Cardiff and the Vale
Rear extension plans and planning applications in Cardiff and the Vale
Measured survey, design options, planning drawings and the application, handled for you. 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.
Planning applications in Cardiff go to the local planning authority, and we check its local design guidance for rear extensions before drawing. 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.
What does it cost in Cardiff and the Vale?
As a guide, £1,000–£2,500 including VAT. 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?
Welsh rules allow a two-storey rear extension without an application only where the ground floor is no deeper than 4 metres, the upper floor no deeper than 3 metres and at least 10.5 metres remains to the rear boundary. Most homeowners still apply for householder planning permission.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent.
Planning fees in Wales are set by the Welsh Government; we confirm the current householder fee when we prepare the application.
Welsh councils aim to decide householder applications within 8 weeks.
Where in Cardiff and the Vale do we work?
FAQ
Questions people ask
Do I need an architect?
You need accurate drawings by someone who knows householder planning; we provide them.
Can I see the design in 3D?
Yes; we produce simple 3D views so you can judge the size and light.
What if planning is refused?
We review the reasons with you, amend and resubmit or appeal.
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.