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 mere trends, but genuine, long-term lifestyle choices. Students, young professionals, and even people in their forties 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 involves 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 understand. We break down the legal rules, the pitfalls to avoid, and the new taxes that are reshaping the landscape of shared housing in Brussels.

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

Brussels housing legislation has clarified the status of shared living arrangements 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 that all tenants sign the same document and are jointly bound to the host. 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 spaces. At Roomlala, we always recommend reading this document carefully before committing, as it defines the duration, total rent, and renewal terms 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 host wants to adjust the rent for inflation or carry out repairs, 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 to the single contract is the well-known solidarity clause. This is the element that reassures hosts and requires a high level of trust between roommates. In concrete terms, this clause stipulates that every signatory is responsible for the full amount of the rent and utilities to the host.

If one roommate fails to pay their share, the host is legally entitled to demand full payment from any other roommate. This solidarity also extends to any potential damage to the property noted at the end of the lease. The host will not try to find out who scratched the living room floor; they will withhold the amount from the total security deposit or pursue the group.

This is why choosing your future roommates is crucial. At Roomlala, we facilitate communication beforehand so you can assess the reliability of your future housemates. Good interpersonal rapport must be accompanied by total financial transparency to ensure the solidarity clause does not become a burden.

The roommate agreement: An essential and mandatory tool

To counterbalance the rigidity of the single lease and the solidarity clause, the Brussels legislature has made an internal document mandatory: the roommate agreement. This acts as the internal rules for your community living.

What must this legal document contain?

The roommate agreement is the internal law of your apartment. It must be written and signed by all roommates before moving in. Its purpose is to prevent conflicts by clarifying the rules of the game from day one. To be effective, it should 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 utilities (water, electricity, internet, insurance).
• Allocation of damages: The rules for determining who is financially responsible if a shared or private item is damaged.
• Daily life: Housework 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 recovery 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 regarding the host

There is a fundamental point of vigilance that we at Roomlala want to highlight: the roommate agreement only has legal value between the roommates. 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 roommates, 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 (due to solidarity). But they will then be able to use the roommate agreement before the Justice of the Peace to force Marc to reimburse them.

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

Belgium 2026 coliving law: 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 Belgium 2026 coliving law 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 shared areas, without any solidarity clause with other occupants. On paper, this is very attractive 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 very negatively. They believe it amounts to a disguised hotel business or "slumlord" activity, which weakens the traditional real estate market intended for families.

As a result 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 highly sought-after Brussels municipalities, such as Etterbeek, Ixelles, or Saint-Gilles, have introduced punitive taxes on shared housing units 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 prohibitively expensive.

To circumvent this crushing taxation, the trend in 2026 is a forced return to the single shared housing lease. Municipalities generally exempt housing under 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 the unexpected: a job opportunity abroad, the desire to move in with a partner... Leaving a shared housing arrangement before its term is common, but the procedure in Brussels is strictly regulated to protect those who remain.

Notice rules for early departure

Brussels law allows a tenant to terminate their commitment before the lease expires. To do so, they must notify their departure via registered letter to the host and all roommates, respecting a 2-month notice period.

But be careful, there is a sine qua non condition: the outgoing tenant must find a replacement. They must propose a new candidate who is solvent and acceptable both to the host and the remaining roommates (who will have to live with them). If the outgoing tenant proves they have conducted active and serious searches but no candidate is accepted (often due to abusive blocking by others), they can 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 form of the lease (shared housing or coliving). It is generally held in an individualized bank account in the name of all roommates.

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 host will not sign a document to release one-third or one-fourth of the sum, as they need the total deposit to cover the housing until the end of the contract.

The outgoing tenant therefore cannot recover their deposit from the bank or the host. They must settle it internally: it is the new replacement tenant (or, failing that, the remaining roommates) who must pay them their share of the deposit. We strongly advise you to record this financial exchange in an addendum to the roommate 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 mechanics. The single shared housing lease, the solidarity clause, and the roommate 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 through these processes so that your shared housing experience in the Belgian capital is as secure as it is rewarding.