Coliving and shared housing: Everything you need to know about shared housing leases in Brussels in 2026

The evolution of shared housing in the Belgian capital

With soaring property prices and the constant appeal of the European capital, shared housing and coliving are no longer just trends, but genuine, long-term ways of life. Students, young professionals, and even forty-somethings are turning to these solutions to combine comfort, community, and savings. At Roomlala, we see this growing demand for communal living every day. However, renting as a group implies shared responsibilities and a strict framework. As of autumn 2026, Brussels regulations have been refined to protect both hosts and tenants. At the heart of this system is the Brussels shared housing lease, a specific contract that must be fully understood. Here is a breakdown of the legal rules, the traps to avoid, and the new taxes redrawing the landscape of shared housing in Brussels.

Understanding the Brussels shared housing lease: A single, joint contract

Brussels housing legislation has clarified the situation for shared living spaces by imposing a secure framework. Gone are the days of verbal agreements or precarious contracts: the norm is now structured around a common commitment.

Read also: Shared housing in Wallonia: New lease rules for young professionals in 2026, New CIN sanctions in Italy: Why hosts are turning to shared housing in 2026 and Youth Rental Grant 2026: How to benefit from the aid to rent a room in Spain

The principle of the single contract

In the Brussels-Capital Region, the shared housing lease is fundamentally based on a single contract. This means that all tenants sign the same document and are jointly bound to the landlord. The host does not rent out separate rooms, but rather the entire property to a group considered as a single legal entity.

This formality has a major advantage: it guarantees equal rights for all occupants. Everyone has the same rights regarding the use of common and private areas. At Roomlala, we always recommend reading this document carefully before signing, as it determines the duration, the total amount of rent, and the renewal conditions for the entire group.

Let's take a concrete example: Julien, Sophie, and Marc decide to rent a townhouse in Schaerbeek. They all sign the same lease. If the landlord wants to index the rent or carry out work, they must address the group as a whole. This single contract is the cornerstone of serene and stable long-term housing in Brussels.

The solidarity clause: what it really implies

The direct corollary of the single contract is the famous solidarity clause. It is the element that reassures landlords and requires great trust between flatmates. Concretely, this clause stipulates that every signatory is responsible for the entire rent and utility bills to the landlord.

If one flatmate defaults and fails to pay their share, the landlord is entitled to demand the full payment from any other flatmate. Solidarity also extends to any potential rental damages noted at the end of the lease. The landlord will not seek to find out who scratched the living room floor; they will deduct the amount from the total security deposit or pursue the group.

This is why choosing your future flatmates is crucial. At Roomlala, we facilitate early communication so that you can assess the reliability of your future living partners. A good rapport must be accompanied by total financial transparency to prevent the solidarity clause from becoming a burden.

The shared housing agreement: The essential and mandatory tool

To counterbalance the rigidity of the single lease and the solidarity clause, the Brussels legislator has made an internal document mandatory: the shared housing agreement. This is the code of conduct for your community life.

What must this legal document contain?

The shared housing agreement is the internal law of your apartment. It must be drafted and signed by all flatmates before moving in. Its objective is to prevent conflicts by clarifying the ground rules from day one. To be effective, it must be as comprehensive as possible.

Here are the essential elements it must detail:

• Financial distribution: Who pays what? The exact division of the total rent (often proportional to room size) and the distribution of utility bills (water, electricity, internet, insurance).
• Allocation of damages: The rules to determine who is financially responsible if common or private property is damaged.
• Daily life: The organisation of chores, rules concerning guests, quiet hours, and whether or not pets are accepted.
• Inventory: The list of furniture and equipment brought by each person to facilitate recovery when someone moves out.

For example, if Sophie's room has an en-suite bathroom, the agreement will state that she pays 100 euros more than Julien and Marc. If the shared washing machine breaks down due to normal wear and tear, the agreement will specify that the replacement costs are divided by three.

The legal value of the agreement regarding the landlord

There is a fundamental point of caution we want to highlight at Roomlala: the shared housing agreement only has legal value between the flatmates. It does not bind the landlord in any way. The landlord will always and only refer to the main lease.

However, in the event of a serious dispute between flatmates, this agreement becomes your best legal weapon. If Marc refuses to pay his share of the bills for three months, Julien and Sophie will have to advance the money to the landlord (because of the solidarity clause). But they can then use the shared housing agreement in the Justice of the Peace court to force Marc to reimburse them.

Take the time to draft it meticulously. A good agreement is the guarantee of a peaceful shared living experience where everyone knows their rights and duties.

Coliving law Belgium 2026: Beware of municipal taxes

While traditional shared housing is well-regulated, coliving (which offers furnished private spaces with high-end shared services) is still navigating murky waters. In 2026, the tension between coliving operators and local Brussels authorities reached a critical point.

The legal ambiguity of coliving and individual leases

As the coliving law in Belgium 2026 is not yet fully unified, many operators have structured their offers around individual leases. In this model, each tenant signs a contract only for their room and access to common areas, without any solidarity clause with other occupants. On paper, this is very attractive for young professionals who want flexibility without financial risk linked to others.

However, regional and municipal authorities view this proliferation of individual leases in single-family homes with great suspicion. They believe this resembles a hotel business or disguised illegal lodging, which weakens the traditional real estate market intended for families.

As a consequence of this legal ambiguity, municipalities have decided to crack down to regulate what they consider a deviation of shared housing.

Financial risks for long-term housing in Brussels

This is where our second major point of vigilance comes in. Facing this development, several highly popular Brussels municipalities, such as Etterbeek, Ixelles, or Saint-Gilles, have introduced punitive taxes on shared housing operating with individual leases.

These taxes are heavy: they can reach up to 1550 euros per year per individually rented room. For an operator managing a 6-room house, the bill amounts to over 9000 euros annually. Inevitably, these costs are passed on to the tenant's final rent, making coliving with individual leases overpriced.

To bypass this crushing taxation, the trend in 2026 is a forced return to the single shared housing lease. Municipalities generally exempt housing subject to a single joint contract from this tax. If you are looking for coliving, you must absolutely inquire about the nature of the proposed lease to avoid unpleasant price surprises.

Managing your departure and the security deposit during the lease

Life is full of the unexpected: a professional opportunity abroad, the desire to move in with a partner... Leaving a shared flat before the end of the term is common, but the procedure in Brussels is strictly regulated to protect those who stay.

Notice rules for early departure

Brussels law allows a flatmate to terminate their commitment before the lease expires. To do so, they must notify their departure by registered letter to the landlord and to all their flatmates, respecting a 2-month notice period.

But beware, there is a condition sine qua non: the outgoing tenant must find a replacement. They must propose a new candidate who is solvent and acceptable to both the landlord and the remaining flatmates (who will have to live with them). If the outgoing tenant proves they have carried out active and serious research but no candidate has been accepted (often due to abusive blocking by others), they may still be released from their obligations at the end of the notice period.

At Roomlala, our platform is the ideal tool to quickly find this replacement and ensure a smooth transition, thus avoiding the outgoing tenant having to pay double rent.

The puzzle of the capped security deposit

In Brussels, the security deposit is strictly capped at 2 months' rent excluding charges, regardless of the type of lease (shared housing or coliving). It is generally blocked in an individualised bank account in the names of all the flatmates.

The real puzzle arises during an early departure. Indeed, the security deposit remains blocked at the bank until the end of the main lease. The landlord will not sign a document to release one-third or one-quarter of the sum, as they need the total deposit to cover the property until the end of the contract.

The outgoing tenant therefore cannot recover their security deposit from the bank or the landlord. They must arrange it internally: it is the new replacement tenant (or, failing that, the remaining flatmates) who must pay them their share of the deposit. We strongly advise you to record this financial exchange in an addendum to the shared housing agreement, signed by all parties, to keep an indisputable written record of this transaction.

Conclusion

In 2026, shared housing and coliving in Brussels offer fantastic housing opportunities, provided you master the legal mechanisms. The single shared housing lease, the solidarity clause, and the shared housing agreement are the pillars of a successful cohabitation. Be particularly vigilant regarding coliving offers with individual leases, lest you indirectly suffer the wrath of municipal taxes. At Roomlala, we are committed to supporting you through these processes so that your shared housing experience in the Belgian capital is as secure as it is rewarding.