Replacement roof lanterns in Penzance
Buy replacement roof lanterns for homes in Penzance and across Cornwall. 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 TR18 address.
Price a replacement roof lantern for Penzance
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for Penzance homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
Winter daylight in Penzance lasts about 8h 03m, against 16h 23m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Often a one-day swap on a sound kerb
- Energy standards for replacements explained
- Reuse the kerb if sound and to size
Delivery and fitting in Penzance
Delivery to TR18 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Penzance before quoting.
Delivery to TR18 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for Penzance
Guide prices for common replacement roof lantern sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | 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 for Penzance
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 Penzance 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 Penzance
Will a new lantern be warmer?
A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.
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 Penzance?
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 TR18.
Can you fit a roof lantern in Penzance?
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.