North Wales
Rear extension plans and planning applications in North Wales
Measured survey, design options, planning drawings and the application, handled for you. Rear extensions in North Wales: we cover 14 towns including Wrexham, Buckley and Deeside, with design, approvals and the build under one contract.

For Wrexham homes we start with a measured survey, then draw options before anything is submitted. North Wales 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 North Wales?
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 North Wales?
In Wales a rear extension of more than one storey can be permitted development if the ground floor projects no more than 4 metres and the upper floor no more than 3 metres, with at least 10.5 metres to the rear boundary. It is not permitted development in conservation areas, National Parks or National Landscapes, so many double-storey schemes need a householder application.
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 North Wales 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 North Wales?
We cover 14 towns and districts in North Wales, including Wrexham, Buckley and Deeside.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.