North Wales
Building Regulations for rear extensions in North Wales
Construction drawings, structural calculations and building control through to the completion certificate. We design and build rear extensions across North Wales, from Wrexham and Buckley to Deeside, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.
Older terraces near the centre and post-war semis further out are typical of North Wales. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
What does it cost in North Wales?
As a guide, £2,500–£5,500 including VAT. We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
What approvals does it need in North Wales?
Welsh building regulations apply to every rear extension. The council or a registered approver checks the work against the Welsh Approved Documents and issues a completion certificate.
Wales has its own Approved Document L, with targets for walls, roofs, floors and glazing similar to but not identical with England's. Heavily glazed designs are checked with a calculation.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent.
Where in North Wales do we work?
FAQ
Questions people ask
Full plans or building notice?
Full plans for most extensions: the design is checked before work starts. A building notice suits only simple jobs.
Who inspects the work?
The council's building control team or a registered building control approver (in Scotland, the council's building standards team).
What is a completion certificate?
The document confirming the work meets the regulations. Keep it; buyers' solicitors ask for it.
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.