The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (SI 2018/558 (W.97))

Commencement: 8th June 2018

Amends: The Building Regulations 2010 and The Buildings (Approved Inspectors etc.) Regulations 2010


These Regulations amend the Building Regulations 2010 and the Buildings (Approved Inspectors etc) Regulations 2010 to bring the requirements in relation to excepted energy buildings under Welsh Ministers control.

Additional amendments to The Building Regulations 2010
These Regulations also amend Part 6 (Energy efficiency requirements). The Welsh Ministers must approve minimum energy performance requirements for new buildings, in the form of target CO2 emission rates, which must be calculated and expressed in accordance with the approved methodology.

Minimum energy performance requirements must be approved by the Welsh Ministers, calculated and expressed in accordance with the approved methodology for:

  • new buildings (other than new dwellings), in the form of target primary energy consumption rates; and
  • new dwellings, in the form of target fabric performance values.


Part 7 (water efficiency) is amended. The potential consumption of water by persons occupying a dwelling must not exceed 125 litres per person per day, calculated in accordance with approved methodology. It applies to a dwelling which is erected or formed by a material change of use of a building.

These Regulations insert Part 7A (Automatic Fire Suppression Systems). It applies where building work consists of the erection or material change of use of a building in relation to:

  • care homes;
  • rooms for residential purposes other than rooms in a hostel (providing temporary accommodation to those who are ordinarily resident elsewhere), an hotel, a prison or young offender institution and a hospital; and
  • dwelling-houses and flats.


It requires automated fire suppression systems to be installed and operational.

Part K (Protection from falling, collision and impact) and Part M (Access and use of building) of Schedule 1 are substituted. Schedule 4 (description of work where no building notice or deposit of full plans required) is also amended.

Link to legislation.gov.uk