Large roof lanterns in Welwyn Garden City
Planning an extension in Welwyn Garden City? 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 Welwyn Garden City
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Welwyn Garden City homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
On the shortest day Welwyn Garden City gets about 7h 46m of daylight, with the sun only 14.8° above the horizon at noon. Light from the sky overhead is the brightest available in winter, which is exactly what a roof lantern collects.
- Approximate weight given with your quote
- Lengths from about three to six metres
- Solar-control glass recommended
Delivery and fitting in Welwyn Garden City
Your quote includes delivery to Welwyn Garden City at a confirmed price, usually to the kerbside or driveway on pallets.
Fitting in Welwyn Garden City can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to AL8 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Welwyn Garden City
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 × 3000 mm | 6.00 m² | £3,195–£3,695£2,662 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 Welwyn Garden City
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 Welwyn Garden City 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 Welwyn Garden City
How is a large lantern delivered?
On pallets, usually with the frame and glass packed separately. The heaviest single item is normally a glass unit, which needs two or more people to lift safely.
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 you deliver roof lanterns to Welwyn Garden City?
Yes. Delivery to Welwyn Garden City (AL8) is quoted for your exact postcode and confirmed in writing on your quote, together with the lead time.
Is it worth having solar-control glass in Welwyn Garden City?
With the midsummer sun about 61.6° high at noon, roof glass in Welwyn Garden City gets strong summer sun. Solar control is recommended for large or south-facing lanterns.