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An Air Source Heat Pump installation must either receive planning permission or be classified as a permitted development. Permitted development is achieved by compliance to the Town and Country Planning (General Permitted Development) Order. Separate acts apply to England, Wales and Scotland, these are available from www.legislation.gov.uk.

In order to achieve permitted development status in England and Wales the installation must comply with the MCS020 standard, which requires a noise limit below 42 dB(A). It is the responsibility of the MCS Approved Installer to confirm compliance with MCS020. Where this is Nu-Heat you will be contacted by one of our design engineers for information that will enable us to carry out the calculation. The document below explains the questions you will be asked. A copy of the calculation will be inserted into the Commissioning & Warranty Documents section of Nu-Heat’s MCS Handover Pack as proof of compliance.

Please note that compliance to MCS020 does not mean that a heat pump install is classed as permitted development. Other requirements of the Town and Country Planning Act must also be followed, these include:

  • Only 1 ASHP is installed at the property
  • A wind turbine is not installed at the property
  • The ASHP is more than 1m from the edge of the householders boundary (3m in Wales)
  • The ASHP is not installed on a pitched roof or within 1m from the edge of a flat roof
  • The ASHP is not installed at a listed building (other restrictions apply in conservation areas or World Heritage sites)
  • The ASHP is not installed on a wall or roof which fronts a highway
  • The ASHP is not installed on any part of a wall which is above the level of the ground storey (not applicable to Wales)

Should the installation fail to achieve all of these requirements or record a noise level greater than 42 dB(A), planning permission will be required. In Scotland compliance to the Town and Country Planning Act requires nearly all ASHP installs to obtain planning permission.