What are skylight repairs & leak fixes?
Across Greater London, our skylight repairs & leak fixes work covers leak tracing, resealing, actuator repairs and glass replacement. Survey first, fixed price second, fitting third.
Party walls are a fact of life in London terraces, and rooflights close to a shared wall need detailing that keeps the neighbour's side dry too. London homes often run deep from front to back, so the middle of the ground floor is the darkest space — exactly where an overhead rooflight earns its keep.
Towns in Greater London
Specification options in Greater London
- Upstand and membrane repairs
- Resealing and re-flashing
- Glass unit replacement
- Planned maintenance visits
- Actuator, motor and control repairs
- Storm and impact damage
- Honest repair-or-replace advice
Planning and building rules in England
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
Building Regulations Approved Document L sets a limiting U-value of 2.2 W/m²K for new or replacement rooflights in existing homes, measured in the horizontal plane; roof windows need 1.4 W/m²K or a Band B energy rating. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
What do skylight repairs & leak fixes cost in Greater London?
These are typical supply-and-fit ranges. For an address in Greater London, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Glass unit or actuator replacement | £595 – £1,555 | £495 – £1,295 |
| Upstand or membrane repair Typical | £355 – £955 | £295 – £795 |
| Diagnostic visit and reseal | £235 – £475 | £195 – £395 |
How the job runs
- Tell us about the roof. Send the postcode, rough sizes and a photo or two through the form, WhatsApp or the guide-price tool.
- Free survey. For new installations a surveyor measures the opening, checks the roof build-up and talks through glass and options.
- Fixed written quote. You get the product, the work and the price in writing. Nothing is ordered or paid for until you agree.
- Fitting and handover. We fit, seal and make good, then hand over product data, warranties and any certificate paperwork.
Repairs & leaks in nearby areas
Common questions
Do you repair roof windows too?
Yes — flashings, seals, hinges and glass on pitched roof windows.
Do you charge for repair visits?
Yes, repairs are charged. We give the price before the visit.
Why is my skylight leaking?
Common causes are a failed seal, a membrane that has split or lifted at the upstand, a low upstand, blocked drainage or condensation mistaken for a leak.
Can you fix a misted rooflight?
A misted unit means the glass seal has failed. The sealed unit, or the whole rooflight, needs replacing.
Will I need planning permission in Greater London?
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof.
