Skylight replacement for Carshalton: the essentials
For Carshalton homes and buildings we offer skylight replacement: replacing tired domes and failed glass with a modern rooflight. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Many London roofs are reached only through the house or over neighbouring property, so lifting heavy glass is planned at survey rather than on the day. Think of skylight replacement for yellowed domes, misted glass and leaking roof windows.
Carshalton is around 16 km from central London, and we survey and fit throughout that part of Greater London, including the SM5 district.
What you can choose
- Upstand rebuild and insulation
- Like-for-like size replacement
- Fixed to electric opening
- Misted glass unit replacement only
- Dome to flat glass upgrade
- Clearer view and more light
- Option to add opening and rain sensor
Things we check at survey
- Old glass and domes are disposed of responsibly
- Upstand and roof condition decide the scope
Planning and building rules for Carshalton
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. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
Read the planning permission guide before you commit to a design.
Skylight replacement prices in Carshalton
Guide prices for skylight replacement in Carshalton are the same as anywhere we work — what changes the price is the job: access, structure, scaffold and finishing.
| 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
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Carshalton address.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Neighbouring towns
Other services in Carshalton
Questions about skylight replacement in Carshalton
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.
Can I go bigger when replacing?
Possibly. Enlarging the opening means trimming joists, so we check the structure first.
Can you replace only the misted glass?
Sometimes, if the frame is sound and the maker supplies replacement units. Often a complete new rooflight costs little more and performs better.
How do I book a survey in Carshalton?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Is the survey in Carshalton free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
