Large roof lanterns in Nailsea
Looking for a large roof lantern in Nailsea? We price it to your kerb size, confirm the fixed price in writing and deliver to BS48 and the surrounding postcodes, ready for your builder to fit or for us to quote fitting.
Price a large roof lantern for Nailsea
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Nailsea homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
In midsummer the noon sun stands about 62.0° high over Nailsea, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Lengths from about three to six metres
- Solar-control glass recommended
- Delivered as a frame kit with glass
Delivery and fitting in Nailsea
We confirm the delivery cost and date for BS48 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Nailsea can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to BS48 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Nailsea
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 × 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 |
| 3000 × 4000 mm | 12.00 m² | £5,695–£6,595£4,746 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 Nailsea
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 Nailsea 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 Nailsea
Does a large lantern need structural calculations?
The roof structure around it usually does. Your engineer or building control body will want the lantern's weight and the opening size.
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 Nailsea?
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 BS48.
Who checks building regulations for a lantern in Nailsea?
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.