How we approach walk-on rooflights in Derry/Londonderry
We handle walk-on rooflights across County Londonderry, including Derry/Londonderry. In short: structural glass you can stand on, set flush into terraces and floors. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Wind and rain off the Atlantic make upstand and flashing details important on Northern Irish roofs. Think of walk-on rooflights for roof terraces, balconies and floors above basements.
Derry/Londonderry is the main town we list in County Londonderry; we also cover nearby Strabane and Limavady.
Choices for your Derry/Londonderry project
- Internal floor panels between storeys
- Anti-slip frit or etched top surface
- Fixed or with privacy interlayer
- Integrated in paving pedestals or a timber deck
- Double or triple glazed with a structural top pane
- Flush with paving or decking — no trip edge
- Anti-slip finish on the walking surface
Things we check at survey
- Structural support and the design load must be confirmed by the manufacturer or an engineer
- Glass on roofs people can reach must not be fragile — check the non-fragility rating
Consents for walk-on rooflights in Derry/Londonderry
Most rooflights on houses in Northern Ireland are permitted development under Class B, but not in a conservation area or on a listed building's curtilage. A side-facing window within 15 m of a neighbouring boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
For homes in Northern Ireland, Technical Booklet F1 sets 1.6 W/m²K (or WER Band C) for replacement glazing including rooflights. Extensions follow a 25% glazing allowance in Technical Booklet F1.
Our planning guide covers each nation in more detail.
What do walk-on rooflights cost in Derry/Londonderry?
Guide prices for walk-on rooflights in Derry/Londonderry 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 |
|---|---|---|
| Large or bespoke walk-on panel | £6,595 – £11,995 | £5,495 – £9,995 |
| Mid-size walk-on rooflight Typical | £4,795 – £6,595 | £3,995 – £5,495 |
| Small walk-on panel | £3,595 – £4,795 | £2,995 – £3,995 |
From enquiry to finished job
- Tell us what you have. Send the BT48 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Derry/Londonderry, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Related work in Derry/Londonderry
Walk-on rooflights in Derry/Londonderry: questions
Does it need a structural engineer?
Often, yes. Where the unit sits on new or altered structure, an engineer confirms the support and the manufacturer confirms the glass.
Is the glass slippery?
Walk-on glass has an anti-slip finish, usually a ceramic frit or etched pattern. Like any outdoor surface it needs cleaning to stay effective.
Will it sit flush with my paving?
Yes — the unit is set on its own upstand so the glass finishes level with the surrounding paving or decking.
Do I need to be at home for the survey in Derry/Londonderry?
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 Derry/Londonderry?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
