Real estate transactions in the Brussels-Capital Region are becoming increasingly complex. In addition to traditional points of attention such as urban planning regulations, soil certificates and the various statutory pre-emption rights of public authorities, less obvious legal mechanisms are also emerging that may have a decisive impact on the course of a sale. One of these is the tenant’s right of preference, a specific right that has applied since 6 January 2024 to the sale of rented residential properties in Brussels.

Although this does not constitute a classic right of pre-emption, whereby the tenant simply steps into the position of a third-party purchaser, the system does require the seller to first submit a concrete and complete offer to sell to the tenant. In that sense, this right of preference may be regarded as a “disguised right of pre-emption.”
This qualification is not merely rhetorical. The notification to the tenant must already include the price and all terms and conditions of the sale. If the tenant accepts these conditions, the sale is immediately concluded. The tenant is therefore not merely given the opportunity to submit a first offer but is presented with a genuine and binding offer to sell, the acceptance of which directly results in a completed transaction.
In practice, this mechanism closely resembles the operation of a traditional right of pre-emption and significantly restricts the seller’s contractual freedom. It therefore requires particular attention from all parties involved, and especially from the notary.
The tenant’s right of preference, as provided for in the Brussels Housing Code, grants the tenant, under certain conditions, a preferential position in the event of the sale of the leased property. This right applies in particular to nine-year leases relating to the tenant’s principal residence (thus excluding short-term leases) and requires that the tenant is effectively domiciled at the property in question.
However, there are also situations in which the right of preference does not apply. This is the case, for example, where a building comprising multiple residential units is sold in its entirety to a single purchaser for a global price, as the property cannot meaningfully be offered separately to an individual tenant. Similarly, the right does not apply where different parts of the same building legally constitute a single indivisible lot under the applicable statutes. The Brussels Housing Code is based on the indivisible nature of the property.
It is important that the building is genuinely sold as a whole; it is not sufficient that a purchaser ultimately acquires the entire building through successive purchases while already owning other parts.
Prior to the sale, the seller must verify whether these conditions are met and whether the right of preference must effectively be offered. This assessment is essential, as failure to comply with this right may have consequences for all parties involved, including the purchaser and the notary.
In the case of a private sale, a two-step procedure applies.
First, prior to entering into the sale agreement, the landlord must offer the right of preference to the tenant. This is done by registered letter with acknowledgment of receipt, containing at least the following elements:
This notification constitutes a genuine offer to sell in favour of the tenant.
If the landlord fails to do so, the same obligation rests successively on the real estate agent and ultimately on the notary. This once again underlines the notary’s active duty of verification.
In addition, a second offer must be made if the landlord ultimately wishes to sell on more favourable terms or at a lower price than those initially communicated to the tenant.
In the absence of a timely response, the tenant is deemed to have waived their right of preference.
Separate rules apply to public sales, but these fall outside the scope of this contribution.
The increasing complexity of real estate transactions reinforces the notary’s role as a central actor.
In accordance with the general principles governing the duty to inform, the notary must fully and accurately inform the parties of the rights, obligations and encumbrances arising from the contemplated legal transaction. This obligation encompasses not only a duty to inform, but also duties of investigation, verification and warning. The notary may therefore not limit themselves to merely formalising the parties’ intentions but must actively assess whether there are legal elements that may affect the transaction.
In the context of the right of preference, this means that the notary must:
These obligations are all the more important in a context where real estate transactions are becoming increasingly complex and risky.
Failure to comply with the right of preference may have significant consequences for all parties involved.
For the seller, this may lead to disputes or claims for damages. For the purchaser, it may result in uncertainty regarding the acquisition of the property.
A tenant whose right of preference has been disregarded may also bring an action for substitution against the purchaser within the statutory time limit. This can seriously undermine the legal certainty of the transaction.
The risks are also real for the notary. If they fail to properly fulfil their duties of information, verification or warning, this may give rise to liability. It is indeed one of the notary’s core responsibilities to prevent parties from entering into an agreement without a full understanding of the legal implications of the right of preference.
The tenant’s right of preference in Brussels is a legal mechanism which, despite its specific structure, may have an impact closely resembling that of a traditional right of pre-emption.
The characterisation as a “disguised right of pre-emption” reflects this reality: the right restricts the seller’s contractual freedom, creates potential uncertainty for the purchaser and imposes an increased responsibility on the notary.
In an increasingly complex real estate landscape, a thorough understanding of this mechanism is indispensable. Underestimating the right of preference may lead not only to delays in the sale process but also to legal uncertainty and potential liability.
For further information or assistance, you can always contact the Real Estate team at Andersen in Belgium.
Ulrike Beuselinck (Partner – Mediator)
I am looking for a specialist in

28.07.2026
•Commercial and Economic Law, Andersen in Belgium
Since 1 July 2026, low-value imports from third countries have been subject to a new customs regime. Council Regulation (EU) 2026/382 of 11 February 2026, amending Council Regulation (EC) No 1186/2009 as regards the removal of the customs duty relief based on a value threshold, abolishes the customs duty exemption that previously applied to consignments with an intrinsic value of less than €150. At the same time, it introduces, on a transitional basis, a flat-rate customs duty of €3 per item in certain situations. This reform constitutes one of the first components of the comprehensive overhaul of the EU Customs Union launched by the European Commission to adapt customs rules to the rapid expansion of global e-commerce.

10.07.2026
•Tax Law, Andersen in Belgium
The Programme Law of 30 May 2026 has introduced - with retroactive effect from 1 January 2026 - a new condition for applying the flat-rate deduction of expenses from the gross income derived from copyright and related rights.

08.07.2026
•Real Estate, Renting and Co-ownership, Andersen in Belgium
Can a landlord refuse a prospective tenant because their income is less than three times the rent? This question has been central to the debate on discrimination in the rental market for several years. In a judgment of 30 March 2026, the Council of State expressly addressed this so-called “three-times-rent rule” for the first time. The judgment provides important clarification for landlords, real estate investors and real estate agents. The Council of State does not hold that the three-times-rent rule is automatically permissible in all circumstances. It does, however, consider that an income requirement equal to three times the rent and charges is not, in itself, disproportionate and therefore cannot, without more, be regarded as prohibited discrimination on the basis of wealth.

08.07.2026
•Commercial and Economic Law, Andersen in Belgium
On 20 May 2026, the Belgian Council of State delivered three landmark judgments (Nos. 266.735, 266.736 and 266.737) holding that the Belgian prohibition on using the terms soldes, solden, sales, Schlussverkauf outside the statutory winter and summer sales periods is incompatible with European Union law and can no longer be enforced.