Do I Need Planning Permission for a Velux Window?
- Daniel Cunliffe
- Jul 17
- 1 min read
In most cases, no - you don’t need planning permission to install a Velux window in the UK, as long as it falls under “permitted development.”
That means:
It doesn’t sit higher than the roof’s highest point
It doesn’t project more than 150mm from the roof plane
It uses obscured glazing and is non-opening if facing a boundary
Do I need building regulations approval?
Yes - even if planning permission isn’t needed, your Velux window must meet building regs. That covers insulation, structural changes, and proper installation. When you choose a professional roofer (like us), we handle all of that as standard.
Does it matter if it’s a flat or pitched roof?
The rules are similar for both, but flat roof skylights often require more consideration around upstands, drainage, and thermal performance - so professional installation is even more important.
Can I fit a Velux window myself?
You could try - but if the work isn’t signed off properly, you could end up with condensation, structural issues, or problems when selling the house. That’s why most homeowners stick with fully insured, local installers.
Need advice for your home?
We fit Velux roof windows across Accrington, Blackburn, and the wider Lancashire area - with full compliance and no corner-cutting.
