The seven variables that move a window quote up or down, and how to compare two quotes fairly.
Most window quotes look like a single number, which makes them almost impossible to compare. In reality a replacement window price is built from a handful of separate decisions — and once you can see those decisions, two quotes that looked identical usually turn out to be very different products.
This guide breaks the price down the way an installer builds it up, so you can ask better questions before you sign anything. We do not publish a fixed price list because window pricing genuinely depends on your openings, but we will always show you the itemised breakdown behind our figure.
Almost every difference between two window quotes comes down to one of these:
The two most common exclusions in a low headline price are making good internally and the removal of the old frames. If one quote includes both and another does not, the gap is not really a price gap at all.
The second common difference is glass specification. A window that meets minimum building regulations and a window specified for a noisy road or a north-facing room are not the same product, even though both are described as 'A-rated double glazing'.
Ask every installer for the same four lines: frame system and colour, glass specification, number of openers per window, and exactly what is included in the fitting. With those on paper, comparison takes five minutes.
We price on that basis as standard, and our beat-any-like-for-like-quote promise only works when the comparison is genuinely like for like — which is why we ask for the written quote rather than a verbal figure.
Send us your existing written quote and we'll break it down line by line, then price the same specification against it.
Usually yes. Survey, delivery and fitting are far more efficient in a single visit than in several, so a whole-house job normally costs less per window than replacing two or three at a time.
Yes. A bay needs corner posts, structural support for the load above and more careful sealing, so it takes longer to fit and uses more components.
We can give an indicative figure from measurements and photos, but the fixed price comes after the survey — that's the point at which access, sills and lintels are confirmed.