How to Start Construction Arbitration in Denmark, Step-by-step for Contractors and Owners

Understanding how to start construction arbitration in Denmark is essential for any contractor, subcontractor or project owner facing a dispute under a Danish construction contract. The vast majority of Danish construction agreements, including the widely used AB 18, ABT 18 and ABR 18 standard forms, channel disputes away from the ordinary courts and toward arbitration administered by the Danish Building and Construction Arbitration Board (Voldgiftsnævnet for Bygge- og Anlægsvirksomhed) or, for non-construction-specific commercial disputes, the Danish Institute of Arbitration (DIA). This guide sets out, in practical sequential order, every action a claimant must take, from reviewing the arbitration clause through to obtaining an enforceable award, and provides checklists for required documents, indicative timelines, cost categories and common pitfalls to avoid.

Overview of the Arbitration Process in Denmark and Who It Applies To

Arbitration in Denmark is governed by the Danish Arbitration Act (Voldgiftsloven), which is closely modelled on the UNCITRAL Model Law on International Commercial Arbitration. In the construction sector, arbitration is the default dispute-resolution mechanism rather than litigation. This is because the AB 18 family of standard-form contracts expressly requires arbitration for disputes that cannot be resolved by negotiation or mediation.

When arbitration is used in Danish construction

Arbitration is used whenever the underlying contract contains a valid arbitration clause, and in Danish construction practice, nearly all professionally drafted contracts do. The AB 18 (general conditions for building and construction works), ABT 18 (design-and-build) and ABR 18 (consulting services) each include dispute-resolution provisions that direct the parties first to negotiation and, failing that, to arbitration. For projects that do not use the AB 18 suite, parties may agree on ad hoc arbitration or choose institutional rules such as those of the DIA.

Institutional versus ad hoc arbitration

Most construction arbitrations in Denmark are institutional, administered by the Arbitration Board under its own procedural rules, which were updated in 2019 to align with the AB 18 contracts. The DIA offers a parallel set of rules for commercial disputes, including a simplified arbitration procedure suited to lower-value claims. Ad hoc arbitration, where the parties design the procedure themselves, usually with reference to the Danish Arbitration Act, is less common in construction but remains available if the contract so provides. The choice between institutional and ad hoc arbitration affects filing requirements, fee structures and tribunal-appointment mechanics, all of which are addressed below.

Eligibility and Arbitration Requirements in Denmark

Before initiating arbitration, a prospective claimant must confirm that every eligibility requirement and contractual pre-condition is met. Failing to do so can result in jurisdictional objections, delays or even dismissal of the claim.

Valid arbitration clause, what to check

The starting point is the contract itself. The claimant must locate the dispute-resolution clause (typically found in the general conditions or a separate appendix) and verify the following: the identity of the administering institution, the seat of arbitration, the applicable procedural rules, the number of arbitrators, the language of proceedings, and any requirements for prior negotiation or mediation. Under the Danish Arbitration Act, arbitration can be agreed for all civil-law matters over which the parties have free disposal. If the clause is ambiguous or pathological, for example, referring to a non-existent institution, specialist legal advice should be sought before filing.

Contractual pre-conditions

AB 18 and its companion forms impose mandatory pre-arbitration steps. These typically include written notice of the dispute to the opposing party, an invitation to negotiate and, in certain cases, referral to mediation or a dispute-resolution board. If the contract requires mediation before arbitration, a claimant who bypasses that step risks having the arbitration stayed until the requirement is satisfied. It is therefore critical to document every escalation step in writing, with proof of delivery, before preparing the Notice of Arbitration.

Who can be a claimant

Any party to the arbitration agreement may commence arbitration. Subcontractors who have a direct contractual relationship with the main contractor (and whose subcontract contains its own arbitration clause) may bring claims under that subcontract. Where assignment of rights has occurred, the assignee must present evidence of valid assignment. Foreign companies are equally entitled to initiate arbitration seated in Denmark, provided they satisfy any requirements for local representation or power of attorney.

How to Start Construction Arbitration in Denmark, Step-by-Step Procedure

The following numbered steps map the entire initiation sequence for a construction arbitration in Denmark. The table below summarises the key actors and indicative durations; the detailed guidance follows.

Note: all durations are indicative and depend on claim complexity, the institution’s procedural rules and any contractual deadlines under AB 18. Parties should verify exact time limits with the applicable rules.

Step 1, Review the contract and check the arbitration clause

Begin by obtaining a complete copy of the signed contract, including all appendices, amendments and change orders. Identify the dispute-resolution clause and confirm the arbitration institution, seat, number of arbitrators, language and governing law. Check whether the clause requires prior negotiation, mediation or referral to a dispute-resolution board. Verify that any contractual notice periods (for example, time bars for raising defect claims) have been observed. This internal review should also flag whether the dispute falls within the scope of the arbitration agreement, disputes concerning personal injury, for instance, are typically excluded.

Step 2, Prepare and serve the Notice of Arbitration

The Notice of Arbitration (sometimes called the Request for Arbitration or Statement of Claim) is the formal document that triggers the arbitration. It should contain, at minimum:

• Identification of the parties, full legal names, registration numbers, registered addresses and contact details for each party and their legal representatives.
• Reference to the arbitration agreement, the specific contract clause invoked, with clause number and date of contract.
• Summary of the dispute, a concise statement of the facts giving rise to the claim.
• Relief sought, the amount claimed, the legal basis for each head of claim, and any non-monetary relief requested (such as declarations or specific performance).
• Proposed number and method of appointment of arbitrators, unless already fixed by the clause.
• Exhibits list, a numbered index of supporting documents submitted with the Notice.

Service must comply with the method prescribed in the contract or the institution’s rules. In practice, most Notices are served by courier or registered mail to the respondent’s registered address, with a copy filed simultaneously with the institution. Retain proof of service, a courier receipt or postal confirmation, as evidence of the date on which the arbitration was commenced.

Step 3, File the case with the Danish Institute of Arbitration or chosen institution

Once the Notice of Arbitration has been served on the respondent, the claimant files a copy with the administering institution together with the required registration fee. For a Danish Institute of Arbitration filing, the claimant submits the Notice, supporting exhibits, proof of service on the respondent and payment of the administrative fee. The DIA will acknowledge receipt and review the filing for formal completeness. If the arbitration is conducted under the Danish Building and Construction Arbitration Board’s rules, the filing procedure follows that Board’s own requirements, which are published on its official website. For ad hoc arbitration, there is no institutional filing step; instead, the parties must agree on the procedure for appointing the tribunal.

Step 4, Respondent files an Answer and the tribunal is appointed

Under most institutional rules, the respondent has a defined period, typically 14 to 28 days from receipt of the Notice, to file an Answer. The Answer should address each of the claimant’s factual and legal assertions and, if applicable, include any counterclaims. If the respondent fails to file an Answer within the prescribed period, the arbitration generally proceeds on the basis of the claimant’s submissions. The institution will then facilitate the appointment of the tribunal. Depending on the rules and the contract clause, this may involve each party nominating one arbitrator and the two party-nominated arbitrators selecting a chairperson, or the institution may appoint the entire tribunal.

Once constituted, the tribunal convenes a preliminary procedural conference to set the timetable for submissions, evidence and hearings.

Step 5, Apply for interim measures and urgent relief

If the claimant needs urgent protection, for example, an order to preserve evidence on a construction site, a freezing order over the respondent’s assets, or an injunction to prevent disposal of disputed property, it may apply for interim measures. Under the Danish Arbitration Act, an arbitral tribunal has the power to grant interim measures once it is constituted. Before the tribunal is appointed, or where the measure requires enforcement by a court, the claimant may apply directly to the Danish district courts. Applying for interim relief does not waive the right to arbitrate; the Danish Arbitration Act expressly preserves the arbitration agreement in these circumstances.

Step 6, Document exchange, witness statements and expert evidence

Following the preliminary conference, the parties exchange documents, witness statements and expert reports in accordance with the timetable set by the tribunal. In Danish construction arbitrations, documentary evidence is paramount: contracts, correspondence, site diaries, inspection records, payment certificates and variation orders form the core of most cases. Witness statements should be signed, short and factual. Expert evidence, whether on technical defects, delay analysis or quantum, is often determinative. Parties should ensure that expert reports clearly state the expert’s qualifications, instructions received and assumptions made. The revised rules on taking evidence in arbitration proceedings seated in Denmark, which build on established Danish procedural principles, provide additional guidance on document production and privilege.

Step 7, Hearing and award

The hearing is conducted before the tribunal at the agreed venue, typically in Copenhagen. Both parties present their cases through opening submissions, witness examination and closing arguments. Hearings in construction disputes can last from a single day (for straightforward payment claims) to several weeks (for complex defects or delay disputes involving multiple experts). After the hearing and any post-hearing submissions, the tribunal deliberates and issues its award. The award is final and binding, with no right of appeal on the merits under the Danish Arbitration Act. An award can be enforced in Denmark through the district courts and internationally under the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards.

Documents Needed for Construction Arbitration in Denmark

Assembling the right documents at the outset avoids delays and strengthens the claimant’s position. The following checklist covers the core documents required when initiating arbitration under AB 18 or DIA rules.

Organise documents in a numbered exhibits index and maintain both electronic and hard-copy sets. Early assembly of this file shortens the drafting period for the Notice of Arbitration and reduces the risk of omitting critical evidence.

Timeline for Arbitration in Denmark, Key Deadlines

The total duration of a construction arbitration in Denmark depends on the complexity of the dispute, the number of parties and the responsiveness of the tribunal and institution. Industry observers expect a straightforward payment dispute to reach an award within six to nine months of filing, while complex multi-party defects or delay cases may take 12 to 24 months or longer.

Key deadlines to calendar include:

• Contractual notice period. Check the AB 18 clause that requires written notice of the dispute within a specified period. Missing this deadline can extinguish the right to arbitrate.
• Pre-arbitration steps. If mediation or negotiation is mandatory, allow 30 to 90 days depending on the clause.
• Filing the Notice of Arbitration. No statutory deadline applies, but contractual limitation periods and time bars must be observed.
• Respondent’s Answer. Typically due 14 to 28 days after service of the Notice. If the respondent fails to answer, the claimant should promptly notify the institution.
• Tribunal appointment. Allow two to eight weeks from filing for the tribunal to be constituted.
• Interim relief applications. These should be filed as soon as the need arises, delay can undermine the case for urgency.
• Limitation period. Under Danish law, the general limitation period for contractual claims is three years from the date the creditor became or ought to have become aware of the claim. An absolute cut-off of ten years also applies in certain circumstances. Filing the Notice of Arbitration interrupts the running of limitation.

Exact deadlines vary by contract and institution. Parties should verify each deadline against the applicable AB 18 clause and the rules of the chosen institution before committing to a procedural timetable.

Arbitration Costs in Denmark, Fees and Practical Considerations

Understanding the cost structure is essential for budgeting and for managing commercial expectations. The principal categories of arbitration costs in Denmark are set out below.

In Danish arbitration practice, the tribunal has broad discretion to allocate costs in the final award. The likely practical effect is that the losing party bears a significant share of the arbitration costs, including a contribution to the prevailing party’s legal fees, although full indemnity is not always awarded. Parties should factor in the possibility that cost recovery may be partial and plan their litigation budget accordingly. The applicable institution’s fee schedule should be consulted directly for current figures.

What Is Changing in 2026, Practical Note for Parties

At the time of this review, no new Danish arbitration statute has been enacted that alters the fundamental steps for initiating construction arbitration in Denmark. The Danish Arbitration Act (Voldgiftsloven) and the AB 18 standard forms remain the governing instruments.

2026 practical checklist

Parties preparing to file in 2026 should verify the following before proceeding:

• Institutional rule updates. Confirm whether the DIA or the Danish Building and Construction Arbitration Board has issued revised procedural rules, evidence guidelines or fee schedules since the last published version.
• AB 18 interpretive guidance. Check for any new guidance or amendments to the AB 18 general conditions that affect dispute-notice requirements or arbitration referral.
• Court precedents on interim relief. Early indications suggest that Danish courts continue to support arbitral tribunal authority over interim measures, but recent case law should be reviewed for any developments.
• Cross-border considerations. The rising volume of international energy and infrastructure projects in Denmark means that more arbitrations involve foreign parties. Ensure compliance with power-of-attorney requirements and translation obligations.

Common Pitfalls When Starting Construction Arbitration in Denmark

Avoiding procedural errors at the outset can save months of delay and significant cost. The following pitfalls are encountered regularly in Danish construction arbitrations.

• Missing the contractual notice deadline. AB 18 imposes strict time limits for raising disputes. Failing to issue written notice within the required period can result in the claim being time-barred. Remedy: diarise every contractual deadline and issue notices promptly.
• Bypassing mandatory pre-arbitration steps. If the contract requires negotiation, mediation or referral to a dispute-resolution board before arbitration, skipping that step may lead to a stay of proceedings. Remedy: complete each escalation step and retain documentary proof.
• Filing with the wrong institution. The AB 18 suite directs disputes to the Danish Building and Construction Arbitration Board, not the DIA. Filing with the wrong body wastes time and fees. Remedy: read the clause carefully and confirm the correct institution before filing.
• Serving a defective Notice of Arbitration. A Notice that omits essential elements, such as the relief sought or the arbitration clause reference, may be returned by the institution for correction. Remedy: use the institution’s template or checklist and have the Notice reviewed by counsel before service.
• Failing to preserve evidence. Construction sites change rapidly. If physical evidence (defective works, materials) is not documented and preserved early, it may be lost. Remedy: commission a site inspection and photographic record as soon as the dispute arises.
• Inadequate power of attorney. Foreign companies frequently submit unsigned or insufficiently detailed powers of attorney. Remedy: prepare a specific POA naming the legal representative, the arbitration and the scope of authority, and have it notarised if required.
• Ignoring limitation periods. The three-year limitation period under Danish law runs from the date the claimant became aware of the claim. Remedy: file the Notice of Arbitration well within the limitation period and take legal advice on suspension and interruption rules.
• Assuming automatic cost recovery. Many claimants assume they will recover all legal costs if they win. In practice, cost awards are discretionary and partial. Remedy: budget for irrecoverable costs and discuss cost-recovery expectations with counsel early.
• Delaying interim relief applications. Waiting too long to apply for an injunction or asset-freezing order undermines the urgency argument. Remedy: assess the need for interim measures at the outset and file promptly.
• Neglecting the exhibits index. Submitting documents in no logical order makes it harder for the tribunal to follow the case and can weaken credibility. Remedy: prepare a paginated, chronologically or thematically ordered exhibits bundle from day one.

Sources

1. Danish Institute of Arbitration (Voldgiftsinstituttet), Official Site
2. International Bar Association, Denmark Country Guide (Arbitration)
3. Danish Arbitration Act (Voldgiftsloven), Retsinformation
4. UNCITRAL Model Law on International Commercial Arbitration
5. Danish Courts (Domstol.dk)