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

With the tightening of energy legislation, many Brussels homeowners are becoming concerned. Indeed, the new rules linked to PEB Brussels 2026 are shaking up the traditional rental market. The hunt for energy-inefficient properties is officially on, imposing costly renovation work and strict rent restrictions. Facing this legal and financial puzzle, one question arises: how can you continue to generate rental income without going broke on immediate work 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 homeowners

The Brussels real estate landscape is undergoing a true ecological shift. To achieve its climate goals, the Brussels-Capital Region has put in place a strict schedule aimed at eradicating energy-guzzling housing. If you own a property in the capital, these new guidelines affect you directly, whether you are a landlord or simply an occupant.

Read also: British Columbia rental law 2026: Why long-term renting is the future, Student housing shortage in Brussels in 2026: Homestay becomes the go-to solution for the new academic year and Taxation and room rentals in Switzerland: How to declare your rental income in 2026

The scheduled end of energy-inefficient properties by 2033

The first shock measure of this new regulation concerns the certification requirement. By 2025, the PEB (Energy Performance of Buildings) certificate becomes mandatory for absolutely all housing in Brussels, even if you are not planning to sell or rent your property. It is a real energy map of the city that is being drawn, leaving no room for energy anonymity.

But the real guillotine will fall a few years later. The legislation provides for the outright ban of energy-inefficient properties (housing 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 class E, or face 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 put his house on the traditional rental market in 2026, he would be subject to drastic rules, and by 2033, he will have the legal obligation to renovate his property to bring it up to at least class E, whether he rents it out or lives in it alone.

Rent indexation strictly conditioned by the PEB score

The other major component of this reform concerns rental profitability. Historically, annual rent indexation allowed landlords 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.

Specifically, 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 100% full indexation. This measure aims to protect tenants from energy poverty by offsetting their high heating bills with a rent freeze.

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

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

Faced with this wall of constraints, creating an independent living space (such as a studio apartment in your attic) becomes an uphill battle, requiring planning permits, insulation up to strict standards, and an individual PEB certificate. Fortunately, 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 Brussels home, the room is not considered an independent housing unit. Consequently, the legislation does not require the creation of a PEB certificate specific and exclusive to this room. Your home's overall PEB certificate is what 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 notice that this administrative simplification greatly relieves our hosts, who can thus start hosting a student or a young professional much more quickly.

Use case: Sophie owns a large apartment in Ixelles (PEB E). With her children having left the nest, she decides to rent out a room on Roomlala. She does not need to have the 15m2 room certified. She will simply use her apartment's class E PEB to draft her student lease agreement, thereby saving on unnecessary appraisal fees.

Administrative flexibility without a planning permit

In addition to the advantage related to the PEB, renting a room in your primary residence allows you to avoid urban planning complications. Dividing a single-family house to create several distinct apartments requires a planning permit in Brussels. Municipalities are increasingly reluctant to grant these permits to avoid uncontrolled densification and often require heavy offsets (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 purpose of your property. You remain within the framework of a single-family house occupied by its owner.

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

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

Legal points of vigilance to stay on the right side of the law

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

The duty to provide 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 owner to provide the tenant with a copy of the home's overall PEB certificate upon signing the lease. 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 overall 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 this type of rental.

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

The risk of urban planning reclassification

This is the most common trap into which well-intentioned owners 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. Careful: by doing this, you are crossing the red line of Brussels urban planning!

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

To stay 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 through homestays

As we have seen, the 2033 deadline regarding the ban on energy-inefficient properties (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 a room makes full sense from a strategic point of view.

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

This additional income, which is 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 thanks to the sharing economy. By renting out a room for 500 euros per month, you can collect 6,000 euros per year, or 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 true wealth 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. Don't wait for your house to depreciate: valorize your empty spaces today with Roomlala and finance the renovation of tomorrow.