What is the average price guide for building in London?

In London, the average price for building projects such as house extensions, loft conversions, and garage conversions can vary significantly depending on the complexity and size of the project. For a typical single-storey house extension, you can expect costs to range from £1,500 to £2,500 per square metre, bringing an average total of around £20,000 to £40,000 for a standard 15m² extension.

For a loft conversion, prices generally range from £30,000 to £60,000. This includes the necessary structural work and finishing. If you're considering a garage conversion, it usually costs between £10,000 and £30,000, depending on the existing structure and desired finishes.

It's important to ensure your builders are properly certified, with qualifications such as NICEIC for electrical work and Gas Safe for any plumbing or heating requirements. These certifications ensure that the work is performed to a high standard, which is crucial in a city like London where regulations are strict.

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