Skylight replacement for Isleworth: the essentials
Skylight replacement in Isleworth means replacing tired domes and failed glass with a modern rooflight. We cover the TW7 district and the rest of Greater London, with a survey before any price is fixed.
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. In Isleworth, as anywhere, skylight replacement is the usual choice for yellowed domes, misted glass and leaking roof windows.
From Isleworth to Hounslow, Richmond and Twickenham, the same survey-first process applies: measure, specify, fix the price, then fit.
Choices for your Isleworth project
- Upstand rebuild and insulation
- Dome to flat glass upgrade
- Misted glass unit replacement only
- Roof window replacement in pitched roofs
- Fixed to electric opening
- Usually done in a day
- Often reuses the existing opening
Before you order: points to check
- A replacement is a chance to meet current thermal standards
- Upstand and roof condition decide the scope
Planning and building rules for Isleworth
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line. 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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. 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.
Our planning guide covers each nation in more detail.
Guide prices for Isleworth
Prices below are shown including and excluding VAT. In Isleworth, 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 |
How the job runs
- 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.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Other services in Isleworth
Common questions
How long does a replacement take?
Usually a day for a standard rooflight on a sound upstand.
Will it mess up my ceiling?
We protect the room and make good the reveal. Minor decoration may be needed afterwards.
What do you do with the old unit?
We remove it from site and recycle what can be recycled.
Do you offer skylight replacement in Isleworth?
Yes. We carry out skylight replacement in Isleworth and across Greater London. Send your postcode and we will offer a survey date when we reply.
How do I book a survey in Isleworth?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
