Permitted Development (England)
ASHPs can usually be installed without planning permission under permitted development rights, provided: only one per property, not on a wall facing a highway, noise below 42 dB(A) at neighbour's window, not a listed building.
Conservation Areas and AONBs
In conservation areas and Areas of Outstanding Natural Beauty, restrictions are more severe. Wall-mounted units may require planning permission. Check with your local planning authority.
Listed Buildings
Listed Building Consent is required for any heat pump installation on a listed building.
Scotland, Wales, Northern Ireland
Permitted development rules differ between UK nations. Always verify with your local authority if in doubt.
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heat pump planning permissionASHP permitted developmentheat pump regulations