, cleanest routes to extra room.

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What Is a Modular Extension?

A modular extension is built in a factory as a complete, insulated, finished section, then delivered and connected to your existing home. The on-site work — foundations, the connection, the finishing — takes days to weeks rather than months.

A modular extension can be:

• An extra bedroom with en-suite
• A home office or studio
• A living room or sunroom
• A ground-floor extension for a growing family
• A first-floor extension over an existing structure

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Why Choose a Modular Extension?

• Speed — weeks vs. months for a traditional extension
• Less disruption — most of the work happens off-site
• Cleaner — far less dust, noise and mess at your home
• Weather-independent — the factory build isn't delayed by Irish weather
• Energy-efficient — insulated to modern standards, A-rated BER achievable
• Predictable cost — a fixed-price contract, not an open-ended estimate

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Planning Permission for a Modular Extension

A modular extension needs planning permission in the same way a traditional extension does — unless it falls within the exempted development limits for extensions to a house (typically 40m² at the rear, subject to conditions). The fact that it's modular doesn't change the planning position.

Full planning detail: Planning Permission Ireland

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Modular Extension Costs

Indicative 2026 pricing:

• Single-storey rear extension (20–30m²): €40,000 – €75,000
• Larger extension (40–60m²): €75,000 – €130,000
• Two-storey / first-floor extension: €100,000 – €180,000+

Per square metre, expect roughly €2,000 – €2,800 per m² turnkey.

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Talk to Us About a Modular Extension

At New Chapter Homes, we design and build modular extensions across Ireland — fast, clean and energy-efficient. Book a free consultation to talk through adding space to your home.