Learn how lease agreements and contractual disputes are handled in Turkey, including landlord and tenant obligations, rent increases, eviction grounds, early termination, defect claims, mediation, and key protections under Turkish law.
Introduction
Lease agreements in Turkey are mainly governed by the Turkish Code of Obligations, which regulates leases in Articles 299 to 378. Turkish law divides the subject into three main groups: general lease rules, special rules for residential and roofed workplace leases, and agricultural or product leases. In practical terms, the most commercially important disputes usually arise in ordinary leases and especially in residential and roofed workplace leases, because those contracts are subject to additional tenant-protective rules on rent increases, deposits, termination, and eviction.
A lease dispute in Turkey is rarely limited to the simple question of whether rent was paid. The real legal issues often involve whether the property was delivered in a condition fit for its intended use, whether later defects were remedied, whether the tenant respected the property and the neighbors, whether the rent increase clause is enforceable, whether the landlord has a statutory ground for eviction, and whether the dispute had to go through mandatory mediation before a lawsuit could be filed. Since 1 September 2023, most disputes arising from lease relationships must go to mediation before court, except enforcement-based eviction of leased immovables through the non-judgment execution route under the Enforcement and Bankruptcy Law.
For that reason, understanding lease agreements and contractual disputes in Turkey requires more than reading the rent amount and the term. Turkish law asks what category of lease is involved, whether the parties validly structured their rights within mandatory limits, whether the dispute concerns rent, defects, use, transfer, early return, or eviction, and whether the correct procedural path was followed. This guide explains the legal framework in practical English and focuses on the issues that most often matter in Turkish lease disputes.
The Legal Nature of a Lease Agreement Under Turkish Law
Article 299 of the Turkish Code of Obligations defines a lease agreement as the contract under which the landlord undertakes to leave to the tenant the use of a thing, or the use together with enjoyment of it, and the tenant undertakes to pay the agreed rent in return. Article 300 adds that a lease may be concluded for a definite term or an indefinite term. If the agreed period expires automatically without any notice requirement, the lease is definite-term; other leases are treated as indefinite-term leases.
This definition matters because Turkish law does not treat every right to use property in the same way. A lease is a continuing contractual relationship built around use and rent, not a sale, not a loan for use, and not a mere operational arrangement. That continuing nature explains why Turkish law gives special attention to maintenance of the leased premises, rent payment periods, later defects, early return, assignment of the lease relationship, and different termination mechanisms for definite-term and indefinite-term leases.
Landlord’s Main Obligations
The landlord’s most basic duty appears in Article 301. The landlord must deliver the leased property on the agreed date in a condition fit for the use intended in the contract and must keep it in that condition throughout the lease term. In residential and roofed workplace leases, this rule cannot be changed against the tenant, and in other lease types it cannot be weakened against the tenant through general transaction conditions. Turkish law therefore places the usability of the property at the center of the landlord’s obligations.
Articles 302 and 303 add that, unless otherwise agreed or otherwise provided by law, the landlord bears compulsory insurance, taxes, and similar burdens connected with the property, as well as ancillary expenses incurred by the landlord or a third party in relation to the use of the leased property. This means Turkish law starts from the assumption that structural burdens tied to ownership remain with the landlord, while the tenant mainly bears rent and use-related costs.
Turkish law also imposes substantial liability on the landlord for defects. If the property is delivered with significant defects, the tenant may rely on the rules on debtor default or later-defect liability. If the property later becomes defective, the tenant may ask for the defect to be remedied, demand a rent reduction proportionate to the defect, and seek compensation; in cases of significant defect, the tenant may also terminate the lease. Article 306 further allows the tenant, after giving a suitable period, to remedy the defect at the landlord’s expense or ask for an equivalent defect-free replacement where appropriate. Article 308 adds that the landlord is liable for damage arising from the defective condition unless the landlord proves absence of fault.
The landlord also remains responsible when a third party asserts a right inconsistent with the tenant’s leasehold right. Under Article 309, if a third party claims such a right, the landlord must, upon notice from the tenant, assume the litigation and compensate all damage suffered by the tenant. Article 310 then adds a rule that often matters in real-estate transactions: if the leased property changes hands after the lease is concluded, the new owner automatically becomes a party to the lease. That means the sale of the property does not simply wipe out the tenant’s contractual position.
Tenant’s Main Obligations
On the tenant’s side, Articles 313 and 314 state that the tenant must pay the rent and, unless otherwise agreed or local custom provides otherwise, must also pay ancillary expenses at the end of each month and at the latest at the end of the lease term. If the tenant defaults after the property has been delivered, Article 315 allows the landlord to give written notice and a cure period; the minimum period is 10 days generally, but 30 days in residential and roofed workplace leases. If payment is still not made within that period, the landlord may terminate in accordance with the statute.
The tenant also has a duty of careful use and respect for neighbors. Article 316 requires the tenant to use the leased premises carefully in accordance with the contract and to show necessary respect to persons living in the same property and to neighbors. If the tenant breaches this duty, the landlord must generally give written notice and a cure period of at least 30 days in residential and roofed workplace leases; in other leases, immediate written termination is possible without prior warning. The article also recognizes that in more serious residential or roofed workplace cases, such as intentional severe damage, the ordinary cure period may be unnecessary.
Article 324 adds another rule that surprises many tenants: as long as the leased premises are kept available for use, the tenant remains liable for rent even if the tenant does not use the property, or uses it only partially, for a reason attributable to the tenant. The landlord must deduct expenses saved because of the non-use, but non-use alone does not automatically eliminate the tenant’s rent liability.
Sublease, Assignment, and Early Return
Turkish law distinguishes between subleasing, transfer of the right of use, and assignment of the lease relationship. Under Article 322, the tenant may sublease the property in whole or in part or transfer the right of use, provided that this does not create a harmful change for the landlord. However, in residential and roofed workplace leases, the tenant may not sublease or transfer the right of use without the landlord’s written consent. If the subtenant uses the property differently from the way allowed to the original tenant, the original tenant remains liable to the landlord, and the landlord may use its rights directly against the subtenant or user.
Article 323 regulates assignment of the lease relationship itself. The tenant cannot assign the lease relationship without the landlord’s written consent. In workplace leases, however, the landlord may not refuse consent without justified reason. Once the lease relationship is assigned with written consent, the assignee steps into the tenant’s place and the transferring tenant is released, but in workplace leases the transferring tenant remains jointly and severally liable with the assignee until the end of the lease and for a maximum of two years.
Article 325 addresses early return of the leased property. If the tenant returns the property before the end of the contract term or before the relevant termination period, the tenant’s obligations continue for a reasonable period during which the premises could be re-let on similar terms. But if the tenant finds a new tenant whom the landlord can reasonably be expected to accept, who is solvent, and who is ready to take over the lease, the original tenant’s obligations end before that reasonable period expires. The landlord must also deduct saved expenses and any benefit actually obtained, or deliberately avoided, from other use of the property. This makes early departure a structured risk-allocation issue rather than a simple all-or-nothing event.
Residential and Roofed Workplace Leases: Special Protection
Articles 339 to 356 create a special regime for residential and roofed workplace leases. Article 339 defines the scope of this protection and states that the rules apply not only to the leased immovable itself but also to the movable items left to the tenant for use together with it. These special rules do not apply to immovables allocated by nature to temporary use and leased for six months or less, but they do apply to all lease contracts made by public institutions and bodies regardless of the procedural framework used.
Article 340 makes an important anti-circumvention rule. If the making or continuation of a residential or roofed workplace lease is tied, without benefit to the tenant, to the tenant assuming another obligation that is not directly related to the use of the leased premises, the related contract is invalid. This provision matters because Turkish law does not allow landlords to smuggle unrelated burdens into lease relationships merely because the tenant needs the property.
Article 341 deals with use-related expenses such as heating, lighting, and water, and says the tenant bears them unless the contract provides otherwise or local custom says otherwise. Article 342 limits the tenant’s security deposit in residential and roofed workplace leases to three months’ rent. If the deposit is money or negotiable paper, it must be deposited with a bank in a way that prevents withdrawal without the landlord’s approval, and if the landlord does not, within three months after the lease ends, notify the bank that a lawsuit or enforcement proceeding relating to the lease has been started, the bank must return the deposit upon the tenant’s request.
Rent Increases and Rent Determination
One of the most contested subjects in Turkish lease practice is rent increase. Article 343 states that, in residential and roofed workplace leases, no change may be made to the tenant’s detriment other than in relation to the determination of rent. Article 344 then provides the core rule: agreements on the rent to be applied in renewed rental periods are valid only to the extent they do not exceed the 12-month average change in the consumer price index (CPI) in the preceding rental year. The same principle applies to leases longer than one year. If the parties made no rent-adjustment agreement, the judge may determine the new rent, again subject to the CPI-average ceiling. After five years, or after renewal following five years, the judge may determine the rent with reference to CPI, the condition of the leased premises, and comparable market rents.
This framework is crucial because Turkish law does not leave residential and roofed workplace rent increases entirely to unrestricted private bargaining. CPI remains the baseline restraint for ordinary renewal periods, while the five-year regime opens the door to fuller judicial re-evaluation. In practice, many lease disputes in Turkey are not simple collection cases but rent determination or rent adaptation disputes shaped by these statutory limits.
Restrictions on Tenant-Detrimental Clauses
Article 346 is a major tenant-protection provision. It states that the tenant cannot be burdened with any payment obligation other than rent and ancillary expenses. It specifically invalidates agreements providing that a penalty clause becomes payable if rent is not paid on time or that future rent installments become automatically due because of late payment. This is one of the clearest examples of Turkish law overriding aggressive lease boilerplate in order to protect the tenant.
For that reason, landlords and property managers using standard forms in Turkey should not assume that harsh acceleration and penalty language will be enforceable just because it is common in commercial practice elsewhere. In residential and roofed workplace leases, Turkish law explicitly invalidates such clauses to the tenant’s detriment.
Termination and Eviction in Residential and Roofed Workplace Leases
Article 347 is the starting point for termination in residential and roofed workplace leases. If the tenant does not give notice at least 15 days before the end of a definite term, the lease is deemed extended for one more year on the same conditions. The landlord cannot terminate merely by relying on the expiry of the agreed term. However, after the end of the ten-year extension period, the landlord may terminate without giving any reason by giving notice at least three months before the end of each extension year. In indefinite-term residential and roofed workplace leases, the tenant may terminate at any time according to the general rules, while the landlord may do so only after ten years from the start of the lease. Article 348 then adds that termination notices in these lease categories are valid only if made in writing.
Article 349 adds special protection for the family home. Where the leased immovable is used as the family residence, the tenant may not terminate the lease without the explicit consent of the spouse. If that consent cannot be obtained, or is withheld without justified reason, the tenant may apply to the judge. If the non-tenant spouse notifies the landlord and thereby becomes a party to the lease relationship, certain termination notices and warnings tied to payment must be directed separately to both the tenant and the spouse.
The landlord’s main statutory eviction grounds appear in Articles 350 to 352. Article 350 allows the landlord to terminate through a lawsuit if the property is genuinely needed for the landlord, the spouse, descendants, ascendants, or other persons the landlord is legally obliged to support, or if major reconstruction, redevelopment, extension, or alteration is necessary and use during the works is impossible. Article 351 gives a similar right to a new owner who later acquires the property and needs it for the same listed persons, provided the statutory written notice and timing requirements are met. Article 352 gives additional tenant-originated grounds: a written evacuation undertaking given after delivery but not honored, two justified written notices for rent default in the relevant period, or discovery that the tenant or cohabiting spouse already had a suitable dwelling in the same district or municipality and the landlord did not know that fact at the time of contracting.
Article 353 allows the landlord to extend the lawsuit filing period by one rental year if the landlord gives written notice to the tenant, within the original action period, that it will file suit. Article 354 then provides that the statutory rules on judicial termination may not be changed against the tenant. Article 355 further protects the tenant after an eviction based on need or reconstruction: absent justified reason, the landlord may not re-let the premises to someone other than the former tenant for three years, and if the landlord violates this rule, the former tenant is entitled to compensation of at least one year’s last rent.
Extraordinary Termination and Practical Disputes
Article 331 allows either party to terminate the lease at any time, while observing the statutory notice period, if important reasons make continuation of the relationship intolerable. The judge determines the financial consequences of this extraordinary termination in light of the concrete circumstances. This is especially relevant where the dispute is not a classic rent-default or ordinary term-end issue but a breakdown of the relationship caused by exceptional circumstances.
In practical Turkish litigation, lease disputes therefore cluster around a few recurring themes: unpaid rent and ancillary costs, misuse of the premises, defect and maintenance claims, disputes over rent increases or rent determination, early return and replacement-tenant issues, consent to sublease or assignment, family-home complications, and eviction actions based on need, redevelopment, written evacuation commitments, or repeated default. The statutory framework is detailed precisely because the lease relationship is continuing and conflict-prone.
Mandatory Mediation Before Litigation
A major procedural development is Article 18/B of the Mediation Law. It states that, before a lawsuit is filed, applying to a mediator is a condition of action for disputes arising from the lease relationship, excluding only the eviction of leased immovables through the non-judgment execution route under the Enforcement and Bankruptcy Law. The same law shows that the amendment introducing Article 18/B took effect on 1 September 2023. This means that many rent, eviction, adaptation, and related lease disputes cannot go directly to court without first completing the mediation step.
This requirement is not a minor procedural detail. Filing suit without first going through mandatory mediation can lead to procedural dismissal. In practice, anyone planning lease litigation in Turkey should therefore analyze not only the substantive lease rules but also whether the dispute falls within the mediation precondition and how the mediation record must be handled before court proceedings begin.
Conclusion
Lease agreements and contractual disputes in Turkey are governed by a dense statutory framework that combines general lease rules with especially strong protections for residential and roofed workplace leases. The Turkish Code of Obligations regulates the definition of the lease, the landlord’s delivery and maintenance obligations, the tenant’s payment and careful-use duties, defect remedies, subleasing and assignment, early return, rent determination, deposits, termination, and eviction. Residential and roofed workplace leases receive additional tenant-protective rules on linked agreements, deposits, CPI-based rent increases, invalid penalty clauses, written termination notices, and limited judicial eviction grounds.
The practical takeaway is clear: Turkish lease law is not just about possession and rent. It is about statutory fit-for-use obligations, regulated rent adjustments, strict eviction grounds, procedural notice requirements, and, since September 2023, mandatory mediation for most lease disputes before court. Parties who understand those rules at the drafting and performance stage are in a far stronger position than parties who try to solve the problem only after the dispute has hardened into litigation
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