New EPC 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 property owners are feeling concerned. Indeed, the new rules linked to the Brussels EPC 2026 are disrupting the traditional rental market. The hunt for energy-inefficient housing is officially on, imposing costly renovation work and strict restrictions on rents. Faced with this legal and financial puzzle, one question arises: how can you continue to generate rental income without breaking the bank on immediate works or endless administrative procedures? At Roomlala, we have analysed the situation in depth. We are convinced that renting out part of your own home stands out more than ever as the ideal solution. A decryption of this complex legislation and the opportunities offered by a homestay.

Understanding the tightening of Brussels EPC 2026: What changes for property owners

The Brussels property landscape is undergoing a real ecological transformation. To achieve its climate goals, the Brussels-Capital Region has set up 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.

See also: British Columbia rental laws 2026: Why long-term renting is the future, Student housing shortage in Brussels in 2026: Homestays become essential for the start of the academic year and Taxation and room rentals in Switzerland: How to declare your rental income in 2026

The scheduled end of energy-inefficient homes by 2033

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

But the real guillotine will fall a few years later. The legislation provides for the outright prohibition of energy-inefficient homes (housing classified as F and G) by 2033. This means that a owner of an old, uninsulated Brussels house will be required to carry out renovation work to reach at least class E, under penalty of regional sanctions. This pressure is accentuated by the Brussels EPC 2026 deadline, which marks a turning point in the authorities' tolerance towards non-compliant properties.

Concrete example: Imagine Marc, owner of a charming townhouse in Schaerbeek. His property is currently classified G due to an uninsulated roof and old window frames. By 2025, he will have to formalise this score via a certificate. If he were to put his house up for traditional 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 in it alone.

Rental indexing strictly conditioned to the EPC score

The other major aspect of this reform concerns rental profitability. Historically, the annual indexation of rents allowed owners 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 penalise landlords who do not invest in insulating their property.

Specifically, if your property has an F or G class EPC, the indexation freeze is total. For an E class EPC, indexation is limited to 50%. Only housing with an A, B, C or D class EPC can benefit from full 100% indexation. This measure aims to protect tenants from energy poverty by compensating for their high heating bills with a freeze on their rent.

For owners practising traditional renting, the loss of income can amount to thousands of euros over the duration of a lease. This is where EPC shared housing regulations and the rules governing shared housing 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 unit (such as a studio apartment in your attic) becomes an obstacle course, requiring planning permission, insulation meeting strict standards, and an individual EPC certificate. Fortunately, Belgium room rental law offers a much more flexible alternative: a homestay within your primary residence.

No individual EPC certificate required for the room

This is one of the major assets 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 establishment of an EPC certificate specific and exclusive to this room. It is the overall EPC certificate of your home that serves as proof.

This nuance is crucial. It saves you from having to hire a certifier to specifically assess the rented room, which would be technically complex anyway (how do you assess the insulation of a single room integrated into a larger heated volume?). At Roomlala, we see 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 (EPC 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 the E class EPC of her apartment to draw up her student lease, thus saving herself unnecessary expertise costs.

Administrative flexibility without planning permission

Beyond the advantage linked to the EPC, renting a room in your primary residence allows you to dodge urban planning burdens. Dividing a single-family house 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 compensation (creation of bike storage, strict fire safety standards, etc.).

By opting for a homestay (via a standard lease or student lease), you share your living spaces (kitchen, bathroom) without changing the urban planning purpose 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 reallocate your property.

This agility makes a homestay the perfect response to the uncertainties linked to the Brussels EPC 2026. You keep total control over your property while optimising its occupancy.

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

Be careful, however, that 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 are keen for our hosts to be perfectly informed to avoid any dispute or regional sanction.

The obligation of information upon signing the lease

Even if you are exempt from an individual EPC for the room, you are not exempt from transparency. Brussels legislation requires the owner to provide the tenant with a copy of the overall EPC certificate of the home, 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 publish a listing on Roomlala, it is your duty to indicate the overall EPC score of your house or apartment. This allows the future tenant, often a student or intern, to estimate their thermal comfort, even if the utility charges are generally inclusive in this type of rental.

Our Roomlala tip: Systematically attach a paper or digital copy of the overall EPC certificate to the rental agreement. Have your tenant sign an acknowledgment of receipt to prove that you have fulfilled your duty of information, thus protecting yourself against any subsequent appeal.

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 separate entrance. Be careful: by doing this, you are crossing the red line of Brussels urban planning!

From the moment the room has all the basic functions (kitchen, sanitary facilities, rest) in a private way and no longer requires sharing common spaces with the owner, it can be reclassified as an "independent unit" 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 subjection to the strict rules of Brussels EPC 2026 for this new unit.

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

Financing your energy transition through homestays

As we have seen, the 2033 deadline concerning the prohibition of energy-inefficient homes (classes F and G) will apply to the entire building, including if you live there alone. The EPC exemption for the room does not therefore exempt you from your regional obligation to renovate your house in the medium term. This is where renting a room makes perfect sense from a strategic point of view.

Insulation work (roof, facades, boiler replacement) is expensive. Although the Brussels Region offers "Renolution" grants, the remaining cost for the owner is often significant. By choosing to rent one or more unoccupied rooms of 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 works. Instead of suffering the pressure of the legislative calendar, you anticipate it thanks to the collaborative economy. By renting a room at 500 euros per month, you can collect 6,000 euros per year, i.e., 24,000 euros by 2028, a substantial budget to redo a roof or insulate a back facade.

In conclusion, faced with the challenges imposed by the Brussels EPC 2026, a homestay is not just an administrative trick. It is a real asset management strategy. It combines the human warmth of hosting, the legal security of a lighter framework, and the financial opportunity to serenely prepare for the ecological transition of your property. Do not wait for your house to depreciate: increase the value of your empty spaces today with Roomlala and finance the renovation of tomorrow.