uPVC window styles explained

Before you can compare quotes sensibly, it helps to know which uPVC window style you actually want. The style dictates how a window looks from the street, how it opens, how easy it is to clean, and — importantly — how much it costs. This guide runs through every popular uPVC style in the UK, what suits which kind of home, and roughly what each one costs supplied and fitted in white.

Casement windows

The casement is the workhorse of British windows: a sash hinged at the side or top that swings outward on a friction stay. It is simple, weathertight, easy to operate and the most affordable style to replace — typically £350 to £650 per window fitted. Casements suit almost every property type, from new-builds to Victorian terraces. If this is your likely choice, our dedicated uPVC casement windows guide goes into detail on options and pricing.

Sash windows

Vertical sliding sash windows recreate the traditional Georgian and Victorian look, with two sashes that slide past each other. Modern uPVC versions use spring balances instead of the old cords and weights, tilt in for easy cleaning, and add discreet locks. They cost more than casements — usually £600 to £1,150 per window — because of the mechanism and the joinery detail. See our uPVC sash windows guide for the full picture.

Tilt and turn windows

Tilt and turn windows do two jobs from one handle: tilt the top inward for secure ventilation, or turn the whole sash inward to open fully. Because they open inward they are ideal for flats and upper storeys where you cannot reach outside to clean, and they meet fire-escape requirements in many layouts. Expect roughly £450 to £800 per window.

Bay and bow windows

A bay projects outward in angled sections, while a bow curves in a gentle arc. Both add light and a sense of space, and are priced as a full assembly rather than a single unit — typically £1,100 to £2,500 depending on size and the number of panes. They are a defining feature of many semi-detached and Edwardian homes.

Flush casement windows

A flush casement sits level with the frame when closed, rather than overlapping it, giving a crisp, timber-look finish that appeals to owners of cottages and period homes. It carries a small premium over a standard casement, usually £450 to £750 per window.

French casement windows

French casements are a pair of side-hung sashes that meet in the middle with no fixed central mullion, so when both are open you get an uninterrupted view and a wide opening. They work well for wider openings and as a lighter alternative to a door. Budget around £500 to £900 per window.

Fixed and shaped windows

Not every window needs to open. Fixed panes are the cheapest option and are often combined with opening lights in a larger frame. Shaped windows — arched, triangular or circular — are made to measure and priced individually. These are usually specified alongside your main windows during a survey.

Matching style to price

As a rule, the more moving parts and the more complex the shape, the higher the cost. Once you have a style in mind, our uPVC window prices guide shows how the bands stack up and what else moves the final figure. Remember these are market ranges — the only accurate number comes from a measured survey.