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Velux & Skylight Costs 2026

Adding natural light can transform a dark loft or extension. From classic Velux roof windows to grand architectural lanterns, understanding the 2026 installation costs is key to a successful project.

Modern Skylight Installation Guide

Component Pricing (2026)

Standard Velux (Supply & Fit)£900 – £1,450
Velux Integra (Solar/Electric)£1,400 – £2,100
Roof Lantern (uPVC 1.5x1m)£1,800 – £2,800
Aluminium Lantern (2x1.5m)£2,800 – £4,500

*Labor typically accounts for £350–£600 of the total cost per unit. Prices include standard flashing kits.

Installation Complexity

Fitting a window isn't just about the glass. It involves structural alterations and weatherproofing.

Standard Labor (per unit)£350 – £550
Structural Mod (Rafter Cut)+ £150 – £300
Internal Finishing/Plastering£100 – £200

The "Cold Bridge" Warning

Poorly installed skylights are the #1 cause of condensation in lofts. If the installer doesn't properly insulate the 'reveal' (the internal tunnel), you will get cold spots that attract moisture. Always ensure your installer uses the official Velux BDX insulation collar to prevent 'cold bridging'.

Energy Efficient

Modern triple-glazed Velux windows offer U-values as low as 0.8, exceeding 2026 Building Regs.

10-Year Guarantee

All Velux roof windows come with a 10-year manufacturer's warranty as standard.

Property Value

Adding natural light is one of the highest-ROI improvements you can make to your home.

Velux & Skylight FAQ

Get Your Skylight Quote

Use our 2026 calculator to see how adding Velux windows will impact your total roofing project cost.