Replacement roof lanterns in Seaham
Whether your Seaham extension is still on paper or the roof is already on, we can price a replacement roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a replacement roof lantern for Seaham
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for Seaham homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
On the shortest day Seaham gets about 7h 12m of daylight, with the sun only 11.7° above the horizon at noon. Light from the sky overhead is the brightest available in winter, which is exactly what a roof lantern collects.
- Supply only or a fitting quote
- Often a one-day swap on a sound kerb
- Warmer, quieter, brighter
Delivery and fitting in Seaham
Your quote includes delivery to Seaham 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 Seaham before quoting.
Delivery to SR7 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for Seaham
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 |
| 1500 × 2500 mm | 3.75 m² | £2,295–£2,695£1,912 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 Seaham
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 in Seaham 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 Seaham
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.
Will a new lantern be warmer?
A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.
Can you fit a roof lantern in Seaham?
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.
Is it worth having solar-control glass in Seaham?
With the midsummer sun about 58.6° high at noon, roof glass in Seaham gets strong summer sun. Solar control is recommended for large or south-facing lanterns.