Index

Sitemap

Every page on the site in one place. Start with the calculators if you want a price, or the guides if you want to understand what you are paying for.

Calculators

Costs

Guides

Compare

Regions

Tools

Reference

Company

Last updated 4 June 2026. Written by Tom Bradley, a FENSA-registered installer with over 20 years fitting windows. Read our methodology.

These figures are independent 2026 estimates, not a formal quote. Always get at least three written quotes before you commit. Grant rules change often, so confirm eligibility on GOV.UK and check your installer is registered with FENSA.