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

In Camden, the average cost for building services such as house extensions, loft conversions, and garage conversions in 2026 can vary significantly based on the scale and complexity of the project. For a house extension, homeowners can expect to pay roughly £1,500–£2,500 per square metre, leading to total costs between £20,000–£60,000 for an average-sized extension.

Loft conversions typically range from £30,000 to £50,000, depending on whether it’s a dormer or a more complex conversion. Garage conversions are also a popular option, costing between £10,000 and £25,000, contingent upon the interior finishes and insulation requirements.

It’s essential to hire professionals who hold relevant certifications, such as NICEIC for electrics and Gas Safe for any gas installation work. These certifications ensure that the work is carried out safely and to code.

For accurate pricing, getting multiple quotes from local builders is advisable. Looking for professionals in your area? Find vetted providers on TradeMatch.