Swansea Bay
Roof lanterns and rooflights for rear extensions in Swansea Bay
Lanterns, flat rooflights and walk-on glass that bring light deep into the plan. Rear extensions in Swansea Bay: we cover 6 towns including Swansea, Neath and Briton Ferry, with design, approvals and the build under one contract.

Rear extensions in Swansea Bay gain most from a rooflight placed against the old back wall, where the room would otherwise be darkest. Swansea Bay has Victorian terraces near the centre and semis further out. Welsh permitted development allows up to 4 metres at the rear for many houses.
What does it cost in Swansea Bay?
As a guide, £2,200–£4,500 including VAT. We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
What approvals does it need in Swansea Bay?
Wales has its own Approved Document L, with targets for walls, roofs, floors and glazing similar to but not identical with England's. Heavily glazed designs are checked with a calculation.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent.
Where in Swansea Bay do we work?
FAQ
Questions people ask
Lantern or flat rooflight?
A lantern gives height and a feature; a flat rooflight is cleaner and lower-profile.
Can a rooflight open?
Yes, manually or electrically, with rain sensors.
Will it leak?
Not when fitted on a proper upstand with the membrane dressed up it.
Do you cover all of Swansea Bay?
We cover 6 towns and districts in Swansea Bay, including Swansea, Neath and Briton Ferry.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.