Commercial Tenant Changes the Purpose of the Property in Turkey: Can the Lease Be Terminated? 2026 Updated Guide

Can a landlord terminate a commercial lease when the tenant changes the agreed use of the property in Turkey? Learn about unauthorized use, written warnings, material breach, eviction and landlord remedies.

A commercial tenant in Turkey may lease premises for a specifically agreed purpose—such as an office, restaurant, retail store, warehouse, clinic or showroom—but later begin using the property for a substantially different business. This can create serious legal problems for both Turkish and foreign property owners. Whether the landlord can terminate the lease depends on the lease agreement, nature of the new activity, seriousness of the breach, zoning and licensing rules, impact on the property and whether the statutory conditions for termination are satisfied. A change of business activity does not automatically terminate every commercial lease, but unauthorized use can constitute a significant breach and, in appropriate circumstances, support termination and eviction.

Why Is the Agreed Purpose of a Commercial Lease Important?

Commercial lease agreements frequently contain provisions describing how the premises may be used. A lease may state, for example, that the property will be used exclusively as an office, café, pharmacy, warehouse, retail store or another specified business.

Such clauses can protect the landlord from regulatory, structural and commercial risks associated with activities that were never contemplated when the property was leased.

Can a Tenant Change the Business Activity Without the Landlord’s Consent?

The answer depends primarily on the lease terms and circumstances. If the agreement restricts the premises to a particular use, a material change without the landlord’s consent may constitute breach of contract.

The legal analysis should consider the difference between a minor change within the same commercial activity and a fundamentally different use.

Minor Business Changes and Fundamental Changes Are Different

A tenant changing the type of products sold in an existing retail store may present a very different situation from converting an office into a restaurant, workshop or entertainment venue.

The more substantially the new activity changes the nature, risk and physical use of the property, the stronger the landlord’s potential contractual concerns may become.

Review the Lease Agreement First

The landlord should examine provisions concerning:

• permitted use of the premises;
• prohibited activities;
• alteration and renovation;
• licensing obligations;
• compliance with legislation;
• nuisance and disturbance;
• landlord consent;
• subletting and transfer;
• termination.

The precise contractual wording can materially affect the legal strategy.

Turkish Code of Obligations and Tenant’s Duty of Care

Under Turkish lease law, tenants are required to use leased property carefully and in accordance with their obligations while respecting persons living in the property and neighbors.

For roofed workplace leases, serious violations of the tenant’s duties can potentially provide grounds for termination subject to the statutory requirements.

Is a Written Warning Necessary?

In many breach situations involving roofed workplaces, the landlord should first determine whether a written notice providing the legally required opportunity to cure is necessary.

The notice should clearly identify the unauthorized activity, relevant contractual provision and corrective action demanded from the tenant.

The Warning Should Be Specific

A vague notice saying merely “you are breaching the lease” can create unnecessary disputes.

The landlord should describe what the agreed use was, what the tenant is currently doing and why that activity allegedly violates the agreement.

Can the Landlord Terminate Immediately?

Immediate termination should not be assumed in every case.

However, Turkish lease law recognizes circumstances in which sufficiently serious conduct may justify termination without following the ordinary cure process. Whether those conditions exist requires a case-specific assessment.

Serious Damage to the Property Can Strengthen the Landlord’s Position

Suppose premises rented as an office are converted into a commercial kitchen requiring ventilation systems, gas installations, heavy electrical equipment and structural alterations.

The issue may extend beyond a simple contractual change of business activity and involve physical alterations and property-safety concerns.

Unauthorized Renovations Should Be Examined Separately

Changing the purpose of premises often involves renovations.

The landlord should determine whether walls were removed, installations changed, ventilation added, electrical capacity modified, façades altered or common areas affected without permission.

These alterations may create independent contractual claims.

Zoning Rules Can Become Important

The fact that a tenant wants to conduct a particular business does not necessarily mean that the premises are legally suitable for that activity.

The permitted planning and zoning status of the property should therefore be checked where the new use raises regulatory concerns.

Business Licensing Problems Can Affect the Dispute

Some activities require specific permits, licenses or physical conditions.

If the tenant operates without necessary approvals, the landlord should document the situation and determine whether the conduct also violates the lease’s legal-compliance provisions.

Condominium Rules May Restrict Commercial Activities

Where the commercial unit is located in a condominium, the condominium regime and management plan should also be reviewed.

Certain uses can generate additional restrictions because of their impact on other owners and occupants.

Noise, Odor and Customer Traffic Can Become Evidence

A change from one commercial activity to another can increase noise, odors, deliveries, customer traffic or operating hours.

Complaints from neighbors and building management can therefore become relevant evidence.

Collect Evidence Before Starting Eviction Proceedings

The landlord should document the actual use of the premises.

Useful evidence may include photographs, advertisements, business listings, correspondence, building-management records, official inspection documents and other lawfully obtained material.

Avoid Unlawful Self-Help Measures

The landlord should not simply change the locks, cut utilities or physically remove the tenant because the property’s use has changed.

Termination and eviction should proceed through legally available mechanisms.

What If the Lease Expressly Prohibits the New Activity?

An express prohibition can significantly strengthen the landlord’s contractual argument.

However, the landlord should still follow the legally appropriate termination procedure rather than assuming that the clause itself permits immediate physical eviction.

What If the Lease Says “Office Only”?

If the tenant subsequently converts the premises into a restaurant, accommodation business, manufacturing site or another fundamentally different operation, the landlord may have a substantial breach argument.

The regulatory consequences of the new activity should also be investigated.

What If the Lease Broadly Says “Commercial Use”?

A broadly drafted permitted-use provision can make the dispute more complicated.

The landlord may then need to rely more heavily on the nature of the new activity, legal restrictions, physical alterations, nuisance or other contractual provisions.

Did the Landlord Previously Consent?

Before alleging breach, review emails, messages, amendments and prior correspondence.

A tenant may argue that the landlord expressly or implicitly approved the new activity.

Silence Can Create Evidentiary Problems

If the landlord knew for a long period that the tenant was operating a different business but raised no objection, the tenant may rely on that history in defending the case.

Landlords should therefore respond promptly after discovering an unauthorized material change.

Oral Consent Can Cause Disputes

The tenant may claim that the landlord verbally approved the new use.

Important changes to commercial leasing arrangements should therefore be documented in writing whenever possible.

Can the Landlord Demand Restoration?

Where the tenant has made unauthorized physical alterations, restoration obligations should be analyzed separately from termination.

The landlord should document the original and current condition of the property.

Expert Examination May Be Necessary

For substantial structural, mechanical or electrical alterations, an expert assessment can help establish what was changed, whether the work caused damage and what restoration may cost.

Can the Landlord Claim Damages?

Potentially. If unauthorized use causes actual financial loss, physical damage, regulatory costs or restoration expenses, compensation may be sought where the legal requirements are satisfied.

The amount should be supported with evidence rather than estimated arbitrarily.

Security Deposit Issues

The landlord should not automatically treat the entire security deposit as compensation.

Any claim involving the deposit should be connected with actual contractual obligations and documented losses.

What If the Tenant Stops the Unauthorized Activity After Warning?

If the applicable legal route requires an opportunity to cure and the tenant fully remedies the breach within the relevant period, this can affect the landlord’s ability to rely on that particular breach for termination.

The effectiveness and permanence of the correction should therefore be documented.

Repeated Violations Can Change the Analysis

A tenant that repeatedly returns to prohibited activity after warnings may create a stronger record of contractual non-compliance.

Keep all notices and evidence chronologically.

Can the Landlord File an Eviction Case?

Where a valid termination ground exists and the tenant does not surrender the property, judicial eviction may be pursued through the legally appropriate procedure.

The termination notice, contractual provisions and evidence of unauthorized use can become central to the case.

Mandatory Mediation Should Be Considered

Lease disputes in Turkey may be subject to mandatory mediation before litigation depending on the nature of the claim.

The procedural route should therefore be checked before filing an eviction or related lawsuit.

Foreign Landlords Can Enforce Their Rights in Turkey

A foreign individual or foreign company owning commercial property in Turkey can pursue remedies under Turkish law.

Being located abroad does not prevent the owner from addressing unauthorized commercial use through Turkish legal procedures.

Power of Attorney Can Simplify the Process

A foreign landlord who cannot remain in Turkey throughout the dispute may authorize a Turkish lawyer to handle notices, mediation, court proceedings and related procedures.

Commercial Property Buyers Should Check Existing Tenant Use

A foreign investor purchasing a tenanted commercial property should not rely only on the written lease.

The investor should verify what business is actually operating at the property and whether that use complies with contractual and regulatory requirements.

Immediate Action Plan for the Landlord

When a commercial tenant changes the purpose of leased premises, the landlord should immediately review the permitted-use clause, determine the tenant’s actual activity, investigate licensing and zoning implications, document unauthorized renovations, preserve evidence, determine whether a written cure notice is required, avoid unlawful self-help, evaluate mediation requirements and pursue termination and eviction through the appropriate legal procedure if the breach continues.

Frequently Asked Questions

Can a commercial tenant use the property for any business they want?

Not necessarily. The lease agreement and applicable regulatory restrictions can limit the permitted use.

Can changing the business type justify termination?

Potentially. The seriousness of the change, contractual wording and surrounding circumstances must be evaluated.

Is every change of business a material breach?

No. Minor changes and fundamental changes should be distinguished.

Does the landlord have to send a written warning?

A written warning may be required for certain breaches involving roofed workplace leases. The precise termination ground should be identified before action is taken.

Can the landlord immediately change the locks?

The landlord should not resort to unlawful self-help. Eviction should follow the legally permitted process.

What if the tenant made structural alterations?

Unauthorized alterations may create additional grounds for contractual claims and potentially compensation or restoration obligations.

What if the new business has no required license?

Regulatory non-compliance can materially strengthen the landlord’s concerns and should be documented through lawful evidence.

Can neighbors’ complaints be used as evidence?

They may be relevant, particularly where the changed use causes noise, odor, traffic or other disturbance.

Can a foreign owner file an eviction case in Turkey?

Yes. Foreign ownership does not prevent enforcement of lease rights under Turkish law.

What should the landlord do first?

Review the lease and document exactly how the property’s actual use differs from the agreed purpose. The termination strategy should then be based on the contractual breach, seriousness of the conduct, regulatory consequences and applicable Turkish lease-law procedure.

Client-Focused Legal Support for Commercial Lease and Eviction Disputes

Unauthorized changes in the use of commercial premises can create lease termination, eviction, zoning, licensing, property damage and compensation disputes for landlords and foreign property investors in Turkey. Fırat Fesih Kaya Law Office assists Turkish and foreign property owners in commercial lease disputes, including unauthorized business activities, contractual breaches, written notices, mandatory mediation, termination and eviction proceedings. Lawyer Fırat Fesih Kaya provides legal assistance in evaluating lease agreements, documenting violations, preparing termination strategies and pursuing the recovery of commercial premises through Turkish legal procedures.

Phone: +90 312 434 22 22
Mobile: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No:221, Yıldırım Tower, Office No:148, 06520 Balgat, Çankaya, Ankara, Turkey