When considering installing an air conditioning unit, you might assume it doesn't require planning permission. However, this is rarely the case. This article will guide you through the planning requirements for various cooling systems and help you understand your options.
Many AC suppliers and installers claim that most AC units can be installed without planning permission, often citing Schedule 2, Part 14, Class G of the General Permitted Development Order (GPDO) 2015. However, this is incorrect. Class G applies only to air source heat pumps (ASHP) used "solely for heating purposes," not AC units.
Yes, they do. While air-to-air (A2A) heat pumps can both heat and cool, their cooling function classifies them as AC units in planning terms. Therefore, they don't meet Class G requirements and need planning permission.
Air-to-water (A2W) systems can provide cooling, but it's not their primary function. As Class G is written with A2W systems in mind, they fall under Permitted Development (PD). However, if you're installing an A2W system primarily for cooling, you may need to seek clarification from your Local Planning Authority (LPA).
There's no specific PD guidance for AC units. The closest reference is Schedule 2, Part 1, Class A of the GPDO, which covers alterations to dwellings. However, AC units typically fail to comply with the requirement that exterior materials must be similar to the existing house.
Possibly. If your external unit is so small or well-concealed that it doesn't materially affect the building's appearance, it might not be considered 'development' under Section 55 of the Town and Country Planning Act. However, this is open to interpretation by your LPA.
If you believe your AC installation isn't 'development', apply for a Certificate of Proposed Use or Development.
In most cases, especially in built-up areas, apply for planning permission. This may require a noise assessment.
To maximise your chances of success:
Installing an AC unit without necessary planning permission can result in enforcement action by your LPA. This might include fines and an order to remove the unit, potentially leading to significant costs and inconvenience.
Contrary to popular belief, most AC installations, including A2A heat pumps, require planning permission.
Only A2W heat pumps primarily used for heating fall under Permitted Development. For other systems, you'll likely need to apply for planning permission or prove your installation doesn't constitute 'development'.
Always check with your LPA before proceeding to avoid potential legal issues.
About the Author
Aron Coates is an architect with over two decades of experience, working on projects ranging from historic building restoration to contemporary home design.
