Casement window prices

The honest answer to “how much do casement windows cost?” is: it depends. Casement window prices vary with size, frame material, glazing, hardware and how many windows you replace at once. This page sets out the typical ranges and the factors behind them, so you can read a quote with confidence and spot when one is unusually high or suspiciously low. For an exact figure you will always need a home survey.

What drives the price

Six things move the number more than anything else:

• Size — a large living-room casement uses more material and glass than a small landing window.
• Material — uPVC is the most affordable; aluminium and timber cost more. See uPVC vs aluminium casement.
• Glazing — double glazing is standard; triple glazing, argon fill and warm-edge spacers add cost and performance.
• Hardware — locking to PAS 24, premium handles and easy-clean hinges all count. See the hardware guide.
• Finish — woodgrain foils, dual colours and non-white frames typically carry a small premium.
• Access and fitting — upper floors, scaffolding and building-regulations-compliant installation through a FENSA or CERTASS fitter.

Typical price ranges

As a broad guide only, a standard white uPVC casement supplied and fitted commonly sits in the low-to-mid hundreds of pounds per window, with larger units, coloured finishes, aluminium frames and enhanced glazing moving up from there. A full-house replacement is usually quoted as a package rather than per window, which can change the per-unit maths. Treat any figure you read online — including ours — as a starting point, not a promise. We do not advertise fixed prices or savings claims; the accurate number comes from a survey of your actual windows.

How to compare quotes fairly

The biggest mistake is comparing quotes that are not like-for-like. One installer may have priced argon-filled double glazing with PAS 24 locking, while another quoted a basic unit — the cheaper number is not really cheaper. Always compare the same material, glazing and hardware, check that fitting and building-regulations registration are included, and read what the guarantee actually covers. Our guide to how to compare window quotes properly breaks down exactly what to line up side by side. Getting two or three quotes is the single best way to understand a fair price.

Funding and payment

Many installers offer finance or spread-payment options, and funding and contribution options may be available subject to eligibility and a home survey. Ask each installer to set out any deposit, deposit-protection arrangement and payment schedule clearly in writing. Avoid any pressure to sign on the day — a genuine quote will still be there tomorrow.