Published by Kate Anderson on November 29th, 2011

From 1 December 2011, new rules will come in to force which will see changes made to planning permission requirements if you’re planning to install an air source heat pump.

Unlike ground source heat pumps, the installation of air source heat pumps has usually been subject to planning permission.

However from next month new rules will come in to play which will mean planning permission will no longer be an issue.

Air source heat pumps will now join the ranks of the likes of solar PV, solar thermal and biomass boilers, and from December will be classed as a permitted development in England.

However, there are a few stipulations and the following criteria must be met:

  • That there is no wind turbine at the property.
  • It meets additional criteria if you live in a listed building, in a conservation area or a World Heritage Site.
  • The external unit is less than 0.6 m3 in size.
  • The unit is more than one metre from the edge of the householder’s property.
  • It is not on a pitched roof or near the edge of a flat roof.

To read the legislation in full, go to

One Response to New Planning Rules For Air Source Heat Pumps

  1. The list above, while it covers most of the stipulations and criteria required for permitted development rights for air source heat pumps, misses the major requirement, noise. The air source installation needs to meet the MCS020 Planning Standards, in which it is required that the noise level must be below 42dB(a) at a position one metre external to the centre point of any door or window to a habitable room of a neighbouring property as measured perpendicular to the plane of the door or window. Most air source cannot currently meet this and hence unless you have no neighbours, you are still required to obtain planning permission.

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