Replacement roof lanterns in Harpenden
Looking for a replacement 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 a replacement roof lantern for Harpenden
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for Harpenden homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
At 51.82°N, Harpenden sees roughly 7h 46m of daylight in late December and 16h 42m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Supply only or a fitting quote
- Warmer, quieter, brighter
- Often a one-day swap on a sound kerb
Delivery and fitting in Harpenden
Your quote includes delivery to Harpenden at a confirmed price, usually to the kerbside or driveway on pallets.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Harpenden before quoting.
Delivery to AL5 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for Harpenden
Typical guide prices for replacement roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,295–£1,495£1,079 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £2,295–£2,695£1,912 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 Harpenden
England's Approved Document L caps the U-value of new or replacement rooflights in existing homes at 2.2 W/m²K, calculated with the glass horizontal.
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
My old lantern leaks. Is it the lantern or the roof?
Often the roof or kerb detailing. A survey or close inspection will tell. If the lantern is the problem, replacing it is usually better value than repairing old polycarbonate.
How long does replacement take on site?
For a like-for-like swap on a sound kerb, often a day. Kerb or roof repairs add time.
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.
Is it worth having solar-control glass in Harpenden?
With the midsummer sun about 61.6° high at noon, roof glass in Harpenden gets strong summer sun. Solar control is recommended for large or south-facing lanterns.