How long does it take to install a single Velux window?

A standard installation into an existing roof typically takes **one day**. If a new opening needs to be cut or structural rafters moved, it may extend to two days, including interior finishing and plastering.

Should I choose Solar or Electric Velux windows?

Solar-powered windows (Velux Integra) are highly recommended because they don't require any wiring to your home's mains power, significantly reducing electrician costs. They also include rain sensors that automatically close the window if it starts to rain.

Do I need planning permission for a roof window?

In most cases, no. Under Permitted Development, roof windows are allowed as long as they don't project more than 150mm from the roof plane. However, if you live in a Conservation Area or a Listed Building, you will likely need consent.

Brighten Your Space

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

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

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