Selling a property in Belgium involves several steps, legal obligations, and important financial consequences. From the very beginning of the process, each stage must be carried out in the correct order, as any omission or mistake can lead to consequences that are difficult to reverse. In addition, the Belgian legal framework has specific features compared to other countries, such as differences depending on the region (Brussels, Flanders, Wallonia), as well as strict rules on pre-contractual information and seller liability.
In this article, we explain how to sell a property in Belgium step by step, and we provide practical advice to ensure a smooth and efficient sale, without surprises. At Arthur & Marin, we support you throughout the entire selling process.
How does the sale of real estate work in Belgium?
Selling a property in Belgium is not just about finding a buyer. From the moment a purchase offer is made, legal obligations can already arise for both parties. Understanding how the process works and what it includes is essential to protect your interests and sell with confidence.
Notarial intervention is mandatory in Belgium
In Belgium, the sale of a property must always be formalized through a public deed before a notary. Without this step, ownership is not officially transferred. The notary ensures that everything is compliant. For example, they verify who the legal owner is, whether there are debts or charges on the property (such as mortgages), whether the documentation provided is valid, and whether all legal requirements are met, including urban planning and environmental regulations.
💡 At Arthur & Marin, we work with trusted notaries specialized in real estate transactions in Belgium, ensuring a fast and efficient process.
Offer, preliminary agreement and final deed
The sale process is divided into three main stages. First, the purchase offer, where the buyer proposes to acquire the property at a certain price. Next comes the compromis de vente (preliminary sales agreement), which is a binding contract where both parties agree in writing to sell and purchase the property at a specific price and date. Once signed, both parties are legally obliged to proceed with the transaction, and in Belgium, this document has legal value, as we will explain further below. Finally, the notarial deed is signed, usually a few months later, as agreed in the preliminary contract.
The preliminary agreement (compromis de vente)
A common mistake is to think that the compromis de vente (sale agreement) is just a non-binding document. In reality, it is a contract that legally binds both the seller and the buyer. Once signed, neither party can withdraw freely. If they do, they may face consequences such as having to pay compensation or even being forced to complete the sale through court proceedings. For this reason, it is important to carefully review all clauses before signing.
💡 The most important elements in the contract are the price, deadlines, conditions (for example, whether the buyer needs financing or a mortgage), and any information about the property that must be disclosed before the sale.
Steps to sell a property in Belgium
Understanding the different stages of the sale allows you to anticipate issues and avoid mistakes. Below, we explain the process.
Preparation of documentation
Before selling a property in Belgium, it is essential to gather all the required documentation. Many problems in property sales arise from incomplete or incorrect documents. The main documents include the PEB certificate, which provides information on the property’s energy efficiency, the electrical certificate, urban planning information detailing the legal status of the property, the soil certificate depending on the region (Brussels, Flanders or Wallonia), and the title deed.
In many cases, additional documents are also required, such as the DIU (post-intervention file) or information related to co-ownership. In addition, the seller has a pre-contractual duty to inform the buyer. This means that any incorrect or omitted information about the property may lead to liability, a price reduction, or even a legal dispute for “hidden defects” after the sale. You can find more information about hidden defects on our website.
💡 Tip: Prepare all documentation properly from the beginning to avoid delays and reduce risks and liability.
💡 At Arthur & Marin, we assist and represent you in obtaining all the necessary administrative and legal documents, working with the municipality, land registry, and all relevant institutions.
Setting the price and purchase offer
The next step is to determine the sale price. It is important to distinguish between the market value, the cadastral value, and the value attributed for tax purposes. The market value is the price the property can achieve based on factors such as location, age, size, and condition. The tax value, on the other hand, can impact taxation, particularly in the case of capital gains. In the purchase offer, the potential buyer may also include conditions, such as obtaining financing or a mortgage.
💡 Warning: Setting a price that is too low may have tax consequences. If the tax authorities consider that the price is significantly below market value in order to reduce capital gains tax, penalties may be imposed and you may be required to pay the difference.
Preliminary sales agreement (compromis de vente)
From the moment it is signed, both the buyer and the seller are legally bound to complete the sale. Typically, the buyer pays a deposit, usually around 10% of the purchase price. The agreement also sets out the deadlines and conditions, including the expected date for signing the notarial deed, which is usually about four months later.
⚠️ This is the most sensitive stage of the process. Once signed, it is not possible to withdraw freely without consequences.
💡 Tip: Carefully review all clauses before signing to avoid future issues, especially regarding conditions, deadlines, and responsibilities.
Notarial deed
The final step in selling a property in Belgium is signing the public deed before a notary. This is the moment when ownership is officially transferred. During this stage, the notary carries out all necessary checks (documentation, contracts, offer, etc.), the purchase price is paid, and the transfer is formally completed.
Mandatory documentation to sell a property in Belgium
Before putting a property on the market in Belgium, it is important to gather all the necessary documentation. Below, we explain the key documents required.
Energy certificate (PEB)
The PEB certificate (Performance Énergétique des Bâtiments) is a mandatory document for selling a property in Belgium. It indicates the property’s energy efficiency and consumption through a rating system ranging from A to G. It also provides useful information about energy usage.
Urban planning information
Urban planning information is a document issued by the municipality that describes the legal status of the property from an urban planning perspective. It includes details such as granted permits, possible infringements, and the authorized use of the property.
Soil certificate (attestation du sol)
The soil certificate indicates whether the land is contaminated or if there are any environmental risks. In some cases, it may involve an obligation to carry out remediation work. In Brussels, this certificate is required by the administration.
Title deed
The title deed proves that you are the legal owner of the property and that you have the right to sell it. This document allows the notary to verify ownership and the origin of the property, as well as identify any charges or restrictions.
Dossier d’Intervention Ultérieure (DIU)
The Dossier d’Intervention Ultérieure, known as the DIU, is a technical document. It is a file containing information about the property, such as plans, materials used, and details of any work carried out. The DIU is mandatory when the property has been built or renovated after May 1, 2001, and when multiple professionals have been involved in the works. The seller is required to keep this document and transfer it to the buyer at the time of sale. If the DIU is not available, the notary may request it, which can delay the signing process.
Other relevant documents
In addition to these documents, others may be required depending on the situation of the property. For example, if the property is rented, the lease agreement must be provided. In case of co-ownership, documents from the building management (“syndic”), as well as any outstanding invoices, must be submitted. Certificates related to installations such as gas or water may also be required.
Summary of the required documentation
| Document | What is it? | Mandatory? | Notes |
|---|
| PEB Certificate | Energy performance certificate (A–G rating) | Yes | Must be available when the property is advertised |
| Electrical certificate | Verifies compliance of the electrical installation | Yes (in many cases) | If non-compliant, the buyer must regularize it |
| Urban planning information | Legal and urban status of the property | Yes | Includes permits, infringements, and authorized use |
| Soil certificate | Indicates contamination or environmental risks | Yes (depending on region) | Mandatory especially in Brussels |
| Title deed | Proves ownership of the property | Yes | Allows the notary to verify ownership and charges |
| DIU (post-intervention file) | Technical file (plans, materials, works carried out) | Yes (if applicable) | Mandatory for properties built or renovated after 2001 |
| Lease agreement | Rental contract if the property is leased | Case-dependent | Must be disclosed to the buyer |
| Co-ownership documents | Documents from the building manager (“syndic”) | Case-dependent | Required for apartments or shared buildings |
| Additional certificates (gas, water, etc.) | Installation compliance certificates | Case-dependent | Depends on the property |
Taxes on the sale of real estate in Belgium
The taxation of selling a property in Belgium depends on the nature of the property, the length of ownership, and how the property has been used.
Are taxes payable when selling a property?
In Belgium, the sale of a property by a private individual may not be subject to capital gains tax, particularly when it concerns the primary residence. However, there are certain exceptions. Regarding the type of property, land is subject to stricter rules than buildings. In addition, sales carried out within a short period may be considered speculative and therefore taxed. Finally, the sale of a main residence benefits from a more favorable tax treatment compared to a property held for investment or rental purposes.
Capital gains in Belgium
Capital gain corresponds to the difference between the sale price and the purchase price. However, the taxable base is not always simply this difference, as it may be adjusted by taking into account certain factors such as acquisition costs or investments made in the property. Check our article about inheritance and succession in Belgium.
💡 Important: If the property has been acquired through inheritance or donation, the calculation and taxation may vary.
As a general overview, the main Belgian rules are the following:
| Situation | Typical tax treatment |
|---|---|
| Sale of a main residence | Generally exempt |
| Sale of a building within 5 years of acquisition | 16.5% capital gains tax, plus municipal surcharges |
| Sale of land within 5 years of acquisition | 33% capital gains tax, plus municipal surcharges |
| Sale of land between 5 and 8 years of acquisition | 16.5% capital gains tax, plus municipal surcharges |
| Sale after the relevant holding period, in a normal private context | Generally not taxed |
This overview reflects the usual rules applicable to private individuals selling real estate not held for business purposes. It should still be checked case by case, especially where the facts may suggest speculation, abnormal management of private assets, self-built properties, or assets received by gift or inheritance.
Main residence vs investment property
The distinction between a main residence and an investment property is one of the most important points in Belgian real estate taxation. A family home generally benefits from the most favorable treatment. By contrast, a rental property, second home, or building plot may trigger tax if sold within the applicable period. This difference should be clearly explained in the article because it matches the real search intent of readers who want to know whether their own sale is likely to be taxed.
Buildings, land, and speculative sales
Belgian law draws a clear distinction between buildings and unbuilt land. Land is treated more strictly. A sale of land within five years may be taxed at 33%, while a sale between five and eight years may still be taxed at 16.5%. Buildings are generally taxed at 16.5% if sold within five years of acquisition. In addition, speculative transactions may also be taxed, and municipal surcharges may apply on top of the base rate
Other costs to consider when selling
In addition to potential capital gains taxes, there are other costs that can impact the overall sale. Certificates such as the PEB, the electrical certificate, or the soil certificate involve certain costs that must be covered before the sale. If a real estate agency is involved, their commission must also be taken into account, as it usually represents a percentage of the sale price. As for notary fees, most of these costs are generally borne by the buyer.
Regional differences: Brussels, Flanders and Wallonia
Although the general sale process is similar across Belgium, selling property in Brussels, Flanders or Wallonia is not exactly the same in practice. The main differences concern urban planning rules, mandatory certificates and the regional context of property taxation.
💡 For example, In Brussels, urban planning information is important, and the renseignements urbanistiques are required for any sale or transfer of real rights. Brussels practice also gives particular weight to documents such as the soil certificate, the PEB certificate and the property’s administrative status.
From a tax perspective, it is also useful to distinguish between seller taxation and buyer costs. While capital gains tax rules are mainly governed by Belgian tax law, registration duties for buyers vary by region, with Brussels and Wallonia generally applying 12.5%, while Flanders applies its own regional rates. In practice, this means that a sale should always be prepared according to the region where the property is located, because a document or requirement that is essential in one region may not apply in the same way in another.
Comparison table
| Aspect | Brussels | Flanders | Wallonia |
|---|---|---|---|
| Urban planning information | Urban planning information is central to the sale, and renseignements urbanistiques are required for any sale or transfer of real rights. | Urban planning remains important, but in practice sellers must also focus strongly on technical and environmental certificates. | Urban planning checks are important, and the CU1 certificate provides general information on the planning status of the property and applicable constraints. |
| Soil certificate | The soil certificate is commonly required in practice in Brussels property sales. | The seller must obtain a bodemattest for every transfer of land, including built land and even apartments, and it is needed before signing the compromis. | Soil and environmental issues may also arise depending on the property, but the regional practice is less centered on the Flemish bodemattest model. |
| Asbestos certificate | No equivalent standard sale requirement in the same form as in Flanders. | The asbestattest is a specific Flemish requirement in property sales for older buildings. | No equivalent standard sale requirement in the same form as in Flanders. |
| Practical document | Renseignements urbanistiques, PEB certificate, and administrative status of the property. | Bodemattest and, where applicable, asbestattest are particularly important. | CU1 urban planning certificate is a useful tool to confirm the planning status of the property. |
| Buyer registration duty context | Brussels generally applies 12.5% registration duty on purchases, subject to regional allowances and conditions. | Registration duty is regional, and Flanders applies its own Flemish rules and rates. | Wallonia generally applies 12.5% registration duty, with reduced rates in some cases for a main residence. |
Legal risks when selling a property in Belgium
During the process of selling a property in Belgium, significant legal risks may arise, even after the sale has been completed. It is therefore essential for the seller to take steps to protect themselves.
Liability for hidden defects
One of the most common risks is liability for hidden defects. These are defects that are not visible at first glance and that affect the normal use of the property. Examples include structural issues, neighborhood problems, serious dampness, or faults in installations that have not been disclosed. In Belgium, the seller has a duty to inform the buyer. This means that any relevant issue known to the seller must be disclosed. If not, the seller may be held liable, even after the sale has been completed. This can result in a price reduction, compensation, or even the cancellation of the sale in serious cases.
💡 For this reason, transparency from the outset is essential to avoid future disputes.
Urban planning issues
Another common risk arises when there are unregularized works or modifications carried out without the necessary permits. In such cases, the buyer may face legal problems after acquiring the property. There may also be urban planning infringements, such as constructions that do not comply with regulations or unauthorized uses of the property. It is therefore crucial to verify the urban planning status of the property before proceeding with the sale.
Unfair or poorly drafted clauses
Ambiguous or unbalanced clauses can be detrimental to the seller, particularly regarding deadlines, conditions, or responsibilities. A poorly drafted clause may lead to disputes over the interpretation of the sales contract and complicate the transaction.
💡 Having the contract or compromis de vente reviewed by a lawyer allows you to identify risks, correct clauses, and ensure that the agreement properly protects your interests.
Selling property in Belgium as a foreigner or non-resident
Selling a property in Belgium as a non-resident or foreign owner is fully possible and quite common. The complexity lies in how the transaction is organized remotely and how taxation is managed. Poor planning, on the other hand, often leads to delays or tax issues.
Can a non-resident sell property in Belgium?
There are no restrictions preventing a non-resident from selling a property in Belgium. Like any other owner, the seller must prove ownership, provide the required documentation, and follow the legal process. However, in practice, notaries tend to apply stricter controls in international transactions, particularly regarding the identification of the seller, the origin of funds, and compliance with tax obligations.
Organizing the sale remotely
When it comes to organizing the sale, there are generally two options. The first is to travel to Belgium to sign the documents, which is not always practical. The second, and more common option, is to grant a power of attorney to a lawyer or representative in Belgium. This power of attorney must be issued before a notary in the seller’s country of residence and must usually be accompanied by a Hague Apostille to be recognized in Belgium. In addition, the content of the power of attorney must be carefully drafted to include all necessary powers.
💡 Anticipating this step from the beginning helps avoid delays of several weeks at the final stage.
Taxation as a non-resident
The tax is mainly paid in Belgium, as it is the country where the property is located. This applies whether you are a resident or a non-resident. Belgium has the right to tax any capital gain according to its own rules. However, your country of tax residence may also require you to declare the sale. To avoid double taxation, if a tax treaty exists between Belgium and your country, double taxation agreements apply. These allow you to offset the tax paid in Belgium.
💡 It is important to analyze your situation regarding double taxation before selling to avoid errors and unnecessary costs.
Bank account and receiving payment
The notary will transfer the sale proceeds to the seller once the deed has been signed. For this, it is essential to have a bank account that supports international transfers. In some cases, issues may arise if the account is outside the European Economic Area or if there are enhanced banking controls. Anticipating this aspect helps avoid delays in receiving the payment.
Consult a lawyer when selling a property in Belgium?
In Belgium, although the notary is involved in the final stage of the transaction, their role is neutral. This means they do not advise or protect the interests of each party. For this reason, working with a lawyer can be very helpful in both advising and protecting your interests, especially at key stages where important decisions are made. Below are the situations where legal advice adds real value.
Before putting the property on the market
The first moment when it can be useful to consult a lawyer is even before starting the sale. At this stage, a preliminary analysis allows you to verify the legal status of the property, review the documentation, and identify potential issues. It is common for minor urban planning irregularities, incomplete documents, or unregularized situations to go unnoticed. Anticipating these issues allows you to correct them in advance and avoid delays later in the process.
When receiving and analyzing a purchase offer
In Belgium, a purchase offer can be legally binding if it is properly drafted and accepted by the seller. This means that accepting an offer without prior review may create a legal commitment. A lawyer can review the offer, identify potential risks, and ensure that it includes the necessary conditions to protect your interests.
Before signing the compromis de vente
The compromis de vente is undoubtedly the most important stage of the entire transaction. This document has the value of a final contract, meaning it defines the obligations of both parties. An incorrect or incomplete draft may lead to consequences such as difficulties in completing the sale, disputes with the buyer, or even claims after the transaction. The involvement of a lawyer allows each clause to be reviewed carefully and ensures that the contract is balanced and protects your interests.
In case of complex property situations
Legal advice is especially recommended when the property presents specific complexities. This includes situations involving doubts about urban planning compliance, potential hidden defects, undeclared works, or complex co-ownership structures. If not properly handled, these situations may lead to liability for the seller. A prior legal review helps anticipate and manage these risks.
Maximizing the financial outcome of the sale
Legal advice is not only useful for avoiding risks, but also for improving the overall result of the transaction. Analyzing the tax impact, structuring the sale properly, and negotiating certain conditions can directly influence the final profit. A well-planned sale helps maximize the value obtained and ensures that the transaction is both efficient and secure.
Real cases and examples of property sales in Belgium
In practice, many problems in property sales in Belgium arise from decisions made without proper advice or from a lack of understanding of how the process works. Below are real-life examples inspired by common situations, illustrating the risks involved and how they can be avoided.
Case 1 | Purchase offer accepted without a suspensive condition
A property owner in Brussels received a purchase offer at the asking price and decided to accept it quickly to avoid losing the buyer. However, the offer did not include any suspensive condition related to financing. A few weeks later, the buyer failed to obtain a mortgage and refused to proceed with the purchase. The seller found themselves in a difficult position, as the accepted offer was legally binding. In the end, it was necessary to negotiate compensation, resulting in a loss of time and a delay of several months in the sale.
Case 2 | Urban planning issue detected at the notarial stage
In a sale in Wallonia, the buyer was ready to sign the preliminary agreement (compromis de vente) when the notary discovered that an extension carried out years earlier had not been properly regularized from an urban planning perspective. This led to the suspension of the transaction until the issue could be resolved, requiring additional administrative procedures with the local authorities and causing a delay of several months. The buyer also took advantage of the situation to renegotiate the price downward.
Case 3 | Sale by a non-resident using a power of attorney
A property owner living in Spain decided to sell their property in Belgium without traveling, by granting a power of attorney to a family member. However, the document did not include all the necessary powers to sign the notarial deed. The Belgian notary rejected the power of attorney, which made it necessary to issue a new one through a lawyer in Belgium, have it apostilled, and send it again. This process delayed the signing by several weeks and put the transaction at risk, as contractual deadlines had already been agreed upon.
Personalized legal support to sell your property in Belgium
Selling a property in Belgium involves important legal implications from the very beginning. At Arthur & Marin, we support you throughout the entire process, from the initial stage to the signing before the notary. We review and verify all mandatory documentation, analyze the tax impact, and help you avoid risks and liabilities before they arise.
Our goal is simple, to ensure a smooth, secure sale under the best possible conditions.
Contact us at info@arthurmarin.com or call +32 465 345 345 for a personalized consultation, with a professional, clear approach focused on maximizing your results.
