England · Replacement

Replacement roof lanterns in Kent

Whether you are in Maidstone or elsewhere in Kent, the process is the same: configure your lantern, get a guide price, then a fixed quote and a delivery date.

AreaKent

NationEngland

Towns listed23

Guide price from£1,295

Configure and price Call 0800 088 6248

Get a price in Kent

Send your postcode and kerb size for a fixed written quote.

Choosing replacement roof lanterns in Kent

Swap a tired, leaking or polycarbonate lantern for modern double glazing.

Across Kent, the shortest day brings around 7h 52m of daylight and the midsummer sun reaches about 62.1° at noon. A lantern collects light from the bright overhead sky all year, and the right glass keeps the long summer days comfortable.

Energy standards for replacements explained
Reuse the kerb if sound and to size
Often a one-day swap on a sound kerb
Warmer, quieter, brighter

Delivery and fitting in Kent

Delivery to mainland addresses here is quoted for your postcode and confirmed in writing before you order.

Fitting can be quoted where we have cover; send your postcode and photos of the roof and kerb and we will confirm before quoting.

Replacement roof lantern prices

What replacement roof lanterns cost in common sizes (guide, inc VAT, supply only):

Replacement roof lantern prices
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
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

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 in Kent

England's Approved Document L caps the U-value of new or replacement rooflights in existing homes at 2.2 W/m²K, calculated with the glass horizontal.

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 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

Replacement roof lanterns in Kent: questions

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.

Will a new lantern be warmer?

A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.

How long does replacement take on site?

For a like-for-like swap on a sound kerb, often a day. Kerb or roof repairs add time.

Who checks building regulations for a lantern in Kent?

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.