Square roof lanterns in St Helens
Planning an extension in St Helens? A square 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 a square roof lantern for St Helens
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Square roof lanterns for St Helens homes
Four triangular panes meeting at a point: a pyramid lantern for square openings.
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.
- Strong central focal point from below
- No ridge, a neat apex cap instead
- Ideal over a table, island or hallway
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.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in St Helens before quoting.
Delivery to WA10 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Square roof lantern prices for St Helens
Guide prices for common square roof lantern sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1000 mm | 1.00 m² | £1,095–£1,295£912 ex VAT from | Configure |
| 1200 × 1200 mm | 1.44 m² | £1,295–£1,495£1,079 ex VAT from | Configure |
| 1500 × 1500 mm | 2.25 m² | £1,595–£1,895£1,329 ex VAT from | Configure |
| 2000 × 2000 mm | 4.00 m² | £2,395–£2,795£1,996 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.
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 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
What is the largest square lantern?
Ranges differ. Many go to around 3 m square, with extra hip bars on larger sizes. Tell us your kerb size and we will confirm which ranges can make it.
Can I have an opening vent in a pyramid lantern?
Some ranges can fit a vent in one of the triangular panes, others cannot. We will tell you on the quote whether your chosen range allows it.
Is it worth having solar-control glass in St Helens?
With the midsummer sun about 60.0° high at noon, roof glass in St Helens gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
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.