Do you need planning permission for a roof lantern?

When a roof lantern is permitted development and when it needs planning permission or listed building consent, across England, Wales, Scotland and Northern Ireland.

Often you do not, but it depends on where the lantern goes, what it sits on and where you live. The rules differ between the four UK nations, so treat this as a starting point and check with your council before ordering.

Lantern on a new extension

If the extension is built under householder permitted development, the lantern is part of the extension and counts towards its maximum height. In England, single-storey rear extensions have height limits, with lower eaves limits near boundaries. If the extension needs planning permission anyway, show the lantern on the drawings you submit.

Lantern on an existing flat roof

In England, permitted development for alterations to a house roof does not cover a rooflight that projects more than 150 mm above the plane of the roof. Most lanterns stand taller than that, so a lantern on an existing roof may need planning permission. Ask your council or use the Planning Portal guidance.

When will I definitely need consent?

• Listed buildings: listed building consent is needed for most external and many internal changes.
• Flats and maisonettes: householder permitted development rights do not apply.
• Conservation areas, national parks and other designated land: extra limits often apply.
• Article 4 directions or conditions on an earlier permission that remove permitted development rights.

Wales, Scotland and Northern Ireland

Each nation sets its own permitted development rules. The principles are similar, but the details differ. Check with your local planning authority: your county council in Wales, your council in Scotland or your district council in Northern Ireland.

A Lawful Development Certificate in England and Wales, or the equivalent route elsewhere, gives written confirmation that a project is lawful, which is useful when you come to sell.

Sources

• Planning Portal
• Planning permission, GOV.WALES
• Do I need planning permission?, mygov.scot
• Planning permission: when to apply, nidirect

Written by the Buy Roof Lanterns team. Last reviewed 19 October 2026. General guidance only; your designer, building control body or council confirms what applies to your project.