Large roof lanterns in Blackburn
Planning an extension in Blackburn? A large roof lantern is one of the quickest ways to bring daylight into the middle of the room. Use the configurator for a guide price, then send your kerb size for a fixed quote and delivery date.
Price a large roof lantern for Blackburn
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Blackburn homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
At 53.75°N, Blackburn sees roughly 7h 25m of daylight in late December and 17h 05m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Lengths from about three to six metres
- Delivered as a frame kit with glass
- Intermediate rafters carry the larger glass
Delivery and fitting in Blackburn
Delivery to BB1 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
If you would like us to fit it, we will check fitting cover for BB1 and quote a fixed price after seeing photos or surveying.
Delivery to BB1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Blackburn
Typical guide prices for large roof lanterns, supply only and including VAT:
| 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 Blackburn
In England, building regulations energy guidance sets a limiting U-value of 2.2 W/m²K for new and replacement rooflights in existing homes, measured horizontally.
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 Blackburn 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 Blackburn
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.
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.
Who checks building regulations for a lantern in Blackburn?
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.
Is it worth having solar-control glass in Blackburn?
With the midsummer sun about 59.7° high at noon, roof glass in Blackburn gets strong summer sun. Solar control is recommended for large or south-facing lanterns.