Large roof lanterns in New Malden
Looking for a large roof lantern in New Malden? We price it to your kerb size, confirm the fixed price in writing and deliver to KT3 and the surrounding postcodes, ready for your builder to fit or for us to quote fitting.
Price a large roof lantern for New Malden
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for New Malden homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
Winter daylight in New Malden lasts about 7h 51m, against 16h 37m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Approximate weight given with your quote
- Intermediate rafters carry the larger glass
- Delivered as a frame kit with glass
Delivery and fitting in New Malden
Delivery to KT3 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
Fitting in New Malden can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to KT3 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for New Malden
What large roof lanterns cost in common sizes (guide, inc VAT, supply only):
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1500 × 3000 mm | 4.50 m² | £2,595–£2,995£2,162 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 for New Malden
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.
Lanterns on permitted development extensions are part of the extension's height limits. Adding one to an existing roof is different: over 150 mm of projection can mean a planning application.
Building regulations in New Malden 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
Questions from New Malden
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.
Do large lanterns overheat a room?
A large area of south-facing glass can make a room warm on sunny days. Solar-control glass, an opening vent and good background ventilation all help. Our guide on overheating explains the options.
Who checks building regulations for a lantern in New Malden?
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.
Can you fit a roof lantern in New Malden?
We can quote for fitting where we have cover. Send your postcode and photos of the roof and kerb, and we will confirm before quoting.