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Poland’s Code of Civil Procedure (KPC) amendments that took effect on 1 March 2026 have reshaped how construction disputes reach, and move through, the courts. Under the new Art. 458³a, judges are now required to refer qualifying construction cases to mediation before the first preparatory hearing, while a reformed Art. 1161(1) gives parties a clearer statutory pathway to convert pending litigation into arbitration by mutual agreement. For contractors, developers, investors, and the dispute resolution lawyers Poland relies on in the construction sector, these changes demand immediate updates to pre-litigation strategies, contract templates, and courtroom tactics. This guide sets out every procedural step, deadline, and drafting consideration that in-house counsel and external advisers need to act on now.
Key Takeaways
The amendments to the Code of Civil Procedure were promulgated in Dziennik Ustaw (Dz.U. 2026.468) and entered into force on 1 March 2026. The legislative package pursues two complementary objectives: channelling construction disputes into mediation at an early stage, and providing a formal mechanism for parties that prefer arbitration to exit court proceedings by consent.
The centrepiece is Art. 458³a KPC, which establishes a mandatory court referral to mediation for disputes arising from contracts for construction works (roboty budowlane). Once a statement of claim is filed and the court determines the case falls within the scope of Art. 458³a, it must order the parties to attempt mediation before the preparatory hearing or, where no preparatory hearing is scheduled, before the first hearing on the merits. This is not a discretionary invitation, the court is obliged to make the referral for covered cases.
Separately, Art. 1161(1) KPC, sometimes referenced in practitioner shorthand as “Code of Civil Procedure 1161¹”, now provides an explicit statutory basis for converting state-court proceedings into arbitration. Under this mechanism, the parties may submit a joint agreement to the court requesting that the case be transferred to a chosen arbitral tribunal. The court assesses whether the agreement meets formal requirements and does not conflict with public policy before staying or terminating its own proceedings.
Taken together, the reforms expand the ADR options Poland makes available in the construction sector and create new procedural obligations that every party, claimant and defendant alike, must plan for from the outset.
Art. 458³a applies to disputes that arise from umowa o roboty budowlane, contracts for construction works as defined in the Polish Civil Code. The scope is broad and captures the full lifecycle of a construction project, from design through to defect-rectification claims. Industry observers expect courts to interpret the provision purposively, covering most commercial construction litigation.
The amendment targets commercial construction contracts. Consumer disputes, where one party is an individual acting outside trade or business, are generally excluded from the mandatory mediation referral, although courts retain discretion to propose mediation in such cases. Disputes concerning public-procurement contracts for construction works are, however, covered; public entities should expect to participate in court-ordered mediation. Early indications suggest that pure supply contracts (e.g., delivery of materials without installation) may fall outside Art. 458³a, but court practice will need to clarify the boundary.
The court referral to mediation procedure follows a defined chronology. Understanding each stage, and when a party can (and cannot) object, is essential for dispute resolution lawyers Poland practitioners advising on construction claims.
| Stage | Court Action / Trigger | Practical Consequence for Parties |
|---|---|---|
| Pre-hearing (case within Art. 458³a) | Court issues mandatory referral to mediation before the preparatory hearing. | Both parties must engage: propose a mediator, agree on a timetable, and prepare a mediation position statement. |
| Party refuses without justified reason | Court notes refusal on file; may impose cost sanctions under the amended costs provisions. | Risk of bearing full or increased litigation costs regardless of outcome; reputational and tactical disadvantage. |
| Settlement reached at mediation | Mediator submits settlement protocol; court approves and may grant partial reimbursement of court fees (Art. 79 KPC). | Faster closure, reduced costs, enforceable settlement with the force of a court-approved agreement. |
| No settlement / mediation ends | Case returns to court for hearing on the merits; standard litigation timeline resumes. | Litigation continues, but the court has a record of each party’s good-faith (or bad-faith) participation in mediation. |
A critical distinction: the referral to mediation is mandatory for covered cases, but mediation itself remains voluntary. The mediator cannot impose a settlement, and no party can be forced to accept terms. What the law does impose is a procedural obligation to participate in the mediation process, to attend, engage, and make a genuine attempt at resolution. A party that refuses to participate without a justified reason does not face a criminal sanction, but it does face potentially significant cost consequences that can shift the economics of the entire dispute.
The mandatory mediation Poland framework changes how counsel and parties should approach the period before litigation is filed, and the critical first weeks after service. Below is a step-by-step checklist for contractors, developers, and their legal teams.
For a detailed, downloadable version of this preparation checklist, see our guide on how to prepare for mandatory mediation in a Polish construction claim.
The second major reform introduced by the 1 March 2026 amendments is the statutory mechanism to convert litigation to arbitration Poland parties have long sought clarity on. Art. 1161(1) KPC now provides that, at any point before the court issues a final judgment, both parties may jointly apply to transfer the case from the state court to a chosen arbitral tribunal.
The likely practical effect of Art. 1161(1) will be greatest in high-value, technically complex disputes where both parties prefer the confidentiality, flexibility, and specialist expertise that arbitration offers, but where litigation was commenced before an arbitration agreement existed or before the parties appreciated the advantages of arbitration.
Sample, have counsel adapt to the specific case.
“The Parties hereby agree, pursuant to Art. 1161(1) of the Code of Civil Procedure, to submit the dispute currently pending before [Court name, case no.] to arbitration under the rules of [Institution, e.g., the Court of Arbitration at the Polish Chamber of Commerce (KIG)]. The seat of arbitration shall be Warsaw, Poland. The tribunal shall consist of [one / three] arbitrator(s). The language of the proceedings shall be [Polish / English]. The Parties jointly request the court to stay / terminate its proceedings and refer the dispute to the above arbitral tribunal.”
The CCP amendments make it critical to update standard dispute-resolution clauses in construction contracts. Clauses drafted before 1 March 2026 may be incomplete or, worse, may create confusion when the court applies Art. 458³a alongside an existing contractual mediation or arbitration provision. Below are model clauses that reflect the new regime, together with guidance on drafting best practice for dispute resolution lawyers Poland practitioners should adopt.
Clause A, Mediation-First Clause
Sample, have counsel adapt.
“Any dispute arising out of or in connection with this Contract shall first be submitted to mediation administered by [mediation centre] in accordance with its mediation rules. If the dispute has not been settled within [45] days of the appointment of the mediator, or such further period as the parties may agree in writing, either party may commence court proceedings. The parties acknowledge that the court may also refer the dispute to mediation under Art. 458³a KPC.”
Clause B, Convert-to-Arbitration Clause
Sample, have counsel adapt.
“If court proceedings are commenced in respect of any dispute arising out of this Contract, the Parties agree that they may at any time, by written agreement filed with the court pursuant to Art. 1161(1) KPC, convert such proceedings to arbitration under the rules of [arbitral institution]. The seat of arbitration shall be [city], and the language of the proceedings shall be [language].”
Clause C, Two-Tier Clause (Mediation Then Arbitration)
Sample, have counsel adapt.
“Any dispute arising out of or in connection with this Contract shall be resolved as follows: (1) The parties shall first attempt to settle the dispute through mediation administered by [mediation centre]. (2) If the dispute is not resolved within [60] days of the mediator’s appointment, either party may refer the dispute to final and binding arbitration under the rules of [arbitral institution], seated in [city]. The tribunal shall consist of [one / three] arbitrator(s). (3) The parties acknowledge that Art. 458³a KPC may require court referral to mediation if court proceedings are commenced, and agree to cooperate with any such referral.”
Mediation does not always produce a settlement. Where the process ends without agreement, the case returns to the court and proceeds along the standard litigation track. The mediation deadlines Poland parties worked to are replaced by the court’s hearing schedule.
However, the court’s record of each party’s conduct during mediation can have tangible financial consequences. Under the amended cost provisions, a party that refused to participate in court-ordered mediation without justified reason may be ordered to bear a higher share of litigation costs, even if it ultimately prevails on the merits. Conversely, a party that engaged in good faith but did not reach a settlement is unlikely to face any penalty; the law penalises obstruction, not failure to agree.
Where a mediated settlement is reached, the mediator submits the settlement protocol to the court. Once approved, the settlement has the enforceability of a court-approved agreement and can be enforced through standard execution proceedings. The settling parties may also apply for partial reimbursement of court fees under Art. 79 KPC, which provides a direct financial incentive for early resolution.
If the parties have an arbitration clause (or agree to convert under Art. 1161(1)), arbitration remains available as a parallel track. An arbitral award, once rendered, may be enforced through the Polish courts via recognition proceedings, giving the prevailing party access to the full range of enforcement measures.
The 2026 CCP amendments do not simply add a procedural step, they change the strategic calculus of every construction dispute from the moment a claim crystallises. Early advice on whether to pursue mediation proactively, how to prepare a position statement that maximises leverage, and when conversion to arbitration offers a tactical advantage can make the difference between a favourable settlement and years of costly litigation.
Global Law Experts connects contractors, developers, and investors with experienced dispute resolution lawyers in Poland who specialise in construction mediation, arbitration, and the new court-referral procedures. Whether you need representation at a court-ordered mediation, assistance drafting compliant ADR clauses for new contracts, or guidance on converting a pending case to arbitration under Art. 1161(1), our network is ready to assist.
For further background, see our earlier alert on obligatory mediation in construction disputes in Poland from March 2026.
This article is for general guidance only and does not constitute legal advice. Readers should seek specific counsel on the facts of their dispute.
Last reviewed: 8 May 2026. Update if legislation, implementing rules, or court guidance changes.
This article was produced by Global Law Experts. For specialist advice on this topic, contact Wojciech Deja at Today Legal, a member of the Global Law Experts network.
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