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

So the system you choose changes your planning path in Worthing, 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. Roughly 11% of Worthing's EPC-certified homes fall inside a conservation area, concentrated in areas like Winchester Road, West Tarring, Warwick Gardens - most addresses are outside one, but the boundary check is worth doing before committing 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 Worthing flat will usually need both freeholder or managing-agent consent and planning permission.

Worthing lands close to the national middle on conservation coverage - about 10.5% of properties, including parts of Winchester Road, West Tarring and Warwick Gardens. With no clear-cut high or low figure to lean on, the permitted-development answer for an outdoor unit here turns more on your exact location than the borough-wide average.

97.6% of the 42 planning applications mentioning air conditioning or other cooling plant that Worthing has decided were approved, a figure covering all development types and including 16 householder applications.

The same figures as counts are 41 approved and 1 refused.

A householder-only rate would be the more useful number, and Worthing has not yet decided enough of them for one: 16 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 Worthing 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.

Background noise in Worthing sits around 47 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 should put you off. Councils across Worthing approve outdoor units for homes exactly like this all the time. Roughly 10.5% of properties sit inside a conservation area, and it is still a genuine step rather than a rubber stamp. Being near a listed building - around 2.9% of homes here sit within 30 metres of one is not the same as being listed yourself, and public records can raise a conservation-area flag without resolving it. This stays indicative, not legal advice: confirm with your Local Planning Authority before you install.