One of the most common questions we get asked before an air conditioning installation is whether planning permission is needed. The short answer: for most London homes, no — but there are important exceptions worth knowing about before you book anything in.
Do You Need Planning Permission for Air Conditioning?
Most residential air conditioning installations fall under Permitted Development rights, meaning you can install a system without applying for planning permission — provided the outdoor unit meets certain size and placement rules (broadly: not on a wall facing a highway, not above the roofline, and positioned with reasonable distance from a neighbouring property).
When You Might Need Permission
- Listed buildings — almost always require Listed Building Consent for any external unit, regardless of size.
- Conservation areas — some councils restrict external units visible from the street, even under Permitted Development.
- Flats and leasehold properties — your lease may have its own rules about external alterations, separate from council planning law. Always check with your freeholder or management company first.
- Commercial premises — larger or more visually prominent units on shopfronts or office buildings are more likely to need sign-off, especially in town centres.
What This Means For Your Installation
In practice, most of our residential customers across London don’t need to apply for anything — but because rules vary by borough and property type, we check this as a standard part of every free survey. If your property does need permission or lease approval, we’ll tell you clearly before any work is booked in, not after.
Get a Clear Answer for Your Property
Rather than guessing based on general rules, the most reliable way to know where you stand is a quick check by someone who installs systems across London every week. Book a free survey and we’ll confirm exactly what, if anything, your property needs before you commit to an air conditioning installation.