Notice Period for a Flatmate Leaving in Brussels: How It Works

A flatmate who wants to leave the flatshare before the lease ends cannot just pack up and go: they have to follow a precise procedure. In Brussels, the rules are designed to protect both the person leaving and those who stay.

The Two-Month Notice Period

The outgoing flatmate must give notice of their departure with at least two months' notice. Notification is, in principle, given to the landlord, with a copy to the other flatmates — who are the first affected, since it is their finances and daily life that change.

Finding a Replacement: The Key to Avoiding Complications

If the outgoing flatmate puts forward a replacement accepted by the other flatmates, things are settled simply: the newcomer takes the room, and the flatshare carries on.

The law also provides an alternative: someone who has not found a replacement but can show they made an active search is not left without a solution.

What Happens If No One Replaces the Outgoing Flatmate?

Without a replacement accepted by the other flatmates, or a sufficiently active search demonstrated, the outgoing flatmate remains jointly and severally liable for the rental debts — rent, charges and damage — for up to six months after their notice period ends.

At the end of that period, their future obligations and joint liability with the other flatmates are automatically extinguished (Brussels Housing Code, art. 260 §3).

Why It's Worth Setting This Out in the Agreement

The agreement does not change this legal rule: the six-month joint liability applies regardless. What it does is let flatmates plan for the risk together, so no one discovers it only on the day someone leaves.

• How a replacement is found: who is responsible, within what timeframe, on which channels.
• What counts as an active search and how each flatmate keeps a record of it.
• How flatmates notify and coordinate with each other when someone leaves.
• How shares are recalculated among those who stay.

These questions are settled far more easily in advance, while everyone is on good terms, than on the day a departure does not go as planned. That is the whole difference between a discussion and a conflict.

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