Skylight replacement in Gorseinon: what is involved?
We handle skylight replacement across West Glamorgan, including Gorseinon. In short: replacing tired domes and failed glass with a modern rooflight. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Welsh planning rules exclude rooflights from permitted development in conservation areas and National Parks, so we check the designation before quoting. In Gorseinon, as anywhere, skylight replacement is the usual choice for yellowed domes, misted glass and leaking roof windows.
Gorseinon sits about 8 km from Llanelli and 9 km from Swansea, and we cover the whole SA4 postcode district and the roads in between.
Options we can specify in Gorseinon
- Fixed to electric opening
- Like-for-like size replacement
- Misted glass unit replacement only
- Upstand rebuild and insulation
- Roof window replacement in pitched roofs
- Usually done in a day
- Option to add opening and rain sensor
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 Gorseinon
Welsh householder permitted development (Class C) allows rooflights that project no more than 15 cm and sit no higher than the existing roof — but not in conservation areas, National Parks, AONBs or World Heritage Sites. 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.
In Wales the limiting values are 2.2 W/m²K for a rooflight and 1.4 W/m²K (or WER Band B) for a roof window in an existing house. A revised Welsh Approved Document L takes effect on 4 March 2027; rooflights in new dwellings stay at 2.2 W/m²K.
Our planning guide covers each nation in more detail.
Guide prices for Gorseinon
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| 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.
- Measure and check. A surveyor visits Gorseinon, measures and checks structure and access.
- 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.
Neighbouring towns
More we do in Gorseinon
Questions about skylight replacement in Gorseinon
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.
Do I need building regulations approval to replace a rooflight?
Replacements in existing homes generally need to meet current thermal standards and may need notification or approval. We advise on the route for your job.
Do I need to be at home for the survey in Gorseinon?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Is the survey in Gorseinon free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
