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

So the system you choose changes your planning path in Basildon, not just your comfort. The same box that both heats and cools opens the permitted-development route on a house; a unit that only cools does not. Conservation-area coverage in Basildon is genuinely low (around 1% of EPC-certified homes), so for most addresses an external unit is a lower-friction proposition than in a heritage-dense borough - an honest advantage, not a workaround.

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

Only around 1.4% of Basildon's properties sit inside a conservation area, a low share by national standards. That means most houses here clear the permitted-development bar for an outdoor unit without extra paperwork - though a flat will typically still need Basildon Council to issue planning permission.

90.9% of the 55 planning applications mentioning air conditioning or other cooling plant that Basildon has decided were approved, a figure covering all development types and including 17 householder applications.

The same figures as counts are 50 approved and 5 refused.

A householder-only rate would be the more useful number, and Basildon has not yet decided enough of them for one: 17 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 Basildon 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 Basildon property types we profile average roughly 42 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 Basildon approve outdoor units for homes like these all the time. Around 1.4% 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 0.4% 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.