UK Home Improvement Cost Data 2026 (Costwise)

Independent guide prices for 80+ of the most common UK home-improvement jobs, from a new boiler and a loft conversion to driveways, extensions and double glazing, with low, typical and high figures reviewed in 2026, plus regional cost multipliers for 12 UK cities. Compiled and maintained by Costwise (https://costwiseuk.co.uk). This is a mirror of the canonical dataset published on Zenodo: https://doi.org/10.5281/zenodo.21159944. Free to reuse with attribution to Costwise (https://costwiseuk.co.uk).