Large roof lanterns in Portsmouth
From a small lantern over a hallway to a long one above a kitchen island, we quote large roof lanterns for Portsmouth homes to the exact kerb size, with glass and colour choices set out clearly before you commit.
Price a large roof lantern for Portsmouth
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Portsmouth homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
At 50.8°N, Portsmouth sees roughly 7h 57m of daylight in late December and 16h 31m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Intermediate rafters carry the larger glass
- Fitting can be quoted on request
- Approximate weight given with your quote
Delivery and fitting in Portsmouth
Your quote includes delivery to Portsmouth 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 Portsmouth before quoting.
Delivery to PO1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Portsmouth
Typical guide prices for large roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1500 × 3000 mm | 4.50 m² | £2,595–£2,995£2,162 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 |
| 2500 × 4000 mm | 10.00 m² | £4,895–£5,695£4,079 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 Portsmouth
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.
On a permitted development extension the lantern counts towards the extension's height; on an existing roof, a rooflight projecting more than 150 mm may need planning permission.
Building regulations in Portsmouth 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 Portsmouth
What is the biggest roof lantern you can supply?
It depends on the range. Some go to about 6 m by 4 m with intermediate rafters. Send us your kerb size and we will confirm what can be made.
Do large lanterns overheat a room?
A large area of south-facing glass can make a room warm on sunny days. Solar-control glass, an opening vent and good background ventilation all help. Our guide on overheating explains the options.
Who checks building regulations for a lantern in Portsmouth?
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.
How quickly can I get a roof lantern in Portsmouth?
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 PO1.