FAQ: All Your Questions About Flatsharing in Brussels
Notice periods, charges, agreements, social benefits: answers to the most common questions about flatsharing in Brussels.
Answers to the most frequently asked questions about flatsharing in Brussels: notice periods, charges, the flatshare agreement and social benefits. Each answer links, where useful, to the guide that covers the topic in detail.
Is a flatshare agreement mandatory in Brussels?
It is only mandatory if you opt for the specific legal flatshare regime (Brussels Housing Code, art. 257 to 261), which requires the landlord's consent. Outside that regime, nothing stops you from drafting a private agreement between flatmates — and it is strongly recommended.
What is the notice period for a flatmate who is leaving?
Two months. Notice is given to the landlord, with a copy to the other flatmates.
What happens if I cannot find a replacement?
You must demonstrate an active and sufficient search. Otherwise, you remain jointly and severally liable for the rental debts for up to six months after your notice period ends (Brussels Housing Code, art. 260 §3).
Who decides how charges and rent are split?
No one but you. There is no method imposed by law: it is up to the flatmates to set the split, ideally in writing in the agreement.
Does flatsharing affect my social benefits?
Potentially, yes: unemployment benefits, income support or health insurance benefits can shift to the "cohabitant" rate. Each benefit applies its own criteria — check with your paying authority and document your situation.
Does the flatshare agreement need to be signed by the landlord?
No. The agreement only binds the flatmates to each other. The landlord is a party to the lease, not to the agreement.
What should you do when a flatmate leaves or a new one arrives?
Update the agreement with an amendment, and have it signed by all flatmates concerned — including the new arrival.
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