Why we exist
Too many homeowners go into a double glazing purchase with no idea what a fair price looks like, and it costs them thousands. This site fixes that in two steps. First, the calculators and price tables give you an instant, realistic 2026 estimate so you know the going rate before anyone visits your home. Then, if you want firm prices, you can request a callback and we will send you real quotes to compare against that benchmark.
How the callback service works
The estimates on this site are free and always will be. If you request a callback, we will take a few details about your home and the windows you want, then send you genuine quotes so you can see how they stack up against the calculator figure. You stay in control: compare the quotes with our quote checker, and walk away from any of them. We will always tell you when a quote is above the going rate, because the benchmark prices on this site are published for everyone to see.
How we check our prices
We are an aggregator and reviewer of published cost data, not a proprietary survey. For every figure we cross-check at least two of Checkatrade, the FMB and GreenMatch, alongside installer guides such as ExpertSure and StayWarm, and we use a stated consensus range rather than a single cherry-picked number. Where sources disagree we show the spread. The full process, including what we do not claim, is set out on our methodology page.
Who reviews the work
Every page is written by Tom Bradley, a FENSA-registered installer with over 20 years fitting windows. He has seen from the inside what a job really costs and how national firms mark it up, so he checks every figure on this site against the day-rate reality of the work and cross-references it with the published 2026 cost guides. The benchmark prices are published openly for everyone, so any quote we send you can be held to the same numbers you can see on the site.
What you can hold us to
If a figure on this site does not trace to a named 2026 source, it should not be here, and you are welcome to challenge it. We update the prices as new cost guides are published, and every article carries the date it was last reviewed. We will always tell you to get at least three written quotes and to check your installer is registered with FENSA before you commit.