How to File a Construction Conciliation Claim in Belgium (bouwverzoening)

Last reviewed: 24 July 2026

Understanding how to file a construction conciliation claim in Belgium is essential for any contractor, developer or homeowner facing a dispute over defects, delays, payments or contract interpretation. The Construction Reconciliation Commission (Verzoeningscommissie Bouw / Commission de Conciliation Construction), commonly known as the Bouwverzoening, offers a faster and less expensive alternative to court litigation for private-sector construction disputes. Since 1 January 2026, the Flemish Duty of Care obligation has heightened compliance and liability exposure across the construction sector, making early conciliation an increasingly attractive route. This guide sets out the eligibility requirements, step-by-step filing procedure, documents needed, costs, timeline and 2026 regulatory changes that every party to a Belgian building contract should know before filing.

Overview of the Conciliation Procedure and Who It Applies To

The Construction Reconciliation Commission is a recognised alternative dispute resolution (ADR) body listed by both the FPS Economy and the European Commission. Its purpose is to help parties to private construction contracts reach an amicable settlement without resorting to civil court proceedings. The Commission is composed of representatives from the construction sector, typically including architects, contractors and consumer-interest members, who examine the dispute, hear both sides and propose a conciliation solution.

The conciliation procedure in Belgium is available for disputes between consumers (homeowners, property buyers) and construction professionals (contractors, subcontractors, renovation firms) arising from building, renovation or repair works carried out under a written contract. It covers disagreements over defects, incomplete works, cost overruns, delays, contractual interpretation and post-delivery liability.

A critical prerequisite is the presence of a signed standard conciliation clause in the building contract, which confers jurisdiction on the Commission. Without this clause, or a separate written agreement to submit the dispute, the Commission cannot accept the file. The clause is available in French and Dutch from the Commission’s official website. In the 2026 environment, where the Flemish Duty of Care has increased documentation and oversight requirements, disputes are expected to arise more frequently around compliance obligations, making Commission conciliation a particularly relevant and cost-effective first step.

Eligibility and Prerequisites for Filing a Construction Conciliation Claim in Belgium

Who may file and who must sign the clause

Either party to the construction contract may file a claim, whether consumer or professional. Both the client and the contractor (or subcontractor) must have signed the standard conciliation clause for the Commission to have jurisdiction. If multiple contractors are involved, the clause must appear in each relevant contract. A legal representative or lawyer may file on behalf of a party, provided they hold a valid power of attorney.

When conciliation is compulsory or recommended

Conciliation before the Commission is not compulsory under Belgian law in the absence of a contractual clause. However, once both parties have signed the standard clause, participation in the Commission’s process becomes a contractual obligation. Refusing to participate after signing the clause may expose the refusing party to a claim of contractual breach. Even where no clause exists, parties may agree after a dispute has arisen to submit it to the Commission by signing a separate referral agreement.

Industry observers expect that more standard-form contracts in Flanders will incorporate the conciliation clause from 2026 onward, given the heightened obligations under the Flemish Duty of Care and the desire to resolve compliance-related disputes before they escalate to costly litigation.

Cross-border and foreign entity eligibility

Foreign companies and non-resident property owners may file with the Commission, provided the construction works were carried out in Belgium and the signed conciliation clause is present in the contract. All filings and correspondence with the Commission must be in French or Dutch, depending on the applicable linguistic region. Foreign-language supporting documents should be accompanied by a certified translation into the Commission’s working language.

Step-by-Step Procedure: How to File a Construction Conciliation Claim in Belgium

The filing process follows a structured sequence. Each step is set out below as a practical instruction, followed by a summary timeline table.

Step 1: Check the contract for the conciliation clause

Before taking any other action, review the building contract to confirm that the standard conciliation clause has been signed by both parties. The clause must specifically refer to the jurisdiction of the Construction Reconciliation Commission. If the clause is absent, contact the other party in writing to propose signing a separate referral agreement. If they refuse, the Commission cannot accept the file and the dispute must be pursued through mediation, arbitration or court proceedings.

Where the clause is present, confirm that it has not been modified in a way that restricts the Commission’s jurisdiction, for example, by limiting it to certain categories of defects or capping the value of claims. A non-standard or heavily amended clause may be challenged by the respondent.

Step 2: Complete the Commission complaint form and gather supporting documents

Download the official complaint form (klachtformulier in Dutch or formulaire de plainte in French) from the Commission’s website. Complete all required fields, including the identity of both parties, the contract reference, a summary of the dispute, the relief sought and the amount claimed. Sign the form and prepare a comprehensive file of supporting documents (see the Required Documents section below).

The complaint form must clearly describe the factual and legal basis of the claim. Vague or incomplete descriptions may delay processing or result in the Commission requesting supplementary information before the file can be opened.

Step 3: Submit the complaint to the Construction Reconciliation Commission and pay the filing fee

Submit the completed form and supporting documents to the Commission by post or electronically, following the instructions on the Commission’s website. At the same time, pay the Commission filing fee. Retain proof of payment, the file will not be opened until the fee is received and confirmed. The Commission will issue an acknowledgement of receipt, typically within 7 to 14 days, confirming that the file has been registered.

Submit all documents in duplicate where the Commission requires copies for the respondent. Check the Commission’s current submission guidelines for the accepted format (PDF, scanned originals, physical copies).

Step 4: Commission notifies the respondent and the response period begins

Once the file is registered, the Commission notifies the respondent of the claim and transmits a copy of the complaint form and supporting documents. The respondent is invited to file a written reply and any counter-evidence within the period specified by the Commission’s rules, typically 14 to 30 days from notification. If the respondent does not reply within the prescribed deadline, the Commission may proceed on the basis of the claimant’s file alone.

Step 5: Joint file review and pre-hearing correspondence

After the response period, the Commission reviews both parties’ submissions and may request additional documentation or clarification. Where the dispute involves technical questions, for example, structural defects, waterproofing failures or compliance with building specifications, the Commission may appoint a technical expert to examine the site and report. Both parties are given the opportunity to comment on each other’s submissions and on any expert findings before the hearing is scheduled.

Step 6: Conciliation hearing and possible expert involvement

The Commission schedules a conciliation hearing, which is typically held within four to eight weeks of file completion. Both parties (or their representatives) attend the hearing, which may be conducted orally or, in simpler cases, on the papers. The Commission panel hears each party’s position, reviews the evidence and, where an expert has been appointed, considers the expert report.

The hearing is not adversarial in the same way as court proceedings. The Commission’s objective is to facilitate agreement, not to impose a binding decision. The panel may propose compromise solutions, highlight strengths and weaknesses in each party’s position, and encourage the parties to reach a settlement. If an agreement is reached, the Commission records the terms in written settlement minutes (procès-verbal de conciliation / verzoeningsakte).

Step 7: Outcome, settlement minutes, enforceability and when to litigate

If conciliation succeeds, both parties sign the settlement minutes, which constitute a binding contractual agreement. To obtain the enforceability of a court judgment, the settlement may need to be submitted to the competent court for homologation (judicial approval). If conciliation fails, because one or both parties refuse the proposed solution, the Commission issues a termination notice confirming that no agreement was reached. The parties are then free to pursue the dispute through litigation or arbitration without prejudice to their positions.

The written outcome is typically issued within 7 to 21 days of the hearing.

Filing procedure, timeline summary

Required Documents and Information for a Conciliation Claim

Preparing a thorough file at the outset accelerates the conciliation procedure and strengthens the claimant’s position. The documents needed for a Belgian construction conciliation claim are listed below. All documents should be submitted in the language of the proceedings (French or Dutch). Foreign-language documents require a certified translation.

Best practice: organise all supporting documents chronologically, number each exhibit, and include a cover index summarising the content and relevance of each item. This assists the Commission panel and any appointed expert in navigating the file efficiently.

Timeline and Key Deadlines for the Conciliation Procedure

The total duration of a construction conciliation claim in Belgium depends on the complexity of the dispute, the responsiveness of the parties and whether a technical expert is appointed. For a straightforward claim with no expert involvement, the process from filing to written outcome typically takes three to four months. Where an expert site visit and report are required, the timeline may extend to five or six months.

Key deadline considerations include:

• Respondent reply period. The respondent typically has 14 to 30 days from notification to file a written reply. Late replies may be accepted at the Commission’s discretion but can delay the hearing schedule.
• Statute of limitations. Filing a conciliation claim does not automatically suspend or interrupt the running of the limitation period under Belgian law. Claimants should verify whether protective court proceedings need to be initiated in parallel to preserve their rights if limitation is imminent.
• Construction-sector vacation weeks. Belgian construction-sector collective agreements provide for mandatory vacation weeks (typically three weeks in summer and one week around Christmas/New Year). Commission hearings are generally not scheduled during these periods, which can add several weeks to the timeline. Parties should account for the 2026 construction calendar when planning their filing.
• Flemish Duty of Care evidence. Since 1 January 2026, builders in Flanders are subject to heightened documentation obligations. Early preservation of compliance records and inspection logs strengthens the evidentiary position and avoids delays caused by incomplete documentation.

Costs, Fees and Tax Considerations for a Bouwverzoening Claim

One of the principal advantages of the conciliation procedure in Belgium is cost. Commission fees are significantly lower than civil court litigation costs, and the process is designed to minimise ancillary expenses. The table below summarises the typical cost items.

The Commission’s default practice is that each party bears its own costs. There is no “loser pays” principle in conciliation as there is in court litigation. VAT treatment of expert and legal fees follows standard Belgian rules and should be confirmed with the service provider.

What Changes in 2026: The Flemish Duty of Care and Construction Calendars

The most significant regulatory development affecting how to file a construction conciliation claim in Belgium in 2026 is the entry into force of the Flemish Duty of Care (zorgplicht) on 1 January 2026. This obligation, applicable to construction works in the Flemish Region, imposes heightened responsibilities on builders, contractors and project developers to manage safety, defect prevention, subcontractor oversight and environmental compliance throughout the construction process.

The likely practical effect on conciliation is threefold. First, the increased documentation requirements, site inspections, compliance checklists, environmental impact records, generate more evidence that can be used (or demanded) in a Commission proceeding. Second, disputes are expected to arise more frequently around whether the duty of care was adequately discharged, particularly in relation to latent defects and subcontractor quality. Third, contract clauses are being updated to reflect the new obligations, and industry observers expect that more standard-form contracts in Flanders will incorporate the conciliation clause for the Construction Reconciliation Commission as a preferred first-recourse mechanism.

The Flemish Inspection Services announced a six-month grace period from 1 January 2026 for enforcement of the new obligation. Early indications suggest that disputes arising during this transitional window may involve questions about what constitutes “reasonable compliance” in the absence of established precedent.

Parties should also note that the 2026 construction calendar includes the standard Belgian industry vacation weeks, which affect Commission scheduling. Hearings are generally not scheduled during the summer construction shutdown (typically three consecutive weeks in July/August) or the end-of-year break.

Common Pitfalls and How to Avoid Them

• Missing or non-standard conciliation clause. The Commission will refuse jurisdiction if no valid clause exists. Always check the contract before filing. If the clause is missing, propose a separate referral agreement in writing before resorting to court.
• Incomplete complaint form. Omitting required fields, party identification, claim amount, factual summary, causes delays. Complete every section, even if the precise amount is estimated, and attach all supporting documents at the outset.
• Failing to pay the filing fee. The file is not opened until payment is confirmed. Pay immediately upon submission and retain the transfer confirmation.
• Inadequate evidence and poor document organisation. Disorganised files weaken credibility and slow the process. Number all exhibits, provide a cover index and include timestamps on all photographs.
• Ignoring the statute of limitations. Conciliation does not suspend limitation periods. If the limitation deadline is approaching, consider filing protective court proceedings in parallel.
• Assuming the settlement is automatically enforceable. A signed settlement agreement is binding as a contract, but it does not carry the force of a court judgment unless it is homologated by a court. Plan for this additional step if enforcement may be contested.
• Other party refuses to attend. If the respondent refuses to participate despite having signed the clause, the Commission may record the failure and close the file. The claimant can then cite the refusal as evidence of bad faith in subsequent court proceedings.
• Not engaging a lawyer early enough. While legal representation is not mandatory, complex technical disputes, high-value claims and cases involving the Flemish Duty of Care benefit significantly from early legal advice, particularly at the clause-checking and evidence-preparation stages. Find a Belgium construction lawyer to assess your position before filing.

Sources

1. FPS Economy, Construction Reconciliation / BelMED Conciliation Page
2. Construction Reconciliation Commission, Official Intake and Forms
3. Justice Belgium, Commission Listing and Contact
4. Vlaanderen / Departement Omgeving, Regulatory Framework for Construction
5. Belgian Official Gazette (Moniteur belge / Belgisch Staatsblad)
6. European Commission, ADR Bodies Listing (Verzoeningscommissie Bouw)