England · Large

Large roof lanterns in Greater London

Buy large roof lanterns for homes and building projects anywhere in Greater London. See guide prices below, then get a fixed written quote for your size, glass and colours.

AreaGreater London

NationEngland

Towns listed80

Guide price from£2,595

Configure and price Call 0800 088 6248

Get a price in Greater London

Send your postcode and kerb size for a fixed written quote.

Choosing large roof lanterns in Greater London

Lanterns of three metres and more for open-plan extensions, with intermediate rafters.

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.

Intermediate rafters carry the larger glass
Delivered as a frame kit with glass
Approximate weight given with your quote
Solar-control glass recommended

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.

Large roof lantern prices

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

Large roof lantern prices
Kerb size	Roof area	Guide price	Configure
1500 × 3000 mm	4.50 m²	£2,595–£2,995£2,162 ex VAT from	Configure
2000 × 3000 mm	6.00 m²	£3,195–£3,695£2,662 ex VAT from	Configure
2000 × 4000 mm	8.00 m²	£4,095–£4,795£3,412 ex VAT from	Configure
2500 × 4000 mm	10.00 m²	£4,895–£5,695£4,079 ex VAT from	Configure
3000 × 4000 mm	12.00 m²	£5,695–£6,595£4,746 ex VAT from	Configure

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

Planning and building regulations in Greater London

England's Approved Document L caps the U-value of new or replacement rooflights in existing homes at 2.2 W/m²K, calculated with the glass horizontal.

On a permitted development extension the lantern counts towards the extension's height; on an existing roof, a rooflight projecting more than 150 mm may need planning permission.

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

Large roof lanterns in Greater London: questions

Does a large lantern need structural calculations?

The roof structure around it usually does. Your engineer or building control body will want the lantern's weight and the opening size.

What is the biggest roof lantern you can supply?

It depends on the range. Some go to about 6 m by 4 m with intermediate rafters. Send us your kerb size and we will confirm what can be made.

How is a large lantern delivered?

On pallets, usually with the frame and glass packed separately. The heaviest single item is normally a glass unit, which needs two or more people to lift safely.

Who checks building regulations for a lantern in Greater London?

Your local authority building control team or a registered building control approver. For a lantern in a new extension it forms part of the extension's approval; replacements in existing homes have their own rules.