Flat rooflights in Portsmouth
Planning an extension in Portsmouth? A flat rooflight 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 flat rooflight for Portsmouth
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Flat rooflights for Portsmouth homes
A single near-flat pane on an upstand: minimal, low and discreet.
Winter daylight in Portsmouth lasts about 7h 57m, against 16h 31m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Very low profile from outside
- Minimal, frameless-looking from inside
- Fixed or electric opening versions
Delivery and fitting in Portsmouth
We confirm the delivery cost and date for PO1 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Portsmouth can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to PO1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Flat rooflight prices for Portsmouth
Guide prices for common flat rooflight sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1000 mm | 1.00 m² | £595–£695£496 ex VAT from | Configure |
| 1200 × 1200 mm | 1.44 m² | £695–£845£579 ex VAT from | Configure |
| 1000 × 2000 mm | 2.00 m² | £845–£995£704 ex VAT from | Configure |
| 1500 × 1500 mm | 2.25 m² | £895–£1,095£746 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
For homes in England, a new or replacement rooflight should achieve a U-value of 2.2 W/m²K or better in the horizontal position, under Approved Document L.
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
Are flat rooflights cheaper than lanterns?
Usually, size for size. They use one glass unit and a simple frame.
Do flat rooflights leak?
They should not, provided they are installed on a properly flashed upstand with the right fall and the seals are maintained.
Is it worth having solar-control glass in Portsmouth?
With the midsummer sun about 62.6° high at noon, roof glass in Portsmouth gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
Do you deliver roof lanterns to Portsmouth?
Yes. Delivery to Portsmouth (PO1) is quoted for your exact postcode and confirmed in writing on your quote, together with the lead time.