Terms of Use

What this site is

doubleglazingcostcalculator.co.uk provides independent, general-purpose cost information about double glazing in the UK, including interactive calculators and editorial guides. By using the site you accept these terms.

Estimates, not quotes

Every figure on this site, including calculator results, is a guide estimate built from published 2026 cost data. It is not a quote, a survey, a valuation or an offer. Real prices vary with your property, specification, access and installer. Always obtain written quotes from FENSA-registered installers before making any decision, and treat our figures as a sense-check against them.

No professional advice

Nothing here is financial, legal or building-regulations advice. Grant rules and building regulations change; where they matter to you, confirm the current position on GOV.UK or with your local authority before relying on it.

Accuracy and liability

We work hard to keep figures sourced and current (see our methodology), but we cannot guarantee that every figure is accurate or complete at the moment you read it. To the fullest extent permitted by law, we accept no liability for loss arising from reliance on the information or tools on this site.

Benchmark prices and quotes

The benchmark prices on this site are compiled from published sources and do not change based on who quotes for your job. If you request a callback, we will share the details you give us with installers solely to arrange quotes for you; how that data is handled is set out in our privacy policy. Any contract for the supply or installation of windows is between you and the installer, not with this site.

Content and links

Content on this site is ours and may not be republished wholesale without permission; short quotations with a link are welcome. Links to external sites are provided in good faith; we are not responsible for their content.

These terms were last updated on 4 June 2026.