Rooflight installation cost depends on more than the glass size. Product type, glass build-up, access, lifting, delivery, existing-roof removal, frame support, site readiness and location all affect the final quotation.
Product and glass costs
As a guide confirmed in October 2026, a good-quality flat rooflight up to 3 m² is around £850 per m² excluding VAT (£1,020 per m² including 20% VAT), with heat-soak-tested toughened outer glass and an appropriately specified heat-treated laminated inner pane. The final glass build-up and price depend on the project.
Typical installation labour is £800–£1,200 excluding VAT (£960–£1,440 including 20% VAT). Confirm delivery, offloading and lifting separately in the quotation; these figures are not an all-inclusive installed price.
Circular, ridge, eaves, modular and walk-on rooflights require different frames, processing and engineering. Heat-treated laminated inner glass is included in our standard overhead rooflight specification. Structural SGP build-ups, additional glass plies, solar-control choices, triple glazing and unusual shapes can change the quotation.
Very large panes can also require specialist transport, additional installers, lifting equipment or a crane.
Site and installation costs
The prepared upstand must be ready, accessible and within tolerance. Delays, return visits or changes to the opening can add labour and hire costs.
London access, parking, congestion restrictions, scaffolding, towers, roof protection and internal finishes should be identified early so quotations can be compared on the same basis.
Project checklist
Guide prices are indicative, not a fixed quotation for a bespoke installation. A written quotation should define product, delivery, access, lifting, installation and exclusions.
Bespoke rooflight specification, project coordination and installation across London and the UK.