We're repair-first, but some lanterns are past it: distorted frames, rot through the main bars, or most of the glass failed. Send photos from Isleworth (TW7) and we'll tell you which it is — with the price agreed in writing before any work.

Is it time for roof lantern replacement?
- Several misted or cracked units
- Distorted or sagging frame
- Repeated leaks after previous repairs
What usually causes it?
Age
Older lanterns can't be brought up to modern performance with repairs alone.
Rot
Timber lanterns left unmaintained.
About Isleworth and the TW7 area
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
Across London, many lanterns sit on rear extensions with access only through the house, so we protect floors and plan the work to keep time indoors to a minimum. Parking and any permits are factored into the quote.
From Westminster to Isleworth is roughly 9 miles — all part of the Greater London area we cover.
Neighbouring places we cover include Hounslow (1 mile), Heston (2 miles), Richmond (2 miles).
Guide prices for roof lantern replacement in Isleworth
Typical range: £1,995–£4,995 ex VAT, which is £2,394–£5,994 with VAT, supplied and fitted. Towers or scaffold, where needed, are priced into the quote. Your fixed price is confirmed in writing before any work starts.
Do you need permission in England?
In England, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010, so we set out the route in writing first. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.
How does it work?
- Send photosWhatsApp or upload a few photos and tell us when it leaks.
- Guide priceWe reply with a guide price and whether a visit is needed.
- Fixed price in writingYou approve the price and the date before anything starts.
- Repair and testWe fix what's failed, water-test where it matters, and send photos.
Roof lantern replacement in Isleworth: questions
Do you cover Isleworth?
Yes. We cover Isleworth, including the TW7 postcode area, as part of Greater London. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Can you repair a lantern someone else installed in Isleworth?
Yes. We repair lanterns whoever fitted them. If yours is still under the installer's warranty, contact them first so you don't affect it.
How much does a replacement roof lantern cost?
Standard sizes typically £1,995–£4,995 ex VAT supplied and fitted; bespoke sizes and kerb rebuilds are priced on survey. You get the fixed price in writing first.
Will you tell me if repair is enough?
Yes. We'd rather do a repair that works than sell a lantern you don't need.
Other lantern repairs in Isleworth
- Upstand and kerb repairs in Isleworth
- Misted glass unit replacement in Isleworth
- Slipped glass panel repairs in Isleworth
- Aluminium roof lantern repairs in Isleworth
- Flat rooflight and skylight repairs in Isleworth
- Orangery lantern repairs in Isleworth
Roof lantern replacement near Isleworth
More about roof lantern replacement · All roof lantern repairs in Isleworth