New EPB requirements in Brussels in 2026: What is the impact on renting out a room in your primary residence?

With the tightening of energy legislation, many Brussels-based hosts are becoming increasingly concerned. Indeed, the new rules linked to the PEB Brussels 2026 are disrupting the traditional rental market. The hunt for energy-inefficient housing is officially on, mandating expensive renovation work and strict rent restrictions. Faced with this legal and financial puzzle, one question arises: how can you continue to generate rental income without breaking the bank on immediate renovations or endless administrative procedures? At Roomlala, we have analyzed the situation in depth. We are convinced that renting out part of your own home is more than ever the ideal solution. Here is a breakdown of this complex legislation and the opportunities offered by a homestay.

Understanding the tightening of PEB Brussels 2026: What changes for hosts

The Brussels real estate landscape is undergoing a genuine ecological transformation. To reach its climate goals, the Brussels-Capital Region has put a strict timeline in place to eradicate energy-intensive housing. If you own a property in the capital, these new directives directly concern you, whether you are a landlord or simply an occupant.

Read also: British Columbia rental law 2026: Why long-term rentals are the future, Shortage of student rooms in Brussels in 2026: Homestay becomes the go-to solution for the start of the academic year and Taxation and renting a room in Switzerland: How to declare your rental income in 2026

The scheduled end of energy-inefficient homes by 2033

The first major measure of this new regulation concerns the certification requirement. By 2025, the PEB certificate (Energy Performance of Buildings) becomes mandatory for absolutely all Brussels housing, even if you do not plan to sell or rent your property. A comprehensive energy map of the city is being drawn up, leaving no room for energy anonymity.

But the real blow will come a few years later. The legislation provides for a total ban on energy-inefficient homes (properties rated F and G) by 2033. This means that an owner of an old, uninsulated Brussels house will be required to carry out renovation work to reach at least a class E rating, under penalty of regional sanctions. This pressure is increasing with the PEB Brussels 2026 deadline, which marks a turning point in the authorities' tolerance toward non-compliant properties.

Concrete example: Let's imagine Marc, the owner of a charming town house in Schaerbeek. His property is currently rated G due to an uninsulated roof and old window frames. By 2025, he will have to formalize this score via a certificate. If he were to offer his house for conventional rental in 2026, he would be subject to drastic rules, and by 2033, he will have the legal obligation to renovate his property to raise it to at least class E, whether he rents it out or lives there alone.

Rent indexation strictly conditional on the PEB score

The other major component of this reform concerns rental profitability. Historically, annual rent indexation allowed hosts to keep up with inflation. From now on, this indexation is held hostage by the building's energy score. The region has decided to financially penalize landlords who do not invest in insulating their property.

Concretely, if your property has a class F or G PEB, indexation is completely blocked. For a class E PEB, indexation is limited to 50%. Only housing with a class A, B, C, or D PEB can benefit from full 100% indexation. This measure aims to protect tenants from energy poverty by offsetting their high heating bills with a rent freeze.

For hosts practicing conventional renting, the loss of income can amount to thousands of euros over the duration of a lease. This is where the shared housing PEB regulation and the rules governing shared housing become a hot topic, pushing many landlords to rethink their rental strategy.

Renting a room in your home in Brussels: An advantageous legal exception

Faced with this wall of constraints, creating an independent unit (such as a studio apartment in your attic) becomes an obstacle course, requiring planning permission, strict insulation standards, and an individual PEB certificate. Fortunately, the Belgium room rental law offers a much more flexible alternative: a homestay within your primary residence.

No individual PEB certificate required for the room

This is one of the major advantages of this formula. When you decide to rent a room in your home in Brussels, the room is not considered an independent housing unit. Consequently, legislation does not require the creation of a specific and exclusive PEB certificate for this room. The global PEB certificate for your home is the one that counts.

This nuance is crucial. It saves you from having to hire a certifier to specifically evaluate the rented room, which would be technically complex anyway (how do you evaluate the insulation of a single room integrated into a larger heated volume?). At Roomlala, we have observed that this administrative simplification is a huge relief for our hosts, who can thus start welcoming a student or a young professional much more quickly.

Use case: Sophie owns a large apartment in Ixelles (PEB E). With her children having moved out, she decides to rent out a room on Roomlala. She does not need to have the 15m2 room certified. She will simply use the class E PEB of her apartment to draw up her student rental contract, thus saving herself unnecessary inspection costs.

Administrative flexibility without planning permission

Beyond the benefit related to the PEB, renting a room in your primary residence allows you to avoid urban planning complications. Dividing a single-family home to create several distinct apartments requires planning permission in Brussels. Municipalities are increasingly reluctant to grant these permits to avoid uncontrolled densification and often require heavy compensations (creation of bicycle storage, strict fire safety standards, etc.).

By opting for a homestay (via a standard lease or a student lease), you share your living spaces (kitchen, bathroom) without changing the urban planning status of your property. You remain within the framework of a single-family home occupied by its owner.

• Speed: Immediate rental without waiting months for permit approval.
• Savings: No architect fees or taxes linked to planning permission.
• Flexibility: You can stop renting at the end of the lease without having to re-designate your property.

This agility makes the homestay a perfect response to the uncertainties linked to PEB Brussels 2026. You maintain full control over your assets while optimizing their use.

Points of legal vigilance to stay on the right track

Be careful, however; flexibility does not mean a complete absence of rules. For this experience to remain positive and legal, it is imperative to respect certain obligations. At Roomlala, we ensure our hosts are perfectly informed to avoid any dispute or regional sanctions.

The obligation of information upon signing the lease

Even if you are exempt from an individual PEB for the room, you are not exempt from transparency. Brussels legislation requires the host to provide the tenant with a copy of the home's global PEB certificate as soon as the lease is signed. This certificate must of course be valid (the standard validity period is 10 years).

Furthermore, the obligation to display the energy class in any rental advertisement also applies. If you post a listing on Roomlala, it is your duty to indicate the global PEB score of your house or apartment. This allows the future tenant, often a student or intern, to estimate their thermal comfort, even if utilities are generally included in the rent in this type of arrangement.

Our Roomlala advice: Systematically attach a paper or digital copy of the global PEB certificate to the rental contract. Have your tenant sign an acknowledgment of receipt to prove that you have fulfilled your duty of information, thereby protecting yourself against any future recourse.

The risk of urban planning reclassification

This is the most common trap into which well-meaning hosts fall. To offer more independence to their tenant, some install a small private kitchenette in the room, add a separate shower, and create a distinct entrance. Be careful: by doing this, you are crossing the red line of Brussels urban planning!

The moment the room has all basic functions (kitchen, bathroom, sleeping area) privately and no longer requires sharing common spaces with the owner, it can be reclassified as an "independent dwelling" by regional inspectors. This reclassification leads to disastrous consequences: urban planning infraction (hefty fines), the obligation to apply for a permit retroactively, and above all, immediate submission to the strict PEB Brussels 2026 rules for this new unit.

To remain within the legal and protective framework of Belgium room rental law, the sharing of living spaces (at least the kitchen or the bathroom) must be real and effective. The room must remain a simple part of your own home.

Financing your energy transition thanks to a homestay

As we have seen, the 2033 deadline regarding the ban on energy-inefficient homes (classes F and G) will apply to the entire building, even if you live there alone. The individual PEB exemption for the room therefore does not exempt you from your regional obligation to renovate your house in the medium term. This is where renting out a room takes on its full strategic meaning.

Insulation work (roof, facades, boiler replacement) is expensive. Although the Brussels Region offers "Renolution" grants, the out-of-pocket expense for the owner is often significant. By choosing to rent one or several unoccupied rooms in your house via Roomlala, you generate immediate, monthly, and stable rental income.

This additional income, often partially tax-exempt if structured correctly, can be directly allocated to a savings account dedicated to your future work. Instead of suffering the pressure of the legislative calendar, you anticipate it through the collaborative economy. By renting out a room for 500 euros per month, you can collect 6,000 euros per year, which is 24,000 euros by 2028, a substantial budget for redoing a roof or insulating a rear facade.

In conclusion, faced with the challenges imposed by PEB Brussels 2026, a homestay is not just a simple administrative trick. It is a genuine asset management strategy. It combines the human warmth of hosting, the legal security of a lightened framework, and the financial opportunity to serenely prepare for the ecological transition of your property. Stop waiting for your house to depreciate: valorize your empty spaces today with Roomlala and finance the renovation of tomorrow.