Mandatory Mediation in Polish Construction Disputes (2026): Practical Compliance Checklist for Contractors & Developers

Last updated: 2 May 2026

Since 1 March 2026, mandatory mediation in construction disputes in Poland has been a procedural reality, courts are now required to refer qualifying construction cases to mediation before litigation can proceed, following the amendment to the Polish Code of Civil Procedure published as legislative project 12406607 on the Rządowe Centrum Legislacji (RCL) portal. The change affects contractors, developers, subcontractors and construction counsel across every project type, from residential builds to large-scale infrastructure. This compliance guide provides the actionable checklists, contract-redrafting templates and workflow timelines that construction dispute resolution in Poland now demands. For broader context on how mandatory models are reshaping ADR across Europe, see our analysis of mediation under pressure, ethics, duress and mandatory models across Europe.

Executive Summary, What You Need to Know Right Now

The 2026 changes can be distilled into five key points and five immediate actions. Before diving into the detail, here is the short version:

• What changed. The Code of Civil Procedure amendment 2026 introduced obligatory court referral to mediation for many construction disputes filed on or after 1 March 2026.
• Mandatory referral, voluntary settlement. Courts must refer covered cases to mediation, but parties are not forced to reach agreement, mediation itself remains a voluntary process in which either side may walk away without settling.
• Who is affected. Every party to a construction contract that could give rise to a civil dispute: general contractors, subcontractors, developers, investors, architects, engineers, and their insurers.
• Consequences of ignoring it. Non-participation may result in adverse cost orders, procedural delays and a negative inference when the court allocates litigation costs.
• Related procedural changes. New e-filing rules and mediation-reporting requirements also took effect on 1 March 2026, meaning counsel must now submit mediation reports and certain court documents electronically.

Top 5 immediate actions:

1. Audit every live and template construction contract for ADR and escalation clauses.
2. Insert or update a mediation-first clause that aligns with the new statutory framework.
3. Identify and shortlist qualified mediators experienced in construction disputes.
4. Train project managers and site teams on evidence-preservation protocols for mediation.
5. Update internal dispute-resolution workflows to include a mandatory mediation step before issuing proceedings.

What Changed on 1 March 2026, The Legal Baseline for Mandatory Mediation Construction Poland 2026

Courts must now refer qualifying construction disputes to mediation. The amendment, tracked as RCL legislative project 12406607, inserted new provisions into the Code of Civil Procedure that make court-ordered referral to mediation obligatory, rather than discretionary, for a defined category of construction-related claims. The Polish Ministry of Justice confirmed the reform’s objectives in public communications, emphasising the need to reduce the backlog of complex construction cases and promote faster, more cost-effective resolution.

Key Statutory Provisions, Plain-English Summary

• Obligatory referral. When a qualifying construction dispute is filed, the court must issue a referral to mediation. This is not a judicial discretion, it is a procedural duty.
• Voluntary participation in substance. While referral is mandatory, the actual mediation sessions remain voluntary. Parties must engage with the process (attend or respond), but they are not compelled to settle.
• Mediation reporting. Following mediation, the mediator must file a report with the court detailing whether sessions took place, whether settlement was reached, and the parties’ participation levels.
• E-filing requirements. Mediation reports and related procedural submissions must now be filed electronically, in line with the broader digitalisation of Polish court procedure introduced on the same date.

Quick Timeline of Legislative Milestones

Which Construction Disputes Are Covered, Scope, Thresholds and Exemptions

Mediation in construction Poland 2026 applies broadly but not universally. The amendment targets civil disputes arising from construction contracts, including payment disputes, delay claims, defect liability actions and performance-related disagreements. However, certain categories of dispute remain outside the mandatory mediation framework.

How Courts Decide Referral, The Judge’s Checklist

Industry observers expect courts to apply a straightforward filter: (1) Is the claim a civil dispute? (2) Does it arise from or relate to a construction contract? (3) Is it filed on or after 1 March 2026? If all three conditions are met, referral is mandatory. The court does not assess the merits or the likelihood of settlement before referring, the referral is procedural and automatic for qualifying cases. Early indications suggest judges are applying this mechanically rather than exercising residual discretion, which aligns with the legislative intent to make referral systematic rather than selective.

Practical Compliance Checklist, How to Prepare for Mandatory Mediation Construction Poland 2026

Compliance is not a single action, it spans the full project lifecycle. The following numbered checklist is organised by phase to help contractors, developers and their counsel prepare systematically.

Phase 1, Pre-Contract Due Diligence

1. Audit existing contract templates. Review all standard-form and bespoke construction contracts for existing ADR clauses, escalation mechanisms and mediation provisions. Flag any that lack a mediation step or that reference outdated procedural rules. For a glossary of key terms used in construction contracts, consult our construction law glossary.
2. Assess insurance coverage. Check whether professional indemnity and contractor’s all-risk policies cover mediation costs. Some policies require notification before entering ADR, update notification protocols accordingly.
3. Build a mediator shortlist. Identify qualified mediators with construction-sector experience. Use lists maintained by the Polskie Centrum Mediacji and regional courts. Include at least three candidates with relevant technical backgrounds.
4. Train site teams. Project managers, contract administrators and site engineers need to understand that disputes may now be referred to mediation before court. Conduct a 60-minute briefing covering: what mediation involves, how to preserve evidence, and who to escalate to internally.

Phase 2, Contract Redrafting Checklist for ADR in Polish Construction Contracts

This is the most critical compliance step. Every new construction contract signed after 1 March 2026, and ideally every live contract where amendment is possible, should include or be updated with the following elements:

1. Multi-tier escalation clause. Require negotiation between senior representatives before mediation, and mediation before litigation or arbitration.
2. Nominated mediator pool. Specify how a mediator will be selected (e.g., from a named institution list, by agreement, or by court appointment as fallback).
3. Mediation timeline. Set a maximum period for mediation (e.g., 60 days from referral) to prevent indefinite delays.
4. Notice requirements. Define how a party invokes mediation, written notice, minimum content, and response deadlines.
5. Confidentiality protections. Include an express confidentiality clause covering all mediation communications, documents and offers.
6. Cost allocation. State who bears the mediator’s fees and how costs are shared (equal split is common practice; the clause should address reallocation if one party refuses to participate).
7. Language and seat. Specify the language of mediation and the physical or virtual location where sessions will take place.
8. Arbitration or litigation trigger. Define the conditions under which mediation is deemed concluded and the dispute may proceed to arbitration or court, typically non-settlement after a specified period or a mediator’s declaration of impasse.

Phase 3, Operational Workflows at Dispute Onset

1. Internal notification. When a dispute arises, immediately notify the project director, in-house counsel and (if applicable) the insurer. Create a standardised dispute notification template that triggers the mediation workflow.
2. Evidence preservation. From day one of a dispute, begin compiling: site diaries, correspondence, variation orders, payment certificates, photographs, and programme records. Organise into a mediation bundle indexed chronologically.
3. Mediation request letter. Draft and send a mediation request to the counterparty within the contractual notice period. The letter should reference the contract clause, the 2026 amendment, and propose mediator candidates and dates.
4. Settlement authority. Ensure that the person attending mediation has authority to settle within defined financial parameters. Lack of authority wastes the session and may be noted by the mediator in their court report.

Ready actions, next 30 days:

• Circulate updated mediation clause template to all contract managers.
• Schedule mediator-selection meeting with legal team.
• Issue internal memo explaining the 2026 amendment and its impact on project-level dispute handling.
• Review and update all pending tender documentation to include compliant ADR clauses.

Sample Mediation Clause Templates and Annotated Drafting Notes

A well-drafted mediation clause template for Polish construction contracts is now essential. Below are two model clauses. These are provided as legal drafting assistance, parties should seek qualified counsel before incorporating them into binding agreements.

Template A, Standard Commercial Mediation-First Clause

“Any dispute arising out of or in connection with this Contract, including any question regarding its existence, validity or termination, shall first be referred to mediation in accordance with the provisions of the Polish Code of Civil Procedure. The parties shall jointly appoint a mediator from [named institution/list] within 14 days of a written mediation request. The mediation shall be conducted in [Polish/English] at [city/seat]. If the dispute is not settled within 60 days of the mediator’s appointment, either party may commence court proceedings or refer the dispute to arbitration as provided in Clause [X].”

Drafting notes:

• “First be referred to mediation”, establishes mediation as a contractual condition precedent, aligning with the statutory obligation.
• “14 days”, provides a reasonable window to agree on a mediator; prevents tactical delay.
• “60 days”, sets a hard stop; avoids mediation becoming a procedural parking exercise. Adjust to project complexity.
• Fallback to court or arbitration, preserves the right to escalate and prevents the clause from being treated as an absolute bar to proceedings.

Template B, Mediation with Arbitration Trigger

“Prior to commencing arbitration under Clause [Y], the parties shall attempt to resolve the dispute through mediation. The mediation shall be initiated by written notice from the claiming party and shall be conducted in accordance with the rules of [named mediation institution]. The mediator’s fees shall be borne equally by the parties unless otherwise agreed. If no settlement is reached within 45 days of the mediator’s appointment, or if either party fails to participate in good faith, the dispute shall be referred to arbitration under the rules of [named arbitral institution] with its seat in [city].”

Drafting notes:

• “Prior to commencing arbitration”, makes mediation a pre-condition to arbitration, which is the recommended approach where an arbitration clause already exists.
• “Fails to participate in good faith”, provides a clear trigger if one party attempts to frustrate the process.
• Cost-sharing default, equal split is market standard in Poland; the clause can be adjusted for asymmetric fee arrangements.

Pitfalls to avoid: Do not use vague language like “the parties may consider mediation”, this will not satisfy the statutory framework. Avoid setting mediation timelines shorter than 30 days, as courts may view this as a sham compliance step.

Timelines, Costs, Evidence and What Happens If Mediation Fails

The procedural flow from filing to mediation to resolution follows a defined sequence. Understanding timelines and costs is essential for budgeting and project planning under the obligatory mediation Poland framework.

Costs, What to Budget

Mediator fees in Poland for construction disputes vary based on the value in dispute and the mediator’s experience. Industry observers note that court-appointed mediators follow statutory fee schedules, while private mediators engaged through institutions may charge higher rates reflective of their construction expertise. The likely practical effect for most mid-size construction disputes is that mediation costs will represent a fraction of full litigation expenses, but they must be budgeted for nonetheless.

Procedural Consequences of Non-Participation

Ignoring or boycotting the mediation referral carries real risks. While a party cannot be physically compelled to attend, the court may:

• Draw adverse inferences when allocating litigation costs, a non-participating party may be ordered to bear a larger share of costs regardless of the substantive outcome.
• Note non-cooperation in the judgment, the mediator’s report, which is filed with the court, will record non-attendance.
• Delay the case, if referral conditions are not met, the court may stay proceedings until the mediation step is completed or formally concluded.

Documenting Good-Faith Participation, Evidence Checklist

• Written confirmation of attendance at all scheduled sessions.
• Copies of position statements and supporting documents submitted to the mediator.
• Record of any settlement offers made or considered.
• Mediator’s report confirming participation and outcome.
• Internal authority documentation showing the attendee had power to settle.

Arbitration, Existing Arbitration Clauses and Interplay with Mandatory Mediation

Existing arbitration clauses remain enforceable. The 2026 amendment does not override contractual arbitration agreements. However, the recommended approach is to layer a mediation-first step before the arbitration trigger. This ensures compliance with the statutory framework while preserving the efficiency benefits of arbitration. For a deeper comparison of these mechanisms, see our guide to the 11 key differences between arbitration and litigation.

The likely practical effect is that parties with pure arbitration clauses will still be able to proceed, but industry observers expect courts to view a mediation-first step favourably, and its absence unfavourably, when exercising their residual discretion on costs and procedural matters. For practical guidance on preparing for hearings that may follow mediation, consult our notes on arbitration hearings, preparation and conduct.

Practical Negotiation and Mediation Strategy for Contractors

Mediation is only as effective as the preparation behind it. These strategic tips help contractors and developers extract maximum value from the mandatory mediation step:

• Prepare a concise case summary. Distil the dispute into a 2–3 page position paper with key dates, amounts and supporting documents. Avoid producing volumes of evidence, mediators value clarity over volume.
• Know your settlement range. Before attending, establish a realistic settlement zone: the minimum acceptable outcome, the ideal outcome, and the walk-away point. Obtain board or shareholder approval for the range.
• Consider interim relief separately. If urgent protective measures are needed (e.g., to prevent demolition or secure payment), apply for interim relief through the court independently, this is excluded from the mandatory mediation referral.
• Preserve the commercial relationship. Construction projects often involve ongoing contractual relationships. Use mediation as an opportunity to negotiate future cooperation terms alongside the specific dispute.
• Prepare a mediation-day checklist: confirm attendee authority, bring all supporting documents, have contact details for absent decision-makers who may need to be consulted during the session, and allocate a full day without competing commitments.

Implementation Checklist for In-House Legal Teams and Site Managers

For organisations managing multiple construction projects across Poland, systematic implementation of the 2026 changes is essential. Use this operational checklist:

1. Issue a compliance memo. Distribute a one-page internal notice explaining the Code of Civil Procedure amendment 2026, who is affected, and what changes to expect in dispute handling.
2. Update dispute-escalation matrices. Add a mandatory mediation step in internal escalation flowcharts between “senior management negotiation” and “issue court proceedings.”
3. Nominate a mediation coordinator. Designate one person (typically in-house counsel or a senior contract manager) as the point of contact for all mediation referrals.
4. Conduct training sessions. Schedule 60-minute workshops for contract managers and project directors covering mediation basics, evidence preservation and the new e-filing requirements.
5. Maintain a mediator register. Keep an updated list of approved mediators with construction expertise, including their fee structures, availability, and language capabilities.
6. Review e-filing readiness. Ensure that legal teams have access to the court’s electronic filing system and are trained on how to submit mediation reports and related documents digitally.

Practical Annexes and Downloads

The following resources support compliance with the mandatory mediation construction Poland 2026 framework. Templates are provided as legal drafting assistance and should be reviewed by qualified counsel before use in binding agreements.

• Mediation clause pack. Includes Template A (mediation-first, litigation fallback) and Template B (mediation-first, arbitration trigger), reproduced in full above and available as a copyable text resource.
• Mediation request letter template. A model letter initiating contractual mediation, referencing the 2026 amendment and proposing mediator candidates, available for download by contacting Global Law Experts.
• Evidence preservation checklist. A single-page checklist for site managers listing documents to compile from day one of a dispute: site diaries, correspondence, payment certificates, photographs, programme records and variation orders.
• Mediator shortlist template. A register format for maintaining an approved list of construction mediators, including fields for institution affiliation, fee rates, language capabilities, availability and construction specialisms.

For bespoke mediation clause drafting, dispute preparation support or questions about ADR in Polish construction contracts, consult a qualified Polish dispute resolution lawyer through the Global Law Experts directory.

Sources

1. Rządowe Centrum Legislacji, Legislative project 12406607 (Code of Civil Procedure amendment)
2. Ministry of Justice (Ministerstwo Sprawiedliwości), Public statement on mediation reform
3. Dudkowiak & Putyra, Mandatory mediation in construction disputes: amendments effective 1 March 2026
4. Hoogells, New law, old realities: mediation in construction disputes
5. NGL Legal, Dispute resolution: court submissions in electronic form and new laws on mediation (PDF)
6. JKLAW, Obligatory mediation in construction disputes: what do the amendments change?
7. Poland Insight, Mandatory mediation in construction disputes to begin in Poland in March 2026
8. Polskie Centrum Mediacji, Professional mediation community commentary
9. Eversheds Sutherland, Changes to the construction law in Poland