International Construction Arbitration in Turkey

International construction arbitration in Turkey is an increasingly important method of resolving disputes arising from infrastructure, energy, industrial, transport, real estate and engineering projects involving Turkish and foreign parties.

Large construction projects commonly involve employers, contractors, subcontractors, engineers, consultants, lenders, public authorities, insurers, suppliers and project companies from different jurisdictions. The relevant contracts may be governed by Turkish law or foreign law and may incorporate international standard forms such as the FIDIC Conditions of Contract.

Construction disputes are often technically complex, document-intensive and commercially urgent. They may involve thousands of project records, competing delay analyses, expert evidence, revised work programmes, variation instructions, payment certificates, design responsibilities and allegations of defective performance.

Ordinary court litigation may not always provide the flexibility, confidentiality, technical expertise or international enforceability required for these disputes. Arbitration allows the parties to select specialist arbitrators, determine the language and seat of proceedings, adopt institutional rules and present complex technical evidence within a procedure designed for the project.

Where Turkey is selected as the seat and the dispute contains a foreign element, International Arbitration Law No. 4686 generally provides the procedural legal framework. The law regulates arbitration agreements, tribunal constitution, interim protection, evidence, expert examination, applicable law, arbitral awards and setting-aside proceedings.

This article explains the legal framework for international construction arbitration in Turkey, common claims, FIDIC dispute procedures, delay and quantum evidence, interim measures, public projects, ISTAC proceedings and enforcement of arbitral awards.

Why Is Arbitration Common in International Construction Projects?

Construction contracts are particularly suitable for arbitration because project disputes frequently combine legal, engineering, programming and financial questions.

A single arbitration may require the tribunal to determine:

• Whether the employer delayed access to the site;
• Whether the contractor submitted valid contractual notices;
• Whether design information was issued late;
• Whether an instruction constituted a variation;
• Whether an event affected the critical path;
• Whether concurrent delay existed;
• Whether the contractor is entitled to an extension of time;
• Whether prolongation costs were proved;
• Whether liquidated damages may be deducted;
• Whether the works were defective;
• Whether the employer wrongfully terminated the contract;
• Whether a performance bond was called lawfully;
• Whether payment certificates or retention amounts remain unpaid.

The tribunal may therefore need arbitrators experienced in construction contracts and experts specialising in delay, engineering, valuation or quantum.

Arbitration also allows the parties to choose a neutral forum. A foreign contractor may be reluctant to litigate exclusively before the employer’s national courts, while a Turkish employer may prefer not to litigate in the contractor’s home jurisdiction. Selecting a neutral seat, institution and tribunal may reduce concerns about home-court advantage.

International enforceability is another important consideration. The New York Convention requires contracting states to recognise qualifying arbitration agreements and generally enforce foreign or non-domestic arbitral awards subject to limited refusal grounds.

What Makes a Construction Arbitration “International” in Turkey?

A construction dispute may qualify as international even where the project itself is located entirely in Turkey.

Under Law No. 4686, a foreign element may arise where:

• The parties have domiciles, habitual residences or places of business in different states;
• A substantial part of the contractual obligations will be performed outside the parties’ common state;
• The legal relationship is most closely connected with another country;
• Foreign capital has been introduced in connection with the project;
• Foreign financing or guarantees are required;
• The contract results in cross-border movements of goods or capital.

An arbitration between two Turkish companies may therefore contain a foreign element where the project depends on international finance, foreign investment, imported equipment or cross-border commercial performance.

The existence of an international project does not automatically mean that Law No. 4686 applies. The seat of arbitration and the parties’ contractual choices must also be examined.

Where the dispute lacks a foreign element and Turkey is the seat, the domestic arbitration provisions of the Turkish Code of Civil Procedure may apply instead.

The Legal Framework for Construction Contracts under Turkish Law

Where Turkish substantive law governs the construction contract, the project relationship may fall within the provisions concerning contracts for work under the Turkish Code of Obligations No. 6098.

Article 470 defines a contract for work as an agreement under which the contractor undertakes to create a work and the employer undertakes to pay the corresponding price. The Code regulates matters such as the contractor’s duties, material and design issues, defects, acceptance, price, employer responsibilities, termination and the consequences of extraordinary events.

However, major international construction contracts are rarely governed only by the statutory provisions. The parties ordinarily establish detailed contractual systems addressing:

• Scope and technical specifications;
• Design responsibility;
• Commencement and completion dates;
• Work programmes;
• Variations;
• Payment certification;
• Extensions of time;
• Testing and commissioning;
• Taking over;
• Defects notification;
• Bonds and guarantees;
• Insurance;
• Termination;
• Claims and notices;
• Dispute boards;
• Arbitration.

The tribunal must analyse the contract as a whole, including its general conditions, particular conditions, technical documents, bills of quantities, drawings, schedules and subsequent amendments.

Drafting an Effective Construction Arbitration Clause

An enforceable arbitration clause is the foundation of the tribunal’s jurisdiction.

The clause should clearly demonstrate that arbitration is mandatory rather than optional. It should identify:

• The arbitration institution or ad hoc rules;
• The legal seat of arbitration;
• The number of arbitrators;
• The language;
• The substantive governing law;
• The law governing the arbitration agreement, where appropriate;
• The scope of disputes;
• Any dispute board or negotiation requirements;
• Interim and emergency relief mechanisms;
• Consolidation and joinder issues.

A general statement that disputes “may be submitted to arbitration” can create uncertainty. The clause should ordinarily state that disputes shall be finally resolved by arbitration.

Where ISTAC is selected, the official model clause provides that disputes arising out of or connected with the contract will be finally settled under the ISTAC Arbitration Rules. ISTAC recommends that parties separately determine the seat, language, number of arbitrators and law applicable to the merits.

A construction arbitration clause may state:

“Any dispute, controversy or claim arising out of or relating to this Contract, including its formation, interpretation, performance, breach, termination or validity, shall be finally resolved by arbitration administered by the Istanbul Arbitration Centre under the ISTAC Arbitration Rules. The seat of arbitration shall be Istanbul, Türkiye. The tribunal shall consist of three arbitrators. The language of arbitration shall be English. The Contract and the arbitration agreement shall be governed by Turkish law.”

This wording should be adapted to the project and the complete contractual dispute mechanism.

FIDIC Contracts in Turkish Construction Projects

FIDIC forms are widely used in international construction and engineering projects.

The main FIDIC forms include:

• The Red Book for works predominantly designed by the employer;
• The Yellow Book for plant and design-build projects where the contractor generally undertakes design responsibility;
• The Silver Book for EPC and turnkey projects with greater risk allocated to the contractor;
• The Green Book for shorter and less complex projects;
• The Emerald Book for underground works.

FIDIC currently maintains both the widely used 1999 editions and the second-edition 2017 Red, Yellow and Silver Books, which were reprinted in 2022 with amendments.

The use of a FIDIC form does not mean that every contract contains the standard FIDIC risk allocation. Employers and contractors frequently make extensive changes through Particular Conditions.

Those amendments may alter:

• Notice periods;
• Design risk;
• Ground conditions;
• Employer claims;
• Extension-of-time entitlements;
• Payment procedures;
• Liability limitations;
• Force majeure or exceptional-event provisions;
• Dispute board requirements;
• Governing law;
• Arbitration procedure.

A tribunal must therefore analyse the signed contract rather than assuming that the unamended standard form applies.

FIDIC’s Golden Principles emphasise that Particular Conditions should be drafted clearly and should not fundamentally undermine the balance of the standard form. They also recognise dispute board referral as a condition preceding arbitration unless inconsistent with the governing law.

Notices and Contractual Time Bars

Notice provisions are among the most important and frequently disputed aspects of construction contracts.

A contractor may be required to notify the employer or engineer within a specified period after becoming aware of an event affecting time or cost. Failure to comply may result in the claim being barred, depending on:

• The wording of the clause;
• The governing law;
• The identity and authority of the recipient;
• Whether the notice clearly identified the event;
• Whether the employer had actual knowledge;
• Whether strict reliance on the time bar is compatible with good faith;
• Whether the employer suffered evidentiary prejudice;
• Whether later correspondence preserved the claim.

The tribunal may need to determine whether an email, progress report, meeting minute, programme update or request for information constituted a valid notice.

Claims teams should avoid relying on informal project communications alone. Notices should identify the contractual provision, event, expected effect and reservation of rights. The contractor should also comply with follow-up requirements for detailed particulars and updated assessments.

The 2017 FIDIC forms introduced more detailed claim-management provisions and place significant emphasis on notices, determinations and formal disagreement procedures.

Delay and Extension-of-Time Claims

Delay claims are among the most complex issues in international construction arbitration.

A contractor seeking an extension of time must ordinarily prove:

1. A contractually relevant delaying event occurred;
2. The event was attributable to the employer or otherwise entitled the contractor to relief;
3. The event affected activities on the project’s critical path;
4. The delay affected the contractual completion date;
5. The contractor complied with notice and substantiation requirements;
6. The claimed extension was not eliminated by contractor-responsible delay or mitigation.

Common employer-risk delay events include:

• Late site possession;
• Delayed drawings or approvals;
• Employer variations;
• Changes to access arrangements;
• Unforeseen utility conflicts;
• Suspension instructed by the employer;
• Delayed permits allocated to the employer;
• Interference by other contractors;
• Failure to provide employer-supplied materials;
• Changes in law, where contractually compensable.

The tribunal must distinguish between delay to an activity and delay to project completion. An event affecting a non-critical activity may not justify an extension where sufficient float existed.

Delay Analysis Methods

Delay experts may use different methodologies depending on the records, contract and project circumstances.

Common methods include:

• As-planned versus as-built analysis;
• Impacted as-planned analysis;
• Time-impact analysis;
• Windows analysis;
• Time-slice or contemporaneous-period analysis;
• Collapsed as-built analysis.

No single method is automatically correct for every dispute.

The reliability of an analysis depends on:

• The quality of the baseline programme;
• Whether programme updates were regularly prepared;
• Whether logic links reflect actual construction;
• Whether progress data is accurate;
• Whether the expert has considered resequencing;
• Whether mitigation and acceleration were analysed;
• Whether the method corresponds to the question the tribunal must answer.

A sophisticated expert model cannot compensate for unreliable factual data. The tribunal may prefer contemporaneous project documents over an analysis created only after the dispute arose.

Concurrent Delay

Concurrent delay occurs where delay events attributable to different parties operate during the same or overlapping periods and affect completion.

The consequences may depend on:

• The governing law;
• The precise contractual wording;
• Whether the events were genuinely critical;
• Whether they occurred simultaneously;
• Whether one event would have delayed completion independently;
• Whether the claim concerns time, money or both.

The tribunal should avoid assuming that every overlap constitutes legal concurrency.

For example, contractor delay to one area and employer delay to another may not be concurrent if only one activity controlled completion. A detailed critical-path analysis is usually required.

Contracts should address the consequences of concurrent delay expressly where possible, particularly in EPC projects where the financial consequences of delay may be substantial.

Prolongation Costs and Disruption Claims

An extension of time does not automatically establish entitlement to every financial consequence claimed by the contractor.

Prolongation costs may include:

• Site management;
• Temporary facilities;
• Security;
• Equipment;
• Utilities;
• Insurance;
• Site accommodation;
• Extended guarantees;
• Head-office overhead contributions.

The contractor must ordinarily establish both entitlement and causation. It should demonstrate that the compensable delay caused the additional expenditure and that the amount was reasonably incurred.

Disruption differs from delay. A project may finish on time but require inefficient performance due to frequent changes, resequencing, overcrowding, loss of productivity or fragmented work.

A disruption claim may require:

• Labour records;
• Productivity data;
• Planned and actual resource comparisons;
• Daily reports;
• Variation records;
• Area-based analysis;
• A measured-mile comparison;
• Evidence excluding contractor inefficiency.

Global claims that present a single total cost without a reliable causal connection between individual events and loss may face significant evidentiary difficulties.

Variations and Additional Works

Variation disputes frequently concern whether an instruction changed the contractual scope.

A tribunal may need to determine:

• Whether the instruction was issued by an authorised person;
• Whether the work was already included in the original scope;
• Whether the contractor provided the required notice;
• Whether the employer accepted or benefited from the additional work;
• How the variation should be valued;
• Whether existing rates remain applicable;
• Whether a new rate should be created;
• Whether the variation affected time as well as cost.

Construction personnel often proceed with work before the price is agreed to avoid project delay. This creates later disputes concerning valuation and contractual authority.

The contractor should preserve:

• Written instructions;
• Requests for variation;
• Technical explanations;
• Quantity calculations;
• Labour and equipment records;
• Quotations;
• Engineer determinations;
• Programme impacts;
• Reservations of rights.

The Turkish Code of Obligations may also become relevant where Turkish substantive law governs and the parties’ detailed contract does not resolve the valuation issue.

Payment, Certification and Retention Disputes

Payment disputes may involve:

• Uncertified work;
• Under-certified quantities;
• Deducted variations;
• Retention;
• Advance-payment recovery;
• Set-off;
• Defect deductions;
• Price escalation;
• Currency conversion;
• Final account disagreements;
• Interest on delayed payments.

The existence of an engineer’s or consultant’s certificate may be evidentially significant, but its legal effect depends on the contract.

The tribunal may examine whether:

• Certification was a condition of payment;
• The certifier acted within its authority;
• The certificate was temporary or final;
• The employer may challenge certified sums;
• Payment was withheld for a valid reason;
• The certifier acted impartially or contractually;
• The final account process was completed.

Where a contractor claims the entire unpaid contract balance, the tribunal may still require project-level evidence showing the work completed, applicable rates and contractual deductions.

Defects and Non-Conforming Work

Defect disputes may concern design, materials, workmanship, testing or failure to satisfy performance guarantees.

The employer may seek:

• Rectification costs;
• Replacement;
• Diminution in value;
• Delay-related loss;
• Consequential damages;
• Costs of third-party repair;
• Extension of the defects period;
• Recovery under a performance guarantee.

The contractor may argue that:

• The work complied with the specification;
• The employer’s design caused the problem;
• The employer failed to maintain or operate the facility correctly;
• The alleged defect falls within an accepted tolerance;
• The contractor was denied access to remedy the defect;
• The proposed replacement is disproportionate;
• The employer failed to mitigate loss.

Expert evidence is usually essential. The expert should distinguish between technical non-compliance, functional failure and aesthetic dissatisfaction.

The contract may also establish inspection, notification and cure procedures that must be completed before damages or third-party repair costs are claimed.

Termination and Suspension Disputes

Termination is one of the most serious events in a construction project.

Employers may terminate for reasons such as:

• Abandonment;
• Failure to proceed regularly;
• Persistent defective work;
• Insolvency;
• Failure to provide security;
• Serious delay;
• Corruption or prohibited conduct.

Contractors may terminate or suspend due to:

• Prolonged non-payment;
• Extended suspension;
• Failure to provide access;
• Employer insolvency;
• Fundamental prevention of performance.

The tribunal must analyse whether:

• A contractual ground existed;
• Required notices were served;
• Cure periods expired;
• The terminating party acted proportionately and in good faith;
• The breach was sufficiently serious;
• The termination mechanism was followed precisely;
• The termination itself was repudiatory or wrongful.

The financial consequences may include the value of completed work, demobilisation, replacement-contractor costs, lost profit, bond proceeds, unpaid certificates and damages for wrongful termination.

Performance Bonds and Advance-Payment Guarantees

International construction projects frequently use on-demand bank guarantees.

Disputes may arise when the employer calls:

• A performance bond;
• An advance-payment guarantee;
• A retention bond;
• A parent-company guarantee.

The contractor may seek an urgent order preventing payment, particularly where it alleges that the call is fraudulent, abusive or inconsistent with express guarantee conditions.

These disputes are difficult because the guarantee may be legally independent from the construction contract. The rights of the issuing bank must be distinguished from the parties’ underlying contractual dispute.

An arbitral tribunal can issue measures directed at the contracting parties, but it cannot ordinarily bind a third-party bank directly under Turkish arbitration law. Court assistance may therefore be required where a bank or public authority must be bound. Law No. 4686 permits parties to seek court-ordered interim protection without waiving arbitration.

Interim Measures in Construction Arbitration

Urgent relief may be required to:

• Preserve project records;
• Prevent destruction or alteration of evidence;
• Protect confidential designs;
• Preserve machinery or materials;
• Prevent disposal of project assets;
• Maintain site access;
• Secure a monetary claim;
• Prevent an allegedly unlawful bond call;
• Preserve the status quo pending tribunal determination.

Under Law No. 4686, a party may apply to a Turkish court for an interim injunction or interim attachment before or during arbitration. Such an application is not inconsistent with the arbitration agreement.

The tribunal may also order interim relief unless the parties have agreed otherwise. However, it cannot directly impose coercive measures requiring enforcement authorities, public bodies or third parties to act.

Where ISTAC rules apply, emergency arbitrator relief may be available before the ordinary tribunal is constituted. ISTAC states that the emergency arbitrator is appointed within two working days and renders a decision within seven days.

The applicant should select the forum based on the type of relief required. A court is generally more effective where the order must bind a bank, registry or third party.

Dispute Boards under FIDIC Contracts

FIDIC contracts commonly use dispute boards as part of a multi-tier dispute resolution procedure.

The 1999 forms generally refer to a Dispute Adjudication Board, while the 2017 forms strengthen the role of the standing Dispute Avoidance/Adjudication Board.

A dispute board may:

• Become familiar with the project while work is continuing;
• Assist the parties in avoiding disputes;
• Receive formal dispute referrals;
• Review factual and technical evidence;
• Issue a contractually binding decision;
• Reduce the number of issues later submitted to arbitration.

FIDIC’s Golden Principles treat referral of formal disputes to the dispute board as a condition precedent to arbitration unless that requirement conflicts with the governing law.

A party dissatisfied with a dispute board decision may need to issue a Notice of Dissatisfaction within the contractual period. Under commonly used FIDIC structures, failure to issue a timely notice may cause the decision to become final and binding. Where a valid notice is issued, the underlying dispute may later be reopened and finally determined in arbitration.

Before commencing arbitration, counsel should determine:

• Whether a dispute board was validly constituted;
• Whether referral was mandatory;
• Whether the board issued a decision;
• Whether a Notice of Dissatisfaction was timely and sufficiently specific;
• Whether an amicable-settlement period applied;
• Whether the board decision must be complied with pending arbitration;
• Whether the arbitration concerns the underlying merits or enforcement of the board decision.

Failure to follow the multi-tier procedure may produce jurisdictional or admissibility objections.

Evidence in Construction Arbitration

Construction arbitration is typically won or lost through project records.

Important evidence may include:

• Contract documents;
• Drawings and specifications;
• Bills of quantities;
• Baseline and updated programmes;
• Daily and weekly reports;
• Site diaries;
• Progress photographs;
• Building information models;
• Requests for information;
• Variation instructions;
• Meeting minutes;
• Payment applications;
• Certificates;
• Cost ledgers;
• Labour and equipment records;
• Testing results;
• Correspondence;
• Notices;
• Handover and acceptance documents.

Documents created contemporaneously with the project usually carry greater weight than retrospective accounts prepared after the dispute.

Project teams should preserve digital metadata and maintain a clear document-management system. Uncontrolled revisions, missing schedules and inconsistent document numbering can materially weaken a claim.

Expert Evidence

Expert evidence commonly falls into four categories:

Delay Experts

Delay experts analyse work programmes, critical paths, event chronology and responsibility for completion delay.

Quantum Experts

Quantum experts assess variation values, prolongation costs, disruption, financing losses, damages, final accounts and interest.

Technical Experts

Engineers, architects and specialists analyse defects, design responsibility, workmanship, geotechnical conditions, mechanical performance or testing.

Legal Experts

Where the tribunal does not have direct expertise in the governing law, parties may submit expert evidence on Turkish law or another foreign law.

Experts owe their professional analysis to the tribunal rather than acting merely as advocates. Reports should explain assumptions, methodology, source documents and limitations.

The tribunal may also appoint its own expert under the Turkish International Arbitration Law and may seek judicial assistance in collecting evidence.

BIM, Digital Evidence and Emerging Disputes

Modern construction disputes increasingly involve Building Information Modelling, common data environments, digital schedules, electronic site records, drones, automated monitoring and project-management platforms.

Digital evidence may help identify:

• When a model was revised;
• Who issued a design change;
• Whether a clash was identified;
• When information became available;
• Whether programme logic was altered retrospectively;
• Whether progress reports match physical conditions.

However, digital evidence also creates questions of authenticity, access rights, version control, cybersecurity and data completeness.

ISTAC’s March 2026 programme on new trends in international construction arbitration specifically identified digitalisation, BIM, digital evidence, ESG-related disputes and emerging approaches to delay and quantum as important current topics.

Contracts should allocate responsibility for maintaining project data, granting access, retaining versions and preserving records after completion or termination.

Public Construction Projects in Turkey

Public construction projects may be subject to the Public Procurement Law No. 4734, the Public Procurement Contracts Law No. 4735, standard tender documents and project-specific administrative specifications.

Law No. 4735 regulates contracts resulting from procurement procedures conducted under the Public Procurement Law.

Public construction contracts may involve mandatory rules concerning:

• Contract amendments;
• Additional works;
• Price differences;
• Assignment;
• Termination;
• Performance guarantees;
• Acceptance;
• Sanctions;
• Procurement restrictions.

Certain disagreements concerning public construction contract implementation may also fall within the functions assigned by legislation to the High Technical Board, including issues involving unpriced work, inconsistencies between tender documents, work programmes, price differences, extensions of time, acceptance, delay penalties and additional or reduced work.

The arbitrability of a public project dispute must be examined carefully. A private contractual payment dispute differs from a challenge to an administrative act or public-law sanction.

The Turkish Constitution permits national or international arbitration to be stipulated in public service concession contracts. International arbitration may be selected in concession disputes containing a foreign element.

Multiparty and Multicontract Construction Disputes

Construction projects rarely operate under a single contract.

The contractual network may include:

• Employer–main contractor agreements;
• Subcontracts;
• Design agreements;
• Equipment-supply contracts;
• Project-management agreements;
• Financing documents;
• Guarantees;
• Joint venture agreements;
• Insurance policies.

A defect or delay may involve several of these relationships.

Difficulties arise where the contracts contain inconsistent arbitration clauses. One may select ISTAC arbitration in Istanbul, another foreign arbitration and another Turkish courts.

Before signing, the project parties should align:

• Arbitration institution;
• Seat;
• Language;
• Number of arbitrators;
• Governing law;
• Consolidation;
• Joinder;
• Dispute board procedures.

Without compatible clauses, related disputes may proceed in separate forums, creating duplicated evidence and inconsistent findings.

A main contractor should not assume that a subcontractor is bound by the arbitration clause in the main contract merely because the subcontract relates to the same project.

ISTAC Construction Arbitration

ISTAC administers domestic and international arbitrations where the parties have agreed to use its rules.

ISTAC proceedings may be suitable for Turkish construction disputes because the parties can select:

• Turkish or English as the procedural language;
• A sole arbitrator or three-member tribunal;
• Arbitrators with construction expertise;
• Istanbul or another location as the seat;
• Turkish or foreign substantive law.

ISTAC also provides:

• Emergency arbitrator procedures;
• Fast-track arbitration;
• Online hearing procedures;
• Published cost scales;
• Hearing-room services.

Its online hearing framework permits arbitration hearings to be conducted through video or teleconference, which may be particularly useful where experts, witnesses and project personnel are located in different countries.

The current Fast Track Arbitration system applies to qualifying lower-value disputes and aims to produce an award within three months through a sole arbitrator. The applicable monetary threshold and current rules should always be verified at the commencement date.

Choosing the Arbitral Tribunal

A construction tribunal should collectively possess the legal, procedural and technical ability required for the dispute.

Relevant experience may include:

• FIDIC contracts;
• Turkish construction law;
• Delay analysis;
• EPC risk allocation;
• Public projects;
• Energy facilities;
• Infrastructure;
• International arbitration procedure;
• Expert evidence;
• Quantum assessment.

A technically qualified arbitrator is not automatically preferable to a legally experienced arbitrator. Complex disputes often require both.

For a three-member tribunal, the parties may seek a balanced composition involving:

• A chair with substantial arbitration experience;
• A member familiar with the governing law;
• A member with construction-sector knowledge.

Availability should be examined carefully. An internationally known arbitrator who cannot devote sufficient time may cause delay in an already document-intensive case.

Setting Aside a Turkish-Seated Construction Award

An award rendered in an international arbitration seated in Turkey may be challenged under Article 15 of Law No. 4686.

Potential grounds include:

• Invalidity of the arbitration agreement;
• Irregular tribunal constitution;
• Excess of jurisdiction;
• Failure to follow the agreed procedure;
• Violation of equality;
• Failure to render the award within the applicable period;
• Non-arbitrability;
• Conflict with Turkish public policy.

The setting-aside procedure is not a full appeal on the merits. A party cannot ordinarily obtain annulment merely because it disputes the tribunal’s delay analysis, valuation method or interpretation of technical evidence.

The action must generally be filed within 30 days from notification of the award or the relevant post-award decision. Filing the action suspends enforcement under the statutory regime.

Construction parties should pay particular attention to the statutory arbitration period. Unless otherwise agreed, Law No. 4686 provides a default one-year period for rendering the award. Complex construction cases should address extensions expressly to avoid later challenges.

Enforcement of Construction Arbitral Awards

A Turkish-seated award may be enforced abroad under the New York Convention in a contracting state, subject to the Convention’s requirements.

A foreign-seated construction award may similarly be recognised and enforced against assets in Turkey.

Enforcement may be refused only on limited grounds, including:

• Invalid arbitration agreement;
• Lack of proper notice;
• Inability to present the case;
• Excess of jurisdiction;
• Irregular tribunal constitution or procedure;
• Award not yet binding;
• Annulment or suspension at the seat;
• Non-arbitrability;
• Public policy.

The enforcing court should not reconsider the tribunal’s findings on delay, defects, variations or damages merely because it would have assessed the evidence differently. The New York Convention aims to prevent discriminatory treatment of foreign awards and to facilitate their recognition and enforcement.

Before commencing arbitration, the claimant should investigate where the respondent’s assets are located. An award is commercially valuable only if it can be converted into actual recovery.

Common Mistakes in Construction Arbitration

The most frequent strategic mistakes include:

• Using an ambiguous arbitration clause;
• Ignoring dispute board prerequisites;
• Missing notice deadlines;
• Failing to issue a valid Notice of Dissatisfaction;
• Relying on an unreliable baseline programme;
• Failing to preserve programme updates;
• Submitting global claims without causation;
• Treating every variation as a critical delay;
• Failing to separate delay from disruption;
• Claiming prolongation costs without accounting evidence;
• Using experts as advocates;
• Ignoring inconsistent clauses in related contracts;
• Waiting until termination to organise project documents;
• Requesting relief against non-parties;
• Failing to investigate enforceable assets.

Effective construction arbitration begins during project administration, not after the arbitration request is filed.

Practical Construction Dispute Checklist

Before commencing arbitration, counsel should determine:

• Which contract version and amendments apply;
• Whether the arbitration clause is valid;
• Whether the dispute contains a foreign element;
• The seat, institution and governing law;
• Whether the dispute board procedure was completed;
• Whether notices were issued on time;
• Whether limitation periods remain open;
• Which programme controlled the works;
• Whether critical-path delay can be proved;
• Whether concurrent delay exists;
• Whether cost records support the quantum claim;
• Whether all necessary parties are bound by arbitration;
• Whether interim relief is required;
• Whether project records and digital evidence are preserved;
• Which experts are required;
• Where the opposing party’s assets are located;
• Whether an eventual award will be enforceable.

Frequently Asked Questions

Can international construction disputes in Turkey be resolved by arbitration?

Yes. Contractual construction disputes concerning rights over which the parties may freely dispose are generally capable of arbitration. The validity and scope of the arbitration agreement must still be examined.

Must Turkish law govern the contract?

No. The parties may choose another substantive law while selecting Turkey as the seat. The seat, institution and substantive governing law are separate matters.

Are FIDIC contracts automatically governed by English law?

No. FIDIC forms do not automatically determine the governing law. The parties must state the applicable law in the contract.

Is a dispute board decision final?

It depends on the contract and whether a timely Notice of Dissatisfaction was issued. Under commonly used FIDIC mechanisms, a decision may become final and binding if no valid notice is served.

Can arbitration begin without referring the dispute to a FIDIC dispute board?

This depends on the wording of the contract and the circumstances. Where dispute board referral is a condition precedent, bypassing it may create jurisdictional or admissibility objections.

What evidence is required for an extension-of-time claim?

The contractor will ordinarily need contractual notices, programmes, progress data, contemporaneous records, evidence of the delaying event and a reliable analysis connecting the event to the critical completion path.

Does an extension of time automatically create a right to prolongation costs?

No. Time and financial entitlement must usually be analysed separately. The contractor must establish the contractual basis, causation and amount of additional cost.

Can a tribunal freeze a Turkish bank account?

A tribunal cannot ordinarily bind a third-party bank directly. A Turkish court order may be required for coercive asset protection.

Can ISTAC administer construction disputes in English?

Yes. The parties may agree on English as the arbitration language and select arbitrators with international construction experience.

Can a Turkish construction award be enforced abroad?

Yes. A Turkish-seated award may be enforced in another New York Convention jurisdiction, subject to the limited refusal grounds under the Convention.

Conclusion

International construction arbitration in Turkey provides a flexible and internationally recognised framework for resolving technically and financially complex project disputes.

The effectiveness of the process depends on far more than the arbitration clause. Construction parties must administer notices, preserve project records, maintain reliable programmes, document variations and establish clear causal links between events, delay and loss.

FIDIC contracts add a structured claims and dispute-resolution system, but their procedures must be followed carefully. Dispute board referral, Notices of Dissatisfaction and amicable-settlement stages may determine whether a matter can proceed to arbitration.

Where Turkey is the seat, International Arbitration Law No. 4686 governs important procedural issues, including tribunal constitution, interim measures, evidence, the arbitration period and annulment. Turkish courts may support the proceedings through urgent protection and evidence collection while exercising limited supervisory review.

ISTAC offers an institutional option for domestic and international construction disputes, including emergency arbitrator, fast-track and online hearing mechanisms.

For contractors, employers and project companies, the strongest arbitration strategy begins at contract formation and continues throughout project execution. The parties should select an appropriate contractual form, define the allocation of design and site risks, draft a workable arbitration clause and preserve the evidence required to prove or defend future claims.

Once a dispute becomes unavoidable, early legal and technical assessment is critical. Delay experts, quantum experts, engineers and arbitration counsel should coordinate from the beginning rather than preparing isolated analyses at the end of the case.

A well-prepared construction arbitration can provide a binding, specialist and internationally enforceable resolution. A poorly administered project claim, however, may fail even where the underlying commercial complaint appears justified.

Legal Disclaimer: This article is provided for general informational purposes only and does not constitute legal advice. Construction disputes depend on the wording of the contract, governing law, project records, notice provisions, dispute board procedure, seat of arbitration and intended enforcement jurisdiction. Project-specific legal and technical advice should be obtained before commencing or defending arbitration.