Cardiff and the Vale
Pitched and lean-to roof rear extensions in Cardiff and the Vale
Lean-to, gable and hipped roofs that give a vaulted ceiling. We design and build rear extensions across Cardiff and the Vale, from Cardiff and Barry to Penarth, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.
Pitched roofs suit the cottages and slate-roofed houses in parts of Cardiff and the Vale. Older terraces near the centre and post-war semis further out are typical of Cardiff and the Vale. 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 Cardiff and the Vale?
A pitched-roof rear extension in Cardiff and the Vale 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 Cardiff and the Vale?
In Wales a single-storey rear extension can often be permitted development if it projects no more than 4 metres beyond the rear wall and is no more than 4 metres high. Wales has no prior approval route for deeper extensions, so anything bigger needs a householder planning application.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent.
Where in Cardiff and the Vale 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 Cardiff and the Vale?
We cover 6 towns and districts in Cardiff and the Vale, including Cardiff, Barry and Penarth.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.