Replacement roof lanterns in Cornwall
Across Cornwall, replacement roof lanterns are quoted to the external kerb size, with delivery confirmed for your postcode and fitting available on request.
Get a price in Cornwall
Send your postcode and kerb size for a fixed written quote.
Choosing replacement roof lanterns in Cornwall
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
Across Cornwall, the shortest day brings around 8h 01m of daylight and the midsummer sun reaches about 63.1° at noon. A lantern collects light from the bright overhead sky all year, and the right glass keeps the long summer days comfortable.
- Reuse the kerb if sound and to size
- Warmer, quieter, brighter
- Supply only or a fitting quote
- Energy standards for replacements explained
Delivery and fitting in Cornwall
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.
Replacement roof lantern prices
Typical guide prices for replacement roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,295–£1,495£1,079 ex VAT from | 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 |
| 2000 × 4000 mm | 8.00 m² | £4,095–£4,795£3,412 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 Cornwall
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
Replacement roof lanterns in Cornwall: questions
Will a new lantern be warmer?
A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.
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.
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 quickly can I get a roof lantern in Cornwall?
Stock sizes are typically ready in 5–10 working days, made-to-measure in 3–4 weeks, plus delivery. Your quote gives the date for Cornwall.
Replacement roof lanterns by town in Cornwall
- Replacement roof lanterns in Bodmin
- Replacement roof lanterns in Camborne
- Replacement roof lanterns in Falmouth
- Replacement roof lanterns in Launceston
- Replacement roof lanterns in Liskeard
- Replacement roof lanterns in Newquay
- Replacement roof lanterns in Penzance
- Replacement roof lanterns in Redruth
- Replacement roof lanterns in Saltash
- Replacement roof lanterns in St Austell
- Replacement roof lanterns in Truro