Swansea Bay
Pitched and lean-to roof rear extensions in Swansea Bay
Lean-to, gable and hipped roofs that give a vaulted ceiling. Across Swansea Bay we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Swansea, Neath and Briton Ferry.
Pitched roofs suit the cottages and slate-roofed houses in parts of Swansea Bay. Older terraces near the centre and post-war semis further out are typical of Swansea Bay. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How much does a pitched-roof rear extension cost in Swansea Bay?
A pitched-roof rear extension in Swansea Bay is priced at £1,860–£3,020 per square metre including VAT as a guide, before kitchen fit-out and fees. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £22,500–£36,500 |
| 4 m wide × 5 m deep (20 m²) | £37,000–£60,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission in Swansea Bay?
The Welsh Government's householder rules let many homes add a single-storey rear extension up to 4 metres deep and 4 metres high without a planning application. Deeper projects go through a householder application, because Wales has no prior approval route.
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
Will a lean-to fit under my windows?
We check the sill heights at the survey; low windows usually mean a flat roof instead.
Are roof windows allowed?
Yes; they are the usual way to bring light into a pitched-roof extension.
Is a pitched roof more expensive?
Slightly, typically a few per cent more than a flat roof of the same area.
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.