Rooflight glass replacement across Greater London

Guide prices in Greater London

Small sealed unit

£445 – £795including VAT at 20%

Misted or cracked unit up to about 1 m² measured, made and refitted

Medium sealed unit

£795 – £1,295including VAT at 20%

Units up to about 2 m², or toughened and laminated

Large or specialist

£1,295 – £2,395including VAT at 20%

Triple glazed, solar-control or heavy units needing lifting gear

Guide ranges. The first visit is charged and priced before booking; any new glass is priced in writing before work starts. Scaffold, access towers or a crane are priced separately if the job needs them, and building control fees, where a job needs them, are shown as their own line.

Towns we list in Greater London

Greater London is part of our normal coverage in England. Fitting teams travel out to the property, so a town-centre terrace and a house down a farm track are treated alike, as long as a fitter can get the unit to the roof safely. Dates are offered according to fitter availability, and the cost of travel is already in your written quote.

Included in the work

New unit set on packers, then beaded, capped or bonded as designed
New glazing tapes, gaskets or sealant fitted to suit the frame
Old glass taken out safely and removed from site
Condition of the frame — We look at the frame closely before committing to new glass.
Can the glass come out? — We check whether your rooflight has removable glass or a bonded unit before booking a fitting visit.

Rules that apply in England

England's rules in short: permitted development usually covers a rooflight on a house roof provided it doesn't stick out more than 0.15 m or rise above the ridge, though a listed building always needs consent and some streets have Article 4 directions. Building regulations apply to new openings, and replacements go through building control; as we are not registered with a competent person scheme, we use a building notice and show the fee on the quote. The energy limit for rooflights in existing homes is 2.2 W/m²K, and the 2026 Approved Document L, in force from 24 March 2027, keeps that figure.

Common questions in Greater London

Is new glass or a new rooflight better value?

If the frame, gaskets and drainage are sound, new glass is usually the cheaper fix. If the frame is cracked, distorted or leaking at the kerb, a full replacement is better value. After the measuring visit we price both so you can compare.

How long does new rooflight glass take?

The new sealed unit is made to the measured size, so there is a gap between the measuring visit and the fitting visit while it is produced. We give you the expected timing when we price the glass, and book the fitting once it has arrived.

Is the measuring visit charged?

Yes. The first visit measures the existing glass and checks the frame, and it is charged. We confirm that price before you book. The fitting of the new glass is then priced in writing, so you see the full cost before anything is ordered.

Rooflight glass replacement in Greater London