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

In Wigan, 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. Conservation-area coverage in Wigan is genuinely low (around 4% 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 Wigan flat will usually need both freeholder or managing-agent consent and planning permission.

Planning is more straightforward in Wigan than in a lot of the country: only around 3.7% of properties sit inside a conservation area, so most houses can use the permitted-development route for an outdoor unit. Flats are still treated differently, and will usually need Wigan Council's planning permission for a front or side unit.

We hold some decided cooling cases for Wigan and not enough to say anything with. The sample-size floor is there precisely to stop a thin record turning into a confident-looking statistic.

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 Wigan sits around 45 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 Wigan approve outdoor units for homes exactly like this all the time. Roughly 3.7% 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 1% 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.