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

The evolution of shared housing in the Belgian capital

With skyrocketing real estate prices and the constant appeal of the European capital, shared housing and coliving are no longer just trends, but genuine, sustainable lifestyles. 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 shared living every day. However, renting as a group implies shared responsibilities and a strict framework. As of the start of the 2026 school year, 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 is essential to master. We break down the legal rules, the pitfalls to avoid, and the new taxes that are reshaping the landscape of Brussels' shared housing.

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 collective commitment.

Read also: Shared housing in Wallonia: New lease rules for young professionals in 2026, New CIN regulations in Italy: Why hosts are turning to shared housing in 2026 and Youth Rental Voucher 2026: How to benefit from rental assistance for 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 all tenants sign the same document and are jointly bound to the host. The host is not renting 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 among all occupants. Everyone has the same rights regarding the use of common and private spaces. At Roomlala, we always recommend reading this document carefully before committing, as it sets the duration, the total rent amount, and renewal conditions for the entire group.

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

The solidarity clause: what it really implies

The direct corollary of the single contract is the famous solidarity clause. This is the element that reassures hosts and requires great trust among flatmates. Specifically, this clause stipulates that each signatory is responsible for the full rent and utilities vis-à-vis the host.

If one flatmate defaults and does not pay their share, the host has the right to demand full payment from any other flatmate. Solidarity also extends to any potential rental damages noted at the end of the lease. The host will not seek to find out who scratched the living room floor; they will deduct the amount from the overall security deposit or hold the group responsible.

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

The shared housing agreement: An 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. It is the internal regulation 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 split of the total rent (often proportional to room size) and the distribution of utilities (water, electricity, internet, insurance).
• Allocation of damages: The rules for determining who is financially responsible if a common or private item is damaged.
• Daily life: House cleaning organization, rules regarding guests, quiet hours, and whether or not pets are allowed.
• Inventory: The list of furniture and equipment brought by each person to facilitate retrieval upon departure.

For example, if Sophie's room has a private bathroom, the agreement will note 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 split three ways.

The legal value of the agreement vis-à-vis the host

There is one fundamental point of caution we want to highlight at Roomlala: the shared housing agreement only has legal value among the flatmates. It does not bind the host in any way. The latter 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 utilities for three months, Julien and Sophie will have to advance the money to the host (because of solidarity). But they will then be able to use the shared housing agreement before the Justice of the Peace to force Marc to reimburse them.

So, 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: Watch out for 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 gray area of coliving and individual leases

Since the 2026 Belgium coliving law is not yet fully unified, many operators have structured their offerings 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. This is very attractive on paper for young professionals who want flexibility without the financial risk linked to others.

However, regional and municipal authorities view this proliferation of individual leases in single-family homes with great disapproval. They believe it amounts to a disguised hotel or slumlord activity, which weakens the traditional real estate market intended for families.

A consequence of this legal uncertainty: municipalities have decided to crack down to regulate what they consider to be a drift in shared housing.

Financial risks for long-term Brussels housing

This is where our second major point of vigilance comes in. Facing this development, several 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 exceeds 9000 euros annually. Inevitably, these costs are passed on to the tenant's final rent, making coliving with individual leases overpriced.

To circumvent 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 solidarity contract from this tax. If you are looking for coliving, be sure to inquire about the nature of the proposed lease to avoid unpleasant pricing surprises.

Managing your departure and the security deposit during the lease

Life is full of surprises: a professional opportunity abroad, the desire to move in with a partner... Leaving shared housing before 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 this, they must notify their departure by registered letter to the host and all their flatmates while respecting a 2-month notice period.

But be careful, there is a condition sine qua non: the departing tenant must find a replacement. They must propose a new candidate who is solvent and acceptable both to the host and the remaining flatmates (who will have to live with them). If the departing person proves they have conducted active and serious searches but no candidate is 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 departing 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 utilities, regardless of the form of the lease (shared housing or coliving). It is generally held in an individual bank account in the name of all flatmates.

The real puzzle arises during an early departure. Indeed, the security deposit remains locked at the bank until the end of the main lease. The host will not sign a document to release a third or a quarter of the sum, because they need the full deposit to cover the housing until the end of the contract.

The departing tenant therefore cannot recover their deposit from the bank or the host. 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 amendment to the shared housing agreement, signed by all parties, to keep an incontestable written record of this transaction.

Conclusion

In 2026, shared housing and coliving in Brussels offer fantastic housing opportunities, provided you master the legal workings. The single shared housing lease, the solidarity clause, and the shared housing agreement are the pillars of 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 in these processes so that your shared housing experience in the Belgian capital is as secure as it is rewarding.