Cheltenham: 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 Cheltenham whatever the property, because on its own it only cools.

In Cheltenham, the system you choose is a planning decision as much as a comfort one. An air-to-air heat pump on a house qualifies for permitted development because it does both jobs; a unit that only cools is excluded from that route entirely. With around 37% of Cheltenham's EPC-certified stock inside a conservation area (Bafford, The Poets, Prestbury among them), confirming the exact boundary before you site an outdoor unit is the single most valuable planning step to take here.

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 Cheltenham flat will usually need both freeholder or managing-agent consent and planning permission.

Conservation-area coverage runs high in Cheltenham - about 36.9% of properties sit inside one, including Bafford, The Poets and Prestbury. That tightens or removes the usual permitted-development right for a house, so an outdoor unit facing the street will typically need Cheltenham Council to approve planning permission first.

Across all development types, Cheltenham has decided 77 planning applications mentioning air conditioning or other cooling plant - 14 of them householder applications - and approved 92.2% of the 77.

The same figures as counts are 71 approved and 6 refused.

A householder-only rate would be the more useful number, and Cheltenham has not yet decided enough of them for one: 14 is below the sample size we publish a percentage from.

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

Cheltenham has also decided 48 applications mentioning an air-source heat pump, 93.8% of them approved. That is a separate measure from the cooling figures above, since most air-source installations heat rather than cool and the two sets overlap.

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.

Background noise in Cheltenham sits around 50 dB across the property types we profile during the day, which is the level any outdoor unit has to live inside. A machine that is inaudible on a busy street can be the dominant sound in a still garden, so the local baseline changes the answer.

That makes placement the thing to get right: distance from a neighbour's window, and distance from the boundary, do more for an application than the specification of the unit itself.

None of this is a dealbreaker: councils in Cheltenham approve outdoor units for homes like these all the time. Around 36.9% 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 12.9% 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.