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What is the average price guide for building services in Chiswick?

United KingdomAsked 2026-04-1825 views1 answers87 total votes

What is the average price guide for building services in Chiswick?

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Helen CrossBuilding Specialist · 12 yrs
2026-03-19

In Chiswick, the average price guide for various building services can vary significantly based on the scope of work. For a house extension, you can expect costs between £1,500 and £2,500 per square metre. This can make a typical extension 20 square metres cost around £30,000 to £50,000.

For loft conversions, the costs typically range from £30,000 to £60,000, depending on the complexity and specifications. A simple dormer loft conversion is generally more affordable, while a mansard style can be pricier due to the structural work involved.

Garage conversions usually fall between £10,000 and £25,000, depending on whether you're simply converting the space or adding insulation and plumbing.

It’s essential to hire certified professionals, such as those registered with NICEIC for electrical work or Gas Safe for any gas installations, to ensure safety and compliance with building regulations.

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