Skylight installation for Ystradgynlais: the essentials
Thinking about skylight installation in Ystradgynlais? The short answer: survey, supply and fit — new openings, extensions and fit-only work. The longer answer depends on your roof, which is why we survey before we price.
Slate roofs, stone cottages and terraced valleys are typical across Wales, and slim rooflights that sit low in the slates suit them best. In Ystradgynlais, as anywhere, skylight installation is the usual choice for builders' projects and retrofits into finished roofs.
From Ystradgynlais to Pontardawe, Neath and Briton Ferry, the same survey-first process applies: measure, specify, fix the price, then fit.
Options we can specify in Ystradgynlais
- Internal plaster reveal
- New openings with joist trimming
- Upstands and flashings
- Electrics coordination
- Supply and fit
- Free survey for new installations
- Making good inside included
What to check first
- Building Regulations approval (a building warrant in Scotland) may be needed
- Fit-only work relies on the product being suitable and complete
Planning, building control and Ystradgynlais
In Wales a rooflight on a house is usually permitted development if it stands no more than 15 cm proud of the roof, except on protected land such as conservation areas and National Parks, where permission is needed. A side-facing rooflight within 10.5 m of the boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
Welsh Building Regulations expect new or replacement rooflights to reach 2.2 W/m²K and roof windows 1.4 W/m²K or a Band B rating. Wales also has its own overheating rules (Part O) for new homes, in force since November 2022.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Ystradgynlais
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| New opening in an existing roof, supply and fit | £2,395 – £5,395 | £1,995 – £4,495 |
| Supply and fit into a new extension Typical | £1,435 – £3,595 | £1,195 – £2,995 |
| Fit only, customer-supplied unit | £595 – £1,195 | £495 – £995 |
How the job runs
- 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.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Skylight installation near Ystradgynlais
Related work in Ystradgynlais
Skylight installation in Ystradgynlais: questions
Do you fit rooflights bought elsewhere?
Yes. We check the product and the opening first, and our workmanship terms cover the fitting rather than the product.
How long does installation take?
Fitting into a prepared upstand takes about a day. A new opening in an existing roof, including making good, often takes two to three days.
Is the survey free?
Yes, for new installations. Repair visits are charged.
Is the survey in Ystradgynlais free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Will I need planning permission in Ystradgynlais?
Planning rules in Wales are tighter than in England for rooflights: Class C rights do not apply in conservation areas, National Parks or AONBs, so a rooflight there needs planning permission.
