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Greater London · EN5

Roof lantern replacement in Barnet

For roof lantern replacement in Barnet, the job is simple to describe: we replace lanterns that are beyond economic repair, checking the kerb and re-making the junction. Photos first, a guide price back, then a written fixed price.

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We carry out roof lantern replacement in Barnet and across the EN5 area. We're repair-first, but some lanterns are past it: distorted frames, rot through the main bars, or most of the glass failed.

Two installers lowering a new aluminium roof lantern onto a prepared timber kerb

Signs you need roof lantern replacement

  • Rotten timber throughout
  • Repeated leaks after previous repairs
  • Single-glazed or very poor thermal performance

Why it happens

Structural damage

Impact or movement distorts the frame.

Rot

Timber lanterns left unmaintained.

Covering Barnet and nearby

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.

Barnet is around 11 miles from Westminster, and both are within our Greater London coverage.

We also cover nearby Potters Bar (3 miles), Borehamwood (3 miles), Finchley (3 miles).

How much should it cost?

Guide price, supplied and fitted£1,995–£4,995 ex VAT£2,394–£5,994 inc VAT

Most roof lantern replacement jobs come in between £1,995 and £4,995 ex VAT (£2,394–£5,994 including 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?

Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Roof lantern replacement in Barnet: questions

Can you repair a lantern someone else installed in Barnet?

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.

Which places near Barnet do you cover?

As well as Barnet, we cover nearby Potters Bar, Borehamwood, Finchley, Muswell Hill and the rest of Greater London.

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.

Can the new lantern use the existing opening?

Usually, if the kerb is sound and the size suits a standard or made-to-measure lantern.

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