Cost data for journalists
Costwise is an independent UK home-improvement cost database covering 56 of the most-searched jobs. Journalists and writers are welcome to use these figures, with a credit and a link to https://costwiseuk.co.uk.
Every figure is a from, typical and up-to range built from real UK job pricing, reviewed and dated, and only changed when the numbers actually move. We never invent statistics. Need a specific job's range, a regional breakdown or a quick expert quote for a piece? Email [email protected] and we will turn it around fast.
Quick stats you can quote
All UK, reviewed June 2026. Please cite as Costwise with a link to https://costwiseuk.co.uk.
- The most expensive common UK home improvement is a loft conversion, typically around £45,000 (£22,000 to £75,000).
- A new boiler typically costs £3,000 supplied and fitted (£1,800 to £4,500).
- Solar panels cost around £7,000 installed (£5,000 to £12,000).
- An air source heat pump is typically £11,000 before the £7,500 government grant.
- A single-storey house extension runs £2,000 to £3,200 per square metre, before the kitchen or bathroom fit-out.
- A new kitchen is typically £12,000 supplied and fitted (£5,000 to £40,000).
- Double glazing is around £550 per window (£400 to £900).
- London homeowners typically pay around 30 percent more than the UK average for the same work, and up to 41 percent more than the cheapest regions.
The full data
For the complete picture, see the UK Home Improvement Cost Report (most and least expensive jobs, cost per square metre, regional differences) and the full cost index of every job. The underlying figures are also available as a downloadable CSV.
Using our figures
You are welcome to quote any Costwise figure in articles, reports or broadcast. We just ask for a credit to Costwise and, online, a link to https://costwiseuk.co.uk. For a tailored data pull, a regional angle or an on-the-record quote, email [email protected].