How we approach glass links & glass box roofs in Isleworth
Thinking about glass links & glass box roofs in Isleworth? The short answer: frameless glass links joining old and new buildings. The longer answer depends on your roof, which is why we survey before we price.
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, glass links & glass box roofs are the usual choice for listed and period buildings where the old wall should stay visible.
Isleworth is around 15 km from central London, and we survey and fit throughout that part of Greater London, including the TW7 district.
What you can choose
- Structural glass beams and fins
- Frameless or slim-framed glass
- Concealed gutters and drainage
- Frameless sliding or pivot doors
- Heated glass on some systems
- Structural glass roof with concealed fixings
- Designed around the existing building
What to check first
- Listed building consent or planning permission is commonly needed
- Thermal performance of large glass areas must be calculated
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.
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.
See our building regulations guide for U-values, glazing limits and self-certification.
Glass links & glass box roofs prices in Isleworth
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Fully frameless link with glass beams | £20,395 – £35,995 | £16,995 – £29,995 |
| Glass roof and glazed sides Typical | £13,195 – £20,395 | £10,995 – £16,995 |
| Glass roof between existing walls | £9,595 – £13,195 | £7,995 – £10,995 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
More we do in Isleworth
Glass links & glass box roofs in Isleworth: questions
How long does a link take?
Design and manufacture are the long part. Fitting is often two to five days.
Do glass links need planning permission?
Often, yes — and listed building consent if either building is listed. We can provide drawings and product data for your application.
Who designs it?
Your architect, or we produce a survey-based design that the glass manufacturer engineers.
Do you fit glass links & glass box roofs in Isleworth?
Yes. We survey and fit glass links & glass box roofs in Isleworth and across Greater London. Send your postcode and we will offer a survey date when we reply.
Will I need planning permission in Isleworth?
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.
