Opening roof lanterns in Welwyn Garden City
Planning an extension in Welwyn Garden City? An opening 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 an opening roof lantern for Welwyn Garden City
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Opening roof lanterns for Welwyn Garden City homes
Electric opening vents to let warm air out at the highest point of the room.
In midsummer the noon sun stands about 61.6° high over Welwyn Garden City, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Electric vents at the room's highest point
- One or two vents depending on size
- Plan the power supply early
Delivery and fitting in Welwyn Garden City
Delivery to AL8 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
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.
Opening roof lantern prices for Welwyn Garden City
Typical guide prices for opening roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1500 × 2000 mm | 3.00 m² | £2,690–£2,990£2,242 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £2,990–£3,390£2,492 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,890–£4,390£3,242 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,790–£5,490£3,992 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour, including one electric vent. 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
What happens if it rains while the vent is open?
With a rain sensor the vent closes automatically. Without one it stays where you left it, so a sensor is worth having.
Does an opening vent let insects in?
When open, yes, as with any window. Some ranges offer fly screens.
Can you fit a roof lantern in Welwyn Garden City?
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.
Who checks building regulations for a lantern in Welwyn Garden City?
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.