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What is the average price guide for building in Belfast?

United KingdomAsked 2026-04-1867 views1 answers45 total votes

What is the average price guide for building in Belfast?

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Helen CrossBuilding Specialist · 18 yrs
2026-03-19

In Belfast, the average price guide for building projects such as house extensions, loft conversions, and garage conversions varies significantly based on the scope of work and materials used. For a house extension, you can expect to pay around £1,200 to £1,800 per square metre, making a typical 20 square metre extension cost between £24,000 to £36,000. Loft conversions generally range from £30,000 to £50,000 depending on the complexity and whether it includes a dormer or en-suite. Meanwhile, a garage conversion might set you back approximately £10,000 to £20,000, depending on the existing structure and finish you desire. It's crucial to hire contractors who are registered with appropriate certifications like the NICEIC for electrical work or Gas Safe for gas-related installations to ensure compliance and safety. Prices may also vary based on the specific needs of your project in Belfast.

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