South Wales Valleys
Pitched and lean-to roof rear extensions in the South Wales Valleys
Lean-to, gable and hipped roofs that give a vaulted ceiling. Rear extensions in the South Wales Valleys: we cover 27 towns including Rhondda, Tonypandy and Bridgend, with design, approvals and the build under one contract.
Pitched roofs suit the cottages and slate-roofed houses in parts of the South Wales Valleys. South Wales Valleys is largely terraced streets on sloping ground, where back gardens step up or down from the house. Excavation, retaining walls and drainage are priced at the survey.
How much does a pitched-roof rear extension cost in the South Wales Valleys?
A pitched-roof rear extension in the South Wales Valleys 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in the South Wales Valleys?
Welsh permitted development allows a single-storey rear extension of up to 4 metres in depth and 4 metres in height, subject to boundary and garden-coverage limits. There is no larger-extension prior approval scheme in Wales.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent.
Where in the South Wales Valleys 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 the South Wales Valleys?
We cover 27 towns and districts in the South Wales Valleys, including Rhondda, Tonypandy and Bridgend.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.