Replacement roof lanterns in St Helens
Buy replacement roof lanterns for homes in St Helens and across Merseyside. Choose a standard size or have one made to your kerb, see a guide price straight away, then get a fixed written quote with delivery to your WA10 address.
Price a replacement roof lantern for St Helens
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for St Helens homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
Winter daylight in St Helens lasts about 7h 29m, against 17h 02m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Supply only or a fitting quote
- Energy standards for replacements explained
- Often a one-day swap on a sound kerb
Delivery and fitting in St Helens
We confirm the delivery cost and date for WA10 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 WA10 and quote a fixed price after seeing photos or surveying.
Delivery to WA10 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for St Helens
What replacement roof lanterns cost in common sizes (guide, inc 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 |
| 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 St Helens
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.
Planning-wise, a lantern on a new extension is judged as part of that extension, while one added to an existing roof can fall outside permitted development if it stands more than 150 mm proud.
Building regulations in St Helens 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 Helens
Will a new lantern be warmer?
A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.
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.
Do I need planning permission for a roof lantern in St Helens?
Often not, but it depends on the roof, the property and whether it is listed or in a conservation area. Check with your district, borough or unitary council before ordering.
Can you fit a roof lantern in St Helens?
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.