Coverage
MEP consultants in Wales
MEP design across Wales, to the Building Regulations as applied in Wales, where Parts L and F diverge from the English versions.
BUILDING CONTROL
The statutory route here
Wales applies the Building Regulations 2010, but building regulations are devolved and several parts have diverged from the English versions. Part L and Part F in particular have separate Welsh editions with different targets and different compliance requirements.
The practical consequence is that a design demonstrated as compliant in England is not automatically compliant in Wales, and the compliance modelling has to be run against the Welsh requirements rather than assumed to transfer. This is the single most common error on a cross-border project: an SBEM model built against the English Part L is not a Welsh submission, and the difference is found at building control rather than at design review.
Procedurally Wales works as England does. Approval is obtained through the local authority or a registered building control approver, and there is no equivalent of the Scottish building warrant — work can begin before approval on the building notice route, although full plans submission is normal on anything commercial.
The wider policy layer is separate too. Planning in Wales is set by Planning Policy Wales and Future Wales rather than the English National Planning Policy Framework, and the Well-being of Future Generations (Wales) Act 2015 applies to public bodies — which is why a Welsh public sector brief often asks for whole-life and operational carbon evidence that an equivalent English brief does not.
HOW WE WORK
The compliance route is confirmed against the Welsh editions of the relevant Approved Documents at the outset rather than at submission, and where a client is developing the same building type on both sides of the border the two are modelled separately rather than one being adapted from the other.
Two things worth settling early on a Welsh public sector project. The first is the evidence the client needs: a Well-being of Future Generations duty tends to arrive in the brief as a requirement for operational and embodied carbon figures, and producing those is a different exercise from Part L compliance, best scoped at appointment rather than discovered at Stage 3. The second is signage. Welsh Language Standards apply to public bodies, and statutory and wayfinding signage on their buildings is normally required bilingually — which reaches the electrical package, because exit and emergency signage is specified there and the legend has to be right before it is ordered.
Wales has twenty-two principal councils and no county tier beneath them, so the authority that grants approval is the same one that determines the planning application.
AUTHORITIES
Local authorities in this area
QUESTIONS
Common questions
Are the Building Regulations different in Wales?
Yes. Building regulations are devolved to the Welsh Government, and several parts including Part L on conservation of fuel and power and Part F on ventilation have separate Welsh editions with different requirements from the English versions. Compliance must be demonstrated against the Welsh documents.
Can an English Part L compliance model be reused for a Welsh project?
No. The Welsh editions of Part L set different targets and different compliance requirements, so the model has to be built and run against the Welsh documents. A model produced for the English regulations will not demonstrate Welsh compliance even where the building is identical, and it is normally building control rather than the design team that finds this out.
Does a Welsh project need a building warrant?
No — that is Scotland. Wales follows the same procedure as England: approval through the local authority or a registered building control approver, with a building notice route available and full plans submission normal on commercial work. What differs in Wales is the technical content of the regulations, not the process for getting them approved.
Does the Welsh language affect building services design?
On public sector projects it can. Welsh Language Standards apply to public bodies, and statutory and wayfinding signage on their buildings is normally required in Welsh and English. That reaches the electrical package because exit and emergency lighting signage is specified there, so the legend needs to be confirmed with the client before anything is ordered rather than corrected after installation.