Glass links & glass box roofs in Portishead: what is involved?
Our glass links & glass box roofs service in Portishead covers frameless glass links joining old and new buildings. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Holiday lets and second homes across the South West often want roof windows with blinds and remote opening for when the house is empty. Glass links & glass box roofs suit joining a period house to a new extension or annexe.
From Portishead to Nailsea, Clevedon and Westbury-on-Trym, the same survey-first process applies: measure, specify, fix the price, then fit.
Choices for your Portishead project
- Heated glass on some systems
- Concealed gutters and drainage
- Frameless or slim-framed glass
- Frameless sliding or pivot doors
- Solar-control and low-iron glass
- Visually light connection between buildings
- Bright circulation space
Things we check at survey
- Thermal performance of large glass areas must be calculated
- Structural calculations are part of the design
Planning, building control and Portishead
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.
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. 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.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Portishead
Prices below are shown including and excluding VAT. In Portishead, as elsewhere, making good inside and access equipment are the main variables.
| 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 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Portishead 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.
Glass links & glass box roofs near Portishead
Related work in Portishead
Questions about glass links & glass box roofs in Portishead
Who designs it?
Your architect, or we produce a survey-based design that the glass manufacturer engineers.
Can a glass link be warm enough to use all year?
With insulated glass units, solar control and good detailing, yes — though it will always be brighter and more exposed to temperature swings than a solid room.
Is structural glass safe?
Structural glass is laminated so it stays in place if a ply breaks. The manufacturer designs it for the loads involved.
Do I need to be at home for the survey in Portishead?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
How do I book a survey in Portishead?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
