Kingston upon Thames: air conditioning planning permission

Since 2025-05-29, England's permitted-development rules let a house fit an air-to-air heat pump - which heats as well as cools - without a planning application in many cases, within set size, siting and noise limits. A cooling-only air conditioning unit does not get that route and needs a full planning application in Kingston upon Thames whatever the property, because on its own it only cools.

Picking a system in Kingston upon Thames therefore decides your planning path as much as your comfort. A unit that heats and cools opens up the permitted-development route on a house; one that only cools never does. About 12% of Kingston upon Thames's EPC-certified stock falls inside a conservation area, concentrated around Old Malden, Presburg Road, The Groves; most homes sit outside one, but it is still worth checking the boundary before you commit to a wall-mounted unit.

Flats are the sharpest exception here as everywhere in England: the permitted-development right for an outdoor unit sits with the house, not the flat, so a Kingston upon Thames flat will usually need both freeholder or managing-agent consent and planning permission.

Neither notably high nor low, Kingston upon Thames's conservation-area coverage sits around 11.6% of properties, with Old Malden, Presburg Road and The Groves among the named areas. That middling figure means your outdoor unit's permitted-development position depends more on exactly where in the borough you are than it would in a more clear-cut area.

So far Kingston upon Thames has decided 10 planning applications mentioning air conditioning or other cooling plant - 8 approved, 2 refused, 7 of them householder. Below our sample-size floor we publish counts and not rates, and 10 is below it.

One more thing about the method: applications are identified from their own description, so the Kingston upon Thames figures cover applications mentioning cooling equipment and will understate rather than overstate real activity.

What actually gets refused, and what councils attach when they approve, is a national picture rather than a local one at the volume of officer reasoning currently published. We set both out with their sample sizes: why cooling applications get refused and the conditions councils attach.

You can also compare what each council decides, where enough decisions exist to publish a figure.

The Kingston upon Thames property types we profile average roughly 48 dB of daytime background noise, and a unit is judged against that baseline rather than in the abstract.

So siting decides more than the equipment does. Moving the outdoor unit away from a neighbour's window and off the boundary line is the single change that most often rescues a borderline application.

None of this is a dealbreaker: councils in Kingston upon Thames approve outdoor units for homes like these all the time. Around 11.6% of local properties sit inside a conservation area, so it is a step to plan for rather than a formality. Being close to a listed building - around 0.9% of homes here sit within 30 metres of one is not the same as your home being listed, and public data can flag conservation status without settling it. This is indicative guidance, not legal advice: confirm the final position with your Local Planning Authority before you install.