How much does a house extension cost in Ireland?

A single-storey extension costs €1,500–€2,500 per m² including VAT. A 25m² kitchen extension typically costs €40,000–€65,000 fully fitted.

Do I need planning permission for an extension in Ireland?

Extensions under 40m² at the rear of a house are generally exempt from planning. Your builder or engineer will advise on your specific situation.

How do I find a good builder in Ireland?

Always get 3 quotes, check references, verify public liability insurance, and use a written contract. CIF registered builders have signed up to industry standards.

How long does a home extension take in Ireland?

A typical single-storey extension takes 10–16 weeks from start to finish. Planning permission (if required) adds 8–12 weeks to the timeline.

Builders Ireland 2026 — Compare Building & Renovation Quotes

What does a Builder do?

Extensions and renovations

New builds

Kitchen and bathroom fit-outs

Attic conversions

Energy upgrades

Insurance-backed work

Builder Costs in Ireland (2026)

Typical 2026 building costs in Ireland (labour + materials):

Item	Typical cost
House extension (per sqm)	€2,200 – €3,200
Full renovation (per sqm)	€1,200 – €2,000
Attic conversion	€25,000 – €45,000
Kitchen renovation	€15,000 – €35,000

Indicative 2026 ranges — exact pricing varies by county and property. Compare free quotes to see your actual costs.

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Builder Costs in Ireland (2026)

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Find a Builder in Ireland

What does a Builder do?

Builder Costs in Ireland (2026)

Find Builders by County

Frequently Asked Questions

Get Free Quotes

Regulation Body