Awnings and air conditioners on the facade: what is allowed and what is not

The heat arrives and new units and awnings appear. And with them, the same old argument: can a neighbour put that up without asking?

The starting point: the facade is common property

Even if the awning is paid for by one owner and only shades their flat, the facade is a common element. Altering it is not an individual decision. That is the rule everything else follows from.

What communities usually allow

Many buildings approve a single standard at a meeting: same model, same colour, same position for everyone. It is the sensible solution, because:

• It gives the owner certainty about what they can install without asking each time.
• It stops the facade turning into a showroom.
• It saves the community individual arguments that always end badly.

If your building has not approved such a standard, doing so is probably the most profitable agenda item of the year.

Air conditioning units

Same principle, with two practical nuances:

• Where the outdoor unit goes matters: an internal courtyard, the street facade and the roof are not the same, neither aesthetically nor for noise.
• Dripping and noise can create liability towards affected neighbours, regardless of appearance.

If it is already up without permission

First, do not go in hard. A written, polite, documented notice resolves most cases. If the community standard was approved and is reasonable, the community position is solid; if nothing was ever approved and there are ten other units installed the same way, demanding it of one person alone is hard to sustain.

What saves the chair time

Having the standard approved, in writing and available to everyone. With that, 90% of these conversations stop existing.

And if something is in a listed building or a historic centre, check with the council first: there, planning rules override whatever the community agrees.