What does skylight installation in Dolgellau involve?
We handle skylight installation across Gwynedd, including Dolgellau. In short: survey, supply and fit — new openings, extensions and fit-only work. 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. Think of skylight installation for new extensions, new openings and fit-only jobs.
Dolgellau is around 56 km from Bangor, Gwynedd, and we survey and fit throughout that part of Gwynedd, including the LL40 district.
Options we can specify in Dolgellau
- Fit only (customer-supplied units)
- Supply and fit
- Electrics coordination
- New openings with joist trimming
- Upstands and flashings
- Fit-only for units you have bought
- Fitting for builders on new extensions
What to check first
- Structural changes may need an engineer's check
- Fit-only work relies on the product being suitable and complete
Consents for skylight installation in Dolgellau
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. A revised Welsh Approved Document L takes effect on 4 March 2027; rooflights in new dwellings stay at 2.2 W/m²K.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Dolgellau
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.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
Related work in Dolgellau
Skylight installation in Dolgellau: questions
Who handles building control?
We tell you which route applies — building control approval, a building warrant in Scotland, or in England and Wales self-certification by a registered competent person — and supply the product data.
Do you work with builders?
Yes — on new extensions we fit to the builder's programme once the upstand or roof is ready.
Do I need a structural engineer?
For new openings that cut joists or rafters, a structural check is sensible and building control may ask for calculations.
Do you offer skylight installation in Dolgellau?
Yes. We carry out skylight installation in Dolgellau and across Gwynedd. Send your postcode and we will offer a survey date when we reply.
Do I need to be at home for the survey in Dolgellau?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
