Opening roof lanterns in New Malden
Whether your New Malden extension is still on paper or the roof is already on, we can price an opening roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price an opening roof lantern for New Malden
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Opening roof lanterns for New Malden homes
Electric opening vents to let warm air out at the highest point of the room.
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.
- One or two vents depending on size
- Plan the power supply early
- Switch or remote control
Delivery and fitting in New Malden
We confirm the delivery cost and date for KT3 on your quote. Lanterns arrive palletised, with the glass packed separately.
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.
Opening roof lantern prices for New Malden
Guide prices for common opening roof lantern sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1500 × 2000 mm | 3.00 m² | £2,690–£2,990£2,242 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £2,990–£3,390£2,492 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,890–£4,390£3,242 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,790–£5,490£3,992 ex VAT from | Configure |
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 for New Malden
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.
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 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
Can a vent be added later?
Usually not to an existing fixed lantern. Decide before ordering.
Can I have a manual opening vent?
Manual vents are rare on lanterns because they are out of reach. Electric operation is standard.
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.
Do I need planning permission for a roof lantern in New Malden?
Often not, but it depends on the roof, the property and whether it is listed or in a conservation area. Check with your district, borough or unitary council before ordering.