Do I Need Planning Permission for Velux (Roof) Windows?
Usually NO
In most cases, NO — installing roof windows (including Velux-style) in the rear of the roof is usually permitted development.
Keep reading for the full rules.
Roof windows — whether Velux branded or any other type — are generally permitted development under Class C of the GPDO 2015. You can usually install a roof window without planning permission, provided it does not project too far beyond the roof plane and is not on the principal elevation in a conservation area.
Permitted Development Rules by Region
Permitted Development Rules — England
- ✓Roof windows are permitted development under Class C of the GPDO 2015.
- ✓They must not protrude more than 150mm above the plane of the existing roof.
- ✓They must not be installed on the front (principal elevation) if the property is in a conservation area.
- ✓They must not be higher than the highest part of the existing roof.
- ✓Side-facing roof windows in a loft conversion must be obscure glazed and non-opening below 1.7m.
Size & Position Limits (England)
| Requirement | Limit / Rule |
|---|---|
| Standard position (rear) | PD — no planning permission needed |
| Conservation areas (front elevation) | Planning permission required |
| Max projection | 150mm above roof plane |
| Height | Must not exceed existing ridge height |
| Side windows (loft conversion) | Obscure glazed, non-opening below 1.7m |
When Do You Need Planning Permission?
Even if your project is usually permitted development, planning permission is required in these circumstances:
- ✗You want to install front-facing roof windows in a conservation area.
- ✗The windows would project more than 150mm above the roof plane.
- ✗Your property is a listed building.
What Happens If You Build Without Permission?
Front-facing roof windows in conservation areas installed without permission can be subject to enforcement action requiring removal or replacement.
Enforcement notices: Your council can issue an enforcement notice requiring you to stop the work, remove it, or restore the land to its original condition. You have a right of appeal against an enforcement notice.
Retrospective applications: If you have already carried out work that required planning permission, you can submit a retrospective planning application. If approved, this regularises the work. If refused, you may be required to remove it.
Time limits: For dwelling houses, the council generally has 4 years to take enforcement action for most types of work. For breaches of planning conditions, the time limit is 10 years. There is no time limit for listed building enforcement.