Rectangular roof lanterns in Darwen
Order rectangular roof lanterns for delivery to Darwen and nearby Blackburn and Accrington. Every lantern is checked against your measurements before it is ordered, and the price on your quote is fixed for the specification shown; any extra work is agreed with you first.
Price a rectangular roof lantern for Darwen
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Rectangular roof lanterns for Darwen homes
The classic double-hipped lantern: a ridge, four sloping sides and the most size choice.
Winter daylight in Darwen lasts about 7h 26m, against 17h 05m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Standard sizes or made to your kerb
- The most size options of any lantern shape
- Suits kitchen-diners and rear extensions
Delivery and fitting in Darwen
We confirm the delivery cost and date for BB3 on your quote. Lanterns arrive palletised, with the glass packed separately.
If you would like us to fit it, we will check fitting cover for BB3 and quote a fixed price after seeing photos or surveying.
Delivery to BB3 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Rectangular roof lantern prices for Darwen
What rectangular roof lanterns cost in common sizes (guide, inc VAT, supply only):
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,295–£1,495£1,079 ex VAT from | Configure |
| 1000 × 2000 mm | 2.00 m² | £1,495–£1,795£1,246 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 Darwen
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.
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 Darwen 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 Darwen
Does a longer lantern need extra support?
Long lanterns use intermediate rafters inside the lantern itself. The roof structure around the opening must be designed to carry the lantern's weight; your builder or engineer sizes the trimmers.
Which way should the ridge run?
The ridge runs along the longer side. On a square opening there is no ridge and the lantern becomes a pyramid.
Is it worth having solar-control glass in Darwen?
With the midsummer sun about 59.7° high at noon, roof glass in Darwen gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
Can you fit a roof lantern in Darwen?
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.