Building Due Diligence in Turkey: Earthquake Reports, Inspections, and Iskan Requirements

Building Due Diligence in Turkey: Earthquake Reports, Inspections, and Iskan Requirements

08.03.2026

Structural Due Diligence Under Turkish Property Law

​​Structural due diligence forms a central part of property acquisition in Turkey, particularly when you are assessing the long-term suitability and safety of a residential or commercial building. Under Turkish property law, technical compliance, construction permits, and occupancy permissions each play a distinct legal role. Understanding how these documents interconnect helps you evaluate whether a building has been constructed and registered in accordance with relevant municipal regulations.

When reviewing a property, the first step typically involves confirming the status of the construction permit (yapı ruhsatı) and comparing it with the physical structure you intend to purchase. Municipal records should reflect the correct number of floors, internal layout, and usage type. Any divergence between the approved project and the current condition may signal an unauthorised extension or internal alteration, which may require later regularisation.

You should also verify the occupancy permit (iskan), which confirms that the building has passed its final technical and infrastructural checks. In most cases, the absence of an iskan suggests that essential installations such as water, sewage, and electricity systems have not been formally certified by the municipality. This may limit access to individual utility registrations and, in some instances, delay completion of the title deed transfer at the Land Registry.

Finally, it is prudent to examine the building’s history within municipal and land registry systems. This may include reviewing past renovation approvals, enforcement notices, or records of structural amendments. Local authorities may also hold information on any administrative sanctions issued during construction. These checks collectively provide a clearer understanding of the building’s regulatory status and highlight issues requiring legal or technical clarification before you proceed.

Earthquake Risk Assessment and Technical Reports

Earthquake risk assessment has become a routine component of due diligence in Turkey, particularly for buildings completed before recent seismic regulation updates. Under Turkish law, municipalities and the Ministry of Environment, Urbanisation and Climate Change issue technical standards governing structural resistance, material quality, and load-bearing calculations. These standards are reflected in project documentation and may be reviewed as part of your pre-purchase evaluation.

A key document in this process is the deprem dayanıklılık raporu (earthquake resistance report), generally prepared by a licensed civil engineer or an accredited technical bureau. This report typically analyses the building’s structural system, concrete strength, and compliance with the relevant earthquake regulations. While not mandatory for every transaction, commissioning such a report may be prudent when purchasing older buildings or where no recent structural assessment is available from the owners’ association.

You may also request records relating to past testing, including core sampling results, renovation approvals, or reinforcement works undertaken under earlier urban transformation programmes. These records help you understand whether the building has been subject to structural improvements or whether deficiencies have been identified previously. Local municipalities may retain copies of these documents, although availability varies between districts.

Finally, it is advisable to review the building’s status within the riskli yapı tespiti procedure, which is regulated under the Law on Transformation of Areas Under Disaster Risk (Law No. 6306). A building designated as “risky” may be subject to demolition or mandatory strengthening, and this status may affect your ability to complete a transaction or secure future residence permits tied to the property. You should therefore ensure that no current or pending risk designation exists before purchase. 

Building Inspection in Turkey: Legal Requirements and Practical Checks

A building inspection in Turkey typically involves a review of technical documents, municipal approvals, and the physical condition of the structure. Under Turkish property law, these checks help you understand whether the building was constructed in accordance with its approved architectural project and whether subsequent alterations comply with municipal rules. This stage forms a core component of your due diligence before signing a sale agreement or completing the title deed transfer at the Land Registry.

A prudent starting point is verifying the architectural project (mimari proje) and static project (statik proje) filed with the municipality. These documents illustrate the building’s structural design, materials, and permitted layout. You should ensure that the current condition matches the approved plan, as unauthorised alterations may require legalisation or attract administrative penalties. Such discrepancies can also complicate future renovation approvals or insurance assessments.

It is also advisable to review the common area arrangements and technical installations, particularly in multi-unit apartment blocks. Under Turkish condominium law, shared systems such as the roof, foundations, elevator shafts, and mechanical infrastructure fall under collective responsibility. If the building management has issued maintenance notices or if an outstanding technical report identifies deficiencies, these issues may influence long-term costs or require collective decision-making under the management plan.

Finally, practical on-site checks remain essential, particularly in provinces with notable seismic activity such as Istanbul, Antalya, and parts of Muğla. A qualified engineer can inspect visible structural elements, assess signs of material degradation, and evaluate compliance with basic safety standards. While this inspection does not replace a full seismic assessment, it provides an overview of the building’s general condition and may highlight areas requiring detailed analysis. Combined with municipal documentation, these findings help you form a comprehensive view of the property’s technical and legal status.

Iskan Requirements and Compliance at the Land Registry

The occupancy permit (iskan) is a central document in Turkish property transactions, as it confirms that a building has passed its final municipal inspections and is considered suitable for occupation. Under Turkish property law, the iskan verifies that the construction matches the approved architectural and engineering projects and that essential infrastructure—such as water, sewage, and electricity connections—has been certified. Its presence often indicates that the building has completed all required stages of municipal scrutiny.

When conducting due diligence, you should confirm whether the main building has a yapı kullanma izin belgesi (building occupancy permit) and, where relevant, whether the independent section you intend to purchase has been registered in accordance with the condominium deed (kat mülkiyeti tapusu). A building operating under kat irtifakı (construction easement) without a completed iskan may still be legally transferable, but certain practical limitations may arise. These may include challenges in obtaining individual utility subscriptions or delays in carrying out formal alterations within the building.

It is also prudent to examine the Land Registry for annotations relating to construction completion, compliance issues, or pending administrative actions. Although the Land Registry does not routinely display technical deficiencies, it will record restrictions, such as provisional measures, court orders, or annotations linked to urban transformation procedures. Verifying the absence of such entries provides clarity on whether any outstanding obligations may affect ownership rights.

Finally, you may request relevant municipal records to cross-check the status of the iskan. Municipal archives typically hold copies of occupancy permits, utility approval sheets, and completion reports submitted by the contractor. If the iskan has not been issued, it is advisable to identify the underlying reason—whether due to an unfinished common area, an unapproved structural change, or an unresolved administrative process. This assessment helps determine whether the building is likely to obtain an iskan in the future and whether any legal or financial risks exist at the point of transfer.

FAQ

1. Do all buildings in Turkey legally require an earthquake safety report?
Under Turkish law, a formal earthquake resistance report is not mandatory for every transaction. It is typically commissioned for older buildings or where no recent structural assessment exists. You may request available technical records from the municipality or owners’ association during due diligence.

2. How can a foreign buyer confirm whether a property has a valid iskan?
You may verify the occupancy permit with the relevant municipality, which holds the official yapı kullanma izin belgesi. It is also prudent to check the Land Registry to confirm whether the property is registered under kat mülkiyeti, which generally indicates that an iskan has been issued.

3. What are the main inspection documents to request before completing a property purchase?
Key documents typically include the construction permit, occupancy permit, approved architectural and structural projects, and any available technical reports. Reviewing these alongside municipal records helps determine whether the building complies with its authorised design and regulatory requirements.

Summary

Building due diligence in Turkey requires a structured review of technical documents, municipal approvals, and the legal status of the property at the Land Registry. Earthquake assessments, project-based checks, and building inspections in Turkey each provide a different layer of clarity regarding structural integrity and regulatory compliance. Confirming the status of the occupancy permit and understanding any outstanding administrative issues helps you identify practical or legal limitations before purchase. Together, these steps support a more informed and risk-aware acquisition process for foreign buyers.

For professional legal assistance with your property matters in Turkey, contact Gokalp Legal.

This article provides general information and does not constitute legal advice.