A wood or pellet stove in a flat: the flue and the community's permission

The cold weather brings the questions back: a neighbour wants to put a pellet stove or a wood-burning fireplace in their flat and asks whether they need permission. The stove is inside their home, yes. But the smoke does not stay inside, and the pipe that takes it out almost always goes through something that belongs to everyone.

What the neighbour can do on their own

Spain's Horizontal Property Act (Ley de Propiedad Horizontal) allows each owner to alter their home as long as this does not undermine or alter the safety of the building, its general structure, its external layout or condition, or harm the rights of another owner. They must also inform whoever represents the community beforehand (article 7.1).

Putting the appliance in the living room falls within that margin. The problem starts with getting the smoke out.

Where the flue comes out

There are three typical situations, and each one changes the answer:

• The building already has a flue for each flat, designed for this. It is the simplest case, although you need to check that it is in good condition and suitable for the appliance.
• The pipe has to go through the façade. This is the option that causes the most conflict: it changes how the building looks from outside, and many municipal bylaws also restrict or ban flues coming out through the façade.
• The pipe has to run up to the roof through a light well or common areas. That means occupying and drilling through common elements.

In the last two cases the neighbour cannot decide alone: they need authorisation from the owners' meeting. The majority required depends on what the work involves in each building, so it is worth setting it out properly on the agenda and, if in doubt, checking with the property manager or a lawyer before the vote.

What the meeting should ask for

Before voting, the neighbour should provide in writing:

• The model of the appliance and where the flue would run, with a sketch or plan.
• Confirmation that the installation will be done by a licensed installer, in line with the technical regulations in force.
• Who pays for the work, the maintenance and the repair of any damage to common elements. Normally all of it is at their own expense.
• What happens if in the future the pipe gets in the way or has to be removed for work on the building, such as painting the façade or refurbishing the roof.

Recording these conditions in the minutes means that in five years' time nobody is left wondering what the person who installed it agreed to.

The neighbours upstairs count too

Smoke from a badly installed or poorly maintained stove can get in through the windows of the flats above or onto the light well. If that happens, it is no longer a question of looks: it can be a nuisance or unhealthy activity, and the community or the affected neighbour can take action against it.

That is why it is better to think about where the flue will come out before installing it than to argue about it afterwards with smoke inside your home.

Safety: what is not up for negotiation

• Regular cleaning of the flue, as the manufacturer or installer recommends. Dirty flues are a well-known cause of fires.
• A carbon monoxide detector in the home. It is cheap and warns you of a risk you can neither see nor smell.
• Telling your home insurer that the appliance has been installed.
• Not storing pellets or firewood in common areas, such as landings, communal storage rooms or meter rooms, without an express agreement.

Before you buy, ask

The most expensive mistake is buying the stove and then finding out there is no legal way to get the smoke out. If you are thinking of installing one, check your town's bylaws first and raise the matter with the president in good time, so it can go on the agenda of the next meeting.

And if you are the president and the request lands on your desk, keep everything that is submitted: the application, the sketch, the resolution and the conditions. Having it organised in Dommiva, alongside the minutes of the meeting where it was voted on, lets you answer in minutes when, a few years from now, someone asks why that pipe is there.