How we approach skylight replacement in Clapham
We handle skylight replacement across Greater London, including Clapham. In short: replacing tired domes and failed glass with a modern rooflight. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Think of skylight replacement for older extensions due a modern rooflight.
Clapham is around 5 km from central London, and we survey and fit throughout that part of Greater London, including the SW4 district.
Specification options
- Dome to flat glass upgrade
- Like-for-like size replacement
- Fixed to electric opening
- Roof window replacement in pitched roofs
- Misted glass unit replacement only
- Option to add opening and rain sensor
- Usually done in a day
What to check first
- Upstand and roof condition decide the scope
- Enlarging the opening changes the structure and may need approval
Planning, building control and Clapham
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. Listed buildings need listed building consent, flats have no householder permitted development rights, and an Article 4 direction can remove the rights in some conservation areas.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Our planning guide covers each nation in more detail.
What does skylight replacement cost in Clapham?
Prices below are shown including and excluding VAT. In Clapham, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Replacement with upstand rebuild and opening unit | £2,995 – £4,795 | £2,495 – £3,995 |
| Dome to flat glass upgrade Typical | £1,915 – £2,995 | £1,595 – £2,495 |
| Like-for-like glass rooflight | £1,555 – £2,155 | £1,295 – £1,795 |
The process, step by step
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Neighbouring towns
Related work in Clapham
Questions about skylight replacement in Clapham
Can I go bigger when replacing?
Possibly. Enlarging the opening means trimming joists, so we check the structure first.
Will it mess up my ceiling?
We protect the room and make good the reveal. Minor decoration may be needed afterwards.
Do I need building regulations approval to replace a rooflight?
Replacements in existing homes generally need to meet current thermal standards and may need notification or approval. We advise on the route for your job.
Is the survey in Clapham free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
How do I book a survey in Clapham?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
