Cardiff and the Vale
Knocking through to a rear extension in Cardiff and the Vale
Steel beams, padstones and props to open the back of the house safely. Across Cardiff and the Vale we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Cardiff, Barry and Penarth.
Older houses in Cardiff and the Vale often have solid brick back walls carrying a lot of weight, so the steel design comes early. Cardiff and the Vale 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 Cardiff and the Vale?
As a guide, £3,500–£9,000 including VAT. These are guide ranges; the written quote after the survey is the figure that counts.
What approvals does it need in Cardiff and the Vale?
In Wales a rear extension needs Building Regulations approval through the council or a registered approver, and is built to the Welsh Approved Documents, which differ from England's in places, including energy efficiency.
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
Can the whole back wall come out?
Often, with a beam across the full width or a goalpost frame. Some walls need a short pier left at the ends.
Do I need building control for a beam?
Yes. The calculations and the installed steel are checked.
How long does it take?
The wall itself usually comes out in a day or two, timed for when the extension is weathertight.
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.