Derby

Bay Windows cost in Derby

Bay window pricing covers a three-light set (typically two side casements plus a fixed central pane) plus the structural head and cill. Cost per opening is roughly 2.5–3× a single casement.

Material	Glazing	Estimated price range
uPVC	Double	£1,400 – £3,500
uPVC	Triple	£2,100 – £4,900
Aluminium	Double	£2,500 – £6,150
Timber	Double	£3,350 – £9,800

Prices are estimates derived from verified Derby casement baseline data (source: Checkatrade (Apr 2025) + HomeOwners Alliance) with a bay windows-specific multiplier applied. Fully-fitted supply and install including disposal and FENSA/Certass certification.

Read the full bay windows cost guide for a national breakdown by material, glazing, and region.