Cost data for journalists

Costwise is an independent UK home-improvement cost database covering 150 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 contact@costwiseuk.co.uk 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 granny annexe, typically around £60,000 (£30,000 to £150,000).
• A new boiler typically costs £3,000 supplied and fitted (£1,800 to £4,800).
• Solar panels cost around £7,000 installed (£5,000 to £12,000).
• An air source heat pump is typically £13,000 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 postcode gap in cash: a typical loft conversion is about £58,500 in London against £41,500 in the North, Scotland and Wales, a difference of £17,000.

The full data

For a categorised, copy-and-paste set of citable figures see the UK home improvement cost statistics page. For the complete picture, see the UK Home Improvement Cost Report (most and least expensive jobs, cost per square metre, regional differences), the quote-variation study on where prices swing most, and the full cost index of every job. The underlying figures are also available as a downloadable CSV, and the dataset is published on Kaggle, Hugging Face, Figshare and Zenodo (DOI: 10.5281/zenodo.21159943), free to reuse under CC BY 4.0.

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 contact@costwiseuk.co.uk.

Who has used our figures

• Realtor.com August 2026 · quoted on what raising a thermostat saves on cooling costs
• Ideal Home August 2026 · quoted on air source heat pump costs against air conditioning
• Shed Blog June 2026 · cited for UK garden room guide prices
• The Korea Daily August 2026 · quoted on cutting summer electricity bills
• Cosy Home Blog July 2026 · cited for garden room costs

Each link goes to the article itself so you can see the context. None of these outlets has a commercial relationship with Costwise.