Sunderland

French Windows cost in Sunderland

French windows (outward-opening paired casements to floor level) cost around 50–70% more than a standard casement due to the larger glass area and threshold detail.

Material	Glazing	Estimated price range
uPVC	Double	£700 – £1,700
uPVC	Triple	£1,150 – £2,150
Aluminium	Double	£1,250 – £3,000
Timber	Double	£1,650 – £4,750

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