Opening roof lanterns in Greater London

Choosing opening roof lanterns in Greater London

Electric opening vents to let warm air out at the highest point of the room.

Across Greater London, the shortest day brings around 7h 50m of daylight and the midsummer sun reaches about 61.9° at noon. A lantern collects light from the bright overhead sky all year, and the right glass keeps the long summer days comfortable.

• Rain sensor closes it automatically
• One or two vents depending on size
• Switch or remote control
• Electric vents at the room's highest point

Delivery and fitting in Greater London

Delivery to mainland addresses here is quoted for your postcode and confirmed in writing before you order.

Fitting can be quoted where we have cover; send your postcode and photos of the roof and kerb and we will confirm before quoting.

Opening roof lantern prices

Typical guide prices for opening roof lanterns, supply only and including VAT:

Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour, including one electric vent. Your fixed price is confirmed in writing on your quote before you order.

Planning and building regulations in Greater London

In England, building regulations energy guidance sets a limiting U-value of 2.2 W/m²K for new and replacement rooflights in existing homes, measured horizontally.

Planning-wise, a lantern on a new extension is judged as part of that extension, while one added to an existing roof can fall outside permitted development if it stands more than 150 mm proud.

Building regulations are checked by your local authority building control team or a registered building control approver. Replacing a rooflight in an existing home is building work. Installers registered with a competent person scheme can self-certify; otherwise building control must be involved.

Sources: Approved Document L, GOV.UK · Planning Portal

Opening roof lanterns in Greater London: questions