Opening roof lanterns in Harpenden
Looking for an opening roof lantern in Harpenden? We price it to your kerb size, confirm the fixed price in writing and deliver to AL5 and the surrounding postcodes, ready for your builder to fit or for us to quote fitting.
Price an opening roof lantern for Harpenden
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Opening roof lanterns for Harpenden homes
Electric opening vents to let warm air out at the highest point of the room.
On the shortest day Harpenden gets about 7h 46m of daylight, with the sun only 14.7° above the horizon at noon. Light from the sky overhead is the brightest available in winter, which is exactly what a roof lantern collects.
- Plan the power supply early
- Rain sensor closes it automatically
- One or two vents depending on size
Delivery and fitting in Harpenden
We confirm the delivery cost and date for AL5 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 AL5 and quote a fixed price after seeing photos or surveying.
Delivery to AL5 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Opening roof lantern prices for Harpenden
Typical guide prices for opening roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 2000 mm | 2.00 m² | £2,190–£2,490£1,825 ex VAT from | 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 |
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 Harpenden
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 Harpenden 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 Harpenden
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.
Can I have a manual opening vent?
Manual vents are rare on lanterns because they are out of reach. Electric operation is standard.
How quickly can I get a roof lantern in Harpenden?
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 AL5.
Who checks building regulations for a lantern in Harpenden?
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.