Large roof lanterns in Penzance
Whether your Penzance extension is still on paper or the roof is already on, we can price a large roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a large roof lantern for Penzance
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Penzance homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
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.
- Fitting can be quoted on request
- Approximate weight given with your quote
- Intermediate rafters carry the larger glass
Delivery and fitting in Penzance
We confirm the delivery cost and date for TR18 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Penzance can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to TR18 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Penzance
Guide prices for common large roof lantern sizes, including 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 × 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 |
| 2500 × 4000 mm | 10.00 m² | £4,895–£5,695£4,079 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.
Planning-wise, a lantern on a new extension is judged as part of that extension, while one added to an existing roof can fall outside permitted development if it stands more than 150 mm proud.
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
How is a large lantern delivered?
On pallets, usually with the frame and glass packed separately. The heaviest single item is normally a glass unit, which needs two or more people to lift safely.
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.
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.
Do you deliver roof lanterns to Penzance?
Yes. Delivery to Penzance (TR18) is quoted for your exact postcode and confirmed in writing on your quote, together with the lead time.