Replacement roof lanterns in St Albans
Whether your St Albans extension is still on paper or the roof is already on, we can price a replacement roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a replacement roof lantern for St Albans
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for St Albans homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
On the shortest day St Albans gets about 7h 47m 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.
- Supply only or a fitting quote
- Often a one-day swap on a sound kerb
- Energy standards for replacements explained
Delivery and fitting in St Albans
Your quote includes delivery to St Albans 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 St Albans before quoting.
Delivery to AL1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for St Albans
Guide prices for common replacement 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 |
| 1500 × 2500 mm | 3.75 m² | £2,295–£2,695£1,912 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 St Albans
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 St Albans 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 St Albans
Will a new lantern be warmer?
A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.
Can I replace polycarbonate panels with glass?
Usually not in the old frame: glass is much heavier than polycarbonate and the frame was not designed for it. Replacing the whole lantern is the safer route.
Is it worth having solar-control glass in St Albans?
With the midsummer sun about 61.7° high at noon, roof glass in St Albans gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
Do you deliver roof lanterns to St Albans?
Yes. Delivery to St Albans (AL1) is quoted for your exact postcode and confirmed in writing on your quote, together with the lead time.