Large roof lanterns in Seaham
From a small lantern over a hallway to a long one above a kitchen island, we quote large roof lanterns for Seaham homes to the exact kerb size, with glass and colour choices set out clearly before you commit.
Price a large roof lantern for Seaham
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Seaham homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
Winter daylight in Seaham lasts about 7h 12m, against 17h 20m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Delivered as a frame kit with glass
- Intermediate rafters carry the larger glass
- Fitting can be quoted on request
Delivery and fitting in Seaham
Delivery to SR7 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
Fitting in Seaham can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to SR7 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Seaham
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 Seaham
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 Seaham 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 Seaham
What is the biggest roof lantern you can supply?
It depends on the range. Some go to about 6 m by 4 m with intermediate rafters. Send us your kerb size and we will confirm what can be made.
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.
Is it worth having solar-control glass in Seaham?
With the midsummer sun about 58.6° high at noon, roof glass in Seaham gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
Do I need planning permission for a roof lantern in Seaham?
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.