Replacement window quote checklist

The most common reason two window quotes look wildly different is that they are not actually quoting the same thing — different glass, different frame colours, different amounts of making good, one including scaffolding and one not. This checklist helps you fix the scope before you gather prices, so the numbers you compare are genuinely like-for-like.

Before the surveyor arrives

Gather the basics so you can describe the job clearly:

• How many windows and roughly what size — and which rooms.
• The window types you are replacing — casement, sash, bay, or doors. Our quotes by window type hub helps you identify them.
• What has failed — misting, draughts, rot, broken locks — and whether you might only need the glass or the whole window.
• Your preferences — frame colour, energy rating, any acoustic or obscure glass.
• Access notes — upper floors, conservatories, awkward reveals.

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What every written quote should itemise

A quote you can trust spells out the scope. Check that yours includes each of these:

• Removal and disposal of the old units.
• Frame material, style and colour, inside and out.
• Glass specification and energy rating — and any toughened safety glass.
• Fitting, sealing and making good of plaster, sills and trims.
• Access equipment such as scaffolding, where needed.
• Guarantee and aftercare — length and what it covers.
• Registration under a recognised competent-person scheme for building-regulations compliance.

Accurate measuring underpins all of this, so it is worth reading how replacement windows are measured to know what a good survey looks like. To sanity-check whether replacing is even the right call, this guide on repair or replace — how to decide is a sensible companion.

Comparing quotes and installers

With the scope fixed, comparing prices is straightforward. Look beyond the headline figure to the guarantee, the glass rating and the installer’s track record. Our enquiries are fulfilled by Help 2 Buy Windows — the UK’s No.1 double glazing installer on Trustpilot, rated 4.9/5 “Excellent” from more than 12,000 reviews. It is always worth reading independent reviews before you choose. You can also get a fast quote direct, no showroom, or scan the current double glazing deals and prices to gauge the market.

A note on price

Prices vary widely by window type, size, glass and region, so treat any single figure as a starting point rather than a promise. Funding and contribution options may be available subject to eligibility and a home survey, and £0-upfront options may be available for those who qualify. The quote and home assessment are free and no-obligation — planning a bigger project? See full-house window replacement.