Pitched roof windows in Porthmadog: what is involved?
For Porthmadog homes and buildings we offer pitched roof windows: centre-pivot and top-hung skylights for tiled and slate roofs. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Welsh planning rules exclude rooflights from permitted development in conservation areas and National Parks, so we check the designation before quoting. In Porthmadog, as anywhere, pitched roof windows are the usual choice for pitched roofs over bedrooms, stairs and bathrooms.
Porthmadog sits about 19 km from Pwllheli and 25 km from Caernarfon, and we cover the whole LL49 postcode district and the roads in between.
What you can choose
- Flashings for tiles, slates or recessed fitting
- Manual, electric or solar-powered opening
- Integral blinds and shutters
- Centre-pivot or top-hung
- Double or triple glazing
- Flashings to suit tiles or slates
- Usually fitted in a day
What to check first
- Rafters may need trimming for wider windows
- Insulation collars and vapour control must be detailed
Do you need permission in Porthmadog?
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. Listed buildings need listed building consent from the council, and flats have no householder permitted development rights.
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 Porthmadog
Prices below are shown including and excluding VAT. In Porthmadog, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large top-hung or electric window | £2,155 – £3,355 | £1,795 – £2,795 |
| Standard centre-pivot window Typical | £1,435 – £2,155 | £1,195 – £1,795 |
| Small roof window | £1,075 – £1,555 | £895 – £1,295 |
How the job runs
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Porthmadog address.
- 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.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Pitched roof windows near Porthmadog
More we do in Porthmadog
Questions about pitched roof windows in Porthmadog
Can a roof window be fitted from inside?
In most cases, yes — only the tiles around the opening are lifted, and much of the work is done from inside the loft.
Can roof windows be electric?
Yes — electric and solar-powered models open by remote and many include rain sensors.
Will it need building regulations approval?
Fitting a new roof window usually involves cutting rafters and changing the thermal envelope, so building control approval (or, in England and Wales, a competent-person route) is normally needed. We tell you which applies.
Do I need to be at home for the survey in Porthmadog?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Do you fit pitched roof windows in Porthmadog?
Yes. We survey and fit pitched roof windows in Porthmadog and across Gwynedd. Send your postcode and we will offer a survey date when we reply.
