Replacement roof lanterns in Carshalton
Buy replacement roof lanterns for homes in Carshalton and across Greater London. Choose a standard size or have one made to your kerb, see a guide price straight away, then get a fixed written quote with delivery to your SM5 address.
Price a replacement roof lantern for Carshalton
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for Carshalton homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
Winter daylight in Carshalton 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.
- Supply only or a fitting quote
- Energy standards for replacements explained
- Replace old polycarbonate with glass
Delivery and fitting in Carshalton
Your quote includes delivery to Carshalton at a confirmed price, usually to the kerbside or driveway on pallets.
Fitting in Carshalton can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to SM5 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for Carshalton
Guide prices for common replacement roof lantern sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 2000 mm | 2.00 m² | £1,495–£1,795£1,246 ex VAT from | Configure |
| 1500 × 2000 mm | 3.00 m² | £1,995–£2,295£1,662 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £2,295–£2,695£1,912 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,195–£3,695£2,662 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 Carshalton
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 in Carshalton 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 Carshalton
Can I replace polycarbonate panels with glass?
Usually not in the old frame: glass is much heavier than polycarbonate and the frame was not designed for it. Replacing the whole lantern is the safer route.
How long does replacement take on site?
For a like-for-like swap on a sound kerb, often a day. Kerb or roof repairs add time.
Do I need planning permission for a roof lantern in Carshalton?
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.
Is it worth having solar-control glass in Carshalton?
With the midsummer sun about 62.1° high at noon, roof glass in Carshalton gets strong summer sun. Solar control is recommended for large or south-facing lanterns.