Rectangular roof lanterns in Beckenham
Whether your Beckenham extension is still on paper or the roof is already on, we can price a rectangular roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a rectangular roof lantern for Beckenham
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Rectangular roof lanterns for Beckenham homes
The classic double-hipped lantern: a ridge, four sloping sides and the most size choice.
At 51.41°N, Beckenham sees roughly 7h 50m of daylight in late December and 16h 37m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Ridge along the long axis, four glazed slopes
- The most size options of any lantern shape
- Stock anthracite, black or white, or any RAL
Delivery and fitting in Beckenham
Delivery to BR3 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Beckenham before quoting.
Delivery to BR3 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Rectangular roof lantern prices for Beckenham
Guide prices for common rectangular roof lantern sizes, including 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 |
| 1500 × 2000 mm | 3.00 m² | £1,995–£2,295£1,662 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 Beckenham
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 Beckenham 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 Beckenham
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.
How quickly can I get a roof lantern in Beckenham?
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 BR3.
Do I need planning permission for a roof lantern in Beckenham?
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.