Bank Guarantees in Urban Transformation Projects in Turkey: Why Property Owners Need Protection (2026 Updated Guide)

Learn how guarantees can protect property owners in urban transformation projects in Turkey against contractor default, insolvency, unfinished construction and financial loss, and how statutory security and building completion insurance work in 2026.

An urban transformation project creates a significant imbalance of risk between property owners and the contractor. Owners may vacate their apartments, allow the existing building to be demolished, make additional payments and, depending on the agreement, transfer valuable property rights to the contractor long before receiving their completed replacement units.

If the contractor completes the project properly, the arrangement may work as planned. If the contractor becomes financially distressed, abandons construction or becomes insolvent, however, owners can be left with an unfinished building and substantial financial losses.

This is why contractor security should be examined before construction begins.

In everyday negotiations, property owners often refer broadly to a “bank guarantee.” Legally, however, it is important to distinguish a contractual bank guarantee requested by the owners from the statutory security mechanism required under the urban transformation framework and from building completion insurance.

Under the current implementing rules, where private parties carry out redevelopment on parcels containing risky buildings, the construction contractor is generally required, before obtaining the construction permit, to provide security equal to 6% of the approximate construction cost, subject to the applicable statutory exceptions. The regulation accepts the forms of security recognized under the relevant public procurement rules.

For property owners, the practical question should therefore not simply be, “Does the contractor have a guarantee?”

The better questions are: What type of security exists, what amount does it cover, who holds it, when can it be used, how long does it remain valid, and is additional contractual protection necessary?

Statutory Security and a Contractual Bank Guarantee Are Not Necessarily the Same Thing

This distinction is essential.

The current urban transformation regulation establishes mandatory security requirements for specified projects. For risky-building parcels developed by private parties, the contractor must generally provide security before the construction permit is issued. Following the regulatory changes now reflected in the consolidated rules, the applicable rate for this category is 6% of the approximate construction cost.

A property owner may separately negotiate additional contractual protection, potentially including a bank-issued guarantee appropriate to the transaction.

The existence of statutory security does not automatically mean that owners have received a private bank guarantee covering every contractual obligation.

Likewise, a private contractual guarantee should not be confused with compliance with the statutory security regime.

Both documents and their legal functions should be examined separately.

Why Was the Security Requirement Created?

The purpose becomes clear when a project fails.

Under the implementing regulation, the statutory security is retained until the project or construction work has been completed in accordance with the agreement and specifications and the relevant occupancy documentation has been obtained.

If the project is not completed in accordance with the agreement and specifications, the security can be converted into money and transferred toward the person or entity that undertakes completion of the project. Any remaining amount after completion is returned to the party that originally provided the security.

This mechanism is particularly important because the objective is not merely to compensate owners after years of litigation. It can help support completion of an unfinished project.

Is the Current Security Rate 6% or 10%?

Property owners may encounter both figures when researching urban transformation projects.

This is because the regulation changed.

The May 2024 amendment provided a 10% security requirement for private redevelopment on risky-building parcels. The later December 2024 amendment changed the applicable rate for that category to 6%. The consolidated regulation now reflects the 6% rate. A further amendment published in February 2026 introduced a transitional rule allowing qualifying securities associated with permits issued from January 1, 2024 onward to be reorganized at the changed 6% rate upon the contractor’s request.

For a current project, owners should therefore verify the applicable consolidated rule rather than relying on an older article stating that the security is always 10%.

When Must the Contractor Provide the Statutory Security?

For qualifying private redevelopment on parcels containing risky buildings, the security must generally be provided before the construction permit is obtained.

This timing is important.

Owners should not wait until construction is already experiencing financial problems before asking whether the legally required protection exists.

The security documents should be checked during the project-formation and permit stages.

If the contractor claims that security has been provided, owners should seek confirmation of the actual security structure rather than relying solely on a verbal statement.

What Forms of Security Are Accepted?

The implementing regulation provides that the forms of security recognized under the relevant public procurement legislation are accepted for the statutory mechanism. It also permits one acceptable form of security to be replaced with another acceptable form.

This is one reason why the common phrase “bank guarantee” should be used carefully.

Depending on the project and legal structure, the relevant protection may take the form of a guarantee letter or another legally accepted security.

Property owners should examine the actual document rather than assuming the nature of the protection from how the contractor describes it.

Who Holds the Statutory Security?

The implementing regulation requires the relevant statutory security to be deposited with the accounting unit of the competent authority.

This means that the statutory mechanism is not simply a private document held by the property owners.

That distinction matters when owners evaluate how the protection can be used.

A private guarantee negotiated directly for the benefit of owners can operate differently from statutory security held within the regulatory framework.

The two protections should therefore not be treated as interchangeable without reviewing their terms.

How Long Should a Guarantee Remain Valid?

Duration is one of the most important issues in any guarantee structure.

A guarantee that expires while substantial construction obligations remain outstanding may provide little practical protection.

For the statutory mechanism, the regulation provides that the duration of guarantee letters is determined by the competent authority with reference to the completion date of the work.

Where owners negotiate additional private security, the expiry structure should also be examined carefully.

The guarantee should not disappear prematurely merely because the contractor originally expected to complete the project by a particular date.

Potential construction extensions and delay risk should be considered when the security is structured.

A Guarantee Must Be Reviewed Together With the Contractor Agreement

A guarantee cannot be evaluated properly without reading the underlying construction agreement.

The contractor agreement determines what the contractor must actually do.

It may regulate the construction start date, completion date, technical specifications, temporary rent, additional owner payments, title transfers, delay, defects and termination.

The guarantee should be examined against these obligations.

If the contractor agreement contains vague performance standards, even strong financial security may not eliminate disputes over whether a default has actually occurred.

The contract and the security structure must therefore work together.

Owners Should Understand Exactly What the Guarantee Secures

This question should be answered before signing.

Does the protection secure completion of the building?

Does it secure monetary obligations?

Does it address temporary-rent payments?

Does it protect additional owner payments?

Does it respond to contractor insolvency?

Does it remain available after serious delay?

Does it cover defects discovered after delivery?

Different guarantee instruments can answer these questions differently.

Owners should not assume that a guarantee securing one obligation automatically covers every loss arising from the project.

Why Contractor Bankruptcy Makes Security Critical

Contractor bankruptcy can transform an ordinary construction dispute into a much more complicated problem.

The contractor may have numerous creditors. Construction may be unfinished. Temporary rent may remain unpaid. Owners may already have transferred property interests.

A contractual claim against the contractor may still exist, but the contractor’s ability to satisfy that claim can be severely reduced.

Security is important precisely because owners should not have to rely exclusively on the contractor’s remaining assets after financial failure.

This is why security should be arranged while the contractor is financially capable of providing it.

Bank Guarantees Can Provide Additional Contractual Protection

Depending on the project and negotiations, owners may seek additional contractual security beyond the minimum statutory mechanism.

A properly structured bank guarantee can reduce dependence on the contractor’s own financial condition because the issuing bank assumes the relevant payment obligation under the terms of the guarantee.

However, the effectiveness of such protection depends heavily on drafting.

The amount, beneficiary, duration, demand conditions, secured obligations and release mechanism should all be examined carefully.

A guarantee that is difficult to call or expires too early may provide far less protection than owners expect.

Pay Attention to Conditional Guarantees

Not all guarantee instruments provide the same level of practical protection.

Owners should examine whether payment depends on producing particular evidence, obtaining a court judgment, establishing contractor liability or satisfying other conditions.

The more complicated the payment conditions, the greater the possibility of a dispute when the guarantee is needed.

For significant redevelopment projects, the guarantee wording should therefore be reviewed before the contractor agreement is finalized.

The name of the instrument alone does not determine how effective it will be.

The Guarantee Amount Must Be Meaningful

Even a legally valid guarantee can be commercially inadequate if its amount is too small relative to the owners’ exposure.

Owners should consider the scale of the project, construction cost, value of rights transferred to the contractor and likely cost of completing unfinished work.

The statutory security rate provides a regulatory minimum mechanism for the relevant category of project, but owners should still assess whether their private contractual exposure requires additional protection.

This becomes especially important where owners are making substantial additional payments or transferring valuable property rights early.

A Bank Guarantee Does Not Make Early Title Transfers Automatically Safe

Owners should not think:

“There is a guarantee, so we can transfer everything to the contractor now.”

That approach can still create serious risk.

If valuable land shares or future units are transferred to the contractor substantially ahead of construction progress, owners may become involved in complicated title, creditor and insolvency disputes if the contractor fails.

Security should complement controlled title transfers rather than replace them.

Where commercially and legally appropriate, contractor consideration can be released progressively as measurable construction stages are completed.

Use Staged Title Transfers Together With Security

A stronger structure can combine several protections.

The contractor provides the applicable statutory security or building completion protection.

The private agreement contains additional security where appropriate.

Land-share or unit transfers are linked to construction milestones.

Owner payments are also connected to progress.

Construction is independently monitored.

This approach reduces the possibility that the contractor receives most of the project’s economic value while the owners continue carrying most of the completion risk.

Current Rules Also Limit Contractor Sales According to Construction Progress

The regulatory framework contains an additional protection concerning independent units allocated to contractors.

For applicable private projects, sales of units falling to the contractor under the construction agreement are tied to verified construction progress and permission from the competent authority. The regulation provides a mechanism under which the authority determines construction completion and permits contractor-unit sales below the determined progress level; sales reaching or exceeding that level require the consent specified by the regulation.

This reflects an important policy principle: the contractor should not freely extract the full economic value of the project far ahead of actual construction.

Owners can apply the same risk-management logic when negotiating their private contract.

Building Completion Insurance Is an Alternative Protection Mechanism

Property owners should also understand building completion insurance.

Under the current framework, qualifying projects under Law No. 6306 must, before the construction permit, have building completion insurance meeting the applicable requirements or satisfy the other security conditions determined under the urban transformation framework. Where qualifying building completion insurance is obtained, the separate statutory security requirement under the implementing regulation does not apply in the same way.

This creates an important distinction.

Owners should determine whether their project is protected through statutory security or qualifying building completion insurance rather than assuming both necessarily apply simultaneously.

How Does Building Completion Insurance Protect Property Owners?

Building completion insurance is structured through protection documents issued for rights holders.

According to the official insurance guidance, after the relevant construction permit and establishment of the required property structure, the insurer issues a separate protection certificate for each property owner. The protection amount is connected to the construction cost of the independent unit covered by the owner’s construction agreement, including qualifying payments made through banking channels.

Property owners should therefore obtain their own protection certificate rather than merely accepting a copy of a general insurance policy.

The certificate should be checked to ensure that the correct owner, project and protection amount are identified.

Does Building Completion Insurance Cover Contractor Bankruptcy?

The official guidance specifically identifies contractor bankruptcy as one of the circumstances in which building completion insurance can provide protection, subject to the applicable general and special policy conditions.

The guidance also addresses certain other serious circumstances preventing the contractor from completing and delivering the property.

For owners concerned primarily about contractor insolvency, this makes building completion insurance particularly relevant.

However, the actual certificate and policy conditions must still be reviewed.

Check the Protection Certificate Carefully

The official guidance recommends that owners verify several essential elements.

The certificate should be issued in the owner’s name, identify the type of construction project, state the maximum protection allocated to the owner’s interest and identify the validity period.

The official guidance further states that the validity period should cover at least the project period plus twelve months.

Owners should therefore not be satisfied with the statement that “insurance exists.”

They should obtain and preserve the document issued specifically for their protection.

What If the Contractor Says a Bank Guarantee Is Too Expensive?

Contractors may argue that strong financial security increases construction costs.

That may be commercially true.

However, owners should compare the cost of protection with the potential consequences of an unfinished project.

If the old building is demolished and the contractor becomes insolvent halfway through construction, completing the project can require substantial additional funding.

The appropriate question is not whether security has a cost.

It is whether the project’s risk allocation remains acceptable without adequate security.

Temporary-Rent Obligations May Need Separate Security

The statutory project-completion security should not automatically be assumed to cover every temporary-rent obligation promised by the contractor.

If temporary rent is financially important to owners, the private agreement should address it clearly.

For example, the agreement can define the amount, payment date, duration and consequences of default.

Depending on the project and negotiations, owners can consider whether additional financial protection for important monetary obligations is commercially appropriate.

This is particularly relevant where owners will depend on contractor-funded accommodation for several years.

Additional Owner Payments Should Also Be Protected

Some redevelopment projects require owners to make substantial additional payments.

If large sums are paid early and the contractor later fails, owners can face both an unfinished building and difficulty recovering their money.

The payment schedule should therefore be connected, where appropriate, to objectively verifiable construction milestones.

Owners should preserve bank records for all payments.

Cash payments or undocumented transfers can make later claims considerably more difficult.

Do Not Release Security Too Early

The contractor may request the return or release of security before all important obligations have been completed.

Owners should be cautious.

The current statutory regime generally links release of the statutory security to completion in accordance with the agreement and specifications and obtaining the relevant occupancy documentation.

Private guarantees should also contain a release mechanism appropriate to the risks they secure.

Physical completion alone may not resolve outstanding defects, documentation problems or other contractual obligations.

What Happens to Statutory Security If the Contractor Fails to Complete the Project?

The implementing regulation directly addresses this situation.

Where the project or construction is not completed in accordance with the contract and specifications, the security can be converted into money and transferred toward the person or entity that undertakes completion. Any remaining amount after the project has been completed is returned to the party that provided the security.

This makes the statutory mechanism particularly relevant when owners need to move from a failed contractor to a completion strategy.

However, the security amount may not necessarily equal the total cost of completing an abandoned project.

Security Should Be Combined With a Strong Termination Mechanism

Financial protection alone is not enough.

If the contractor stops construction, owners must also have a legal path to end the failed relationship and reorganize the project.

The urban transformation framework contains a special termination mechanism in qualifying circumstances involving contractor-caused failure to begin construction or prolonged cessation of construction.

The private contract should also contain carefully drafted default and termination provisions.

Security provides financial protection; termination provides a legal route out of a failed contractor relationship.

Both are important.

Guarantees Should Cover the Period When Owners Are Most Exposed

The greatest risk often begins after demolition.

Owners have lost the use of their original properties, construction has not yet been completed and the contractor may already control valuable project rights.

Security should remain effective during this vulnerable period.

Owners should therefore compare guarantee expiry dates with the realistic project timetable rather than the contractor’s most optimistic schedule.

If the project is delayed, necessary extensions should be addressed before the security expires.

Foreign Property Owners Should Obtain Copies of Every Security Document

Foreign owners living abroad should maintain a complete digital security file.

It should contain the construction agreement, guarantee documents, statutory-security records, building completion insurance documentation where applicable, individual protection certificates, title records and construction-progress reports.

Owners should not rely on the building manager, contractor or another owner to preserve these documents indefinitely.

If the contractor later becomes insolvent, immediate access to the documents can materially affect the owner’s ability to respond.

Warning Signs That Security May Be Inadequate

Owners should investigate further if the contractor refuses to provide copies of security documentation, cannot explain which protection mechanism applies, claims that a verbal commitment from a bank is sufficient, requests extensive title transfers before construction, proposes a guarantee expiring long before realistic project completion or insists that security can be released while substantial obligations remain unfinished.

Another warning sign is inconsistency between what the contractor tells owners and what the actual guarantee document states.

The written instrument controls its own legal operation.

Marketing explanations should never replace document review.

2026 Practical Legal Strategy

The first priority is identify which protection mechanism applies to the project. Determine whether the contractor has provided the statutory security required by the urban transformation framework or qualifying building completion insurance.

The second priority is verify the amount and validity. For private redevelopment on risky-building parcels, the current consolidated regulation generally requires security equal to 6% of the approximate construction cost before the construction permit, subject to the applicable exceptions.

The third priority is distinguish statutory security from a private bank guarantee. They are not automatically the same instrument and may protect owners in different ways.

The fourth priority is consider whether additional contractual security is appropriate, particularly where owners make substantial payments or transfer valuable property rights.

The fifth priority is control title transfers. A guarantee should not be used as an excuse to transfer disproportionate value to the contractor before corresponding construction has been completed.

The sixth priority is link payments and contractor economic benefits to measurable progress. The regulatory framework itself uses construction progress as a control for qualifying sales of contractor units.

The seventh priority is check building completion insurance carefully if it is the chosen protection mechanism. Each owner should obtain and verify the individual protection certificate applicable to their rights.

The eighth priority is monitor expiry dates. Protection should remain effective through the period in which owners continue to face substantial completion risk.

The ninth priority is combine financial security with strong contractor-default and termination provisions.

The tenth priority is never wait until contractor insolvency to investigate the guarantee. By that stage, correcting weaknesses in the original security structure may be impossible.

The central principle is straightforward: the purpose of security in an urban transformation project is to prevent property owners from being left almost entirely dependent on the financial health of the contractor. The strongest protection combines legally compliant security, carefully drafted contractual guarantees where appropriate, building completion insurance where used, controlled title transfers, progress-based payments and continuous construction monitoring.

Frequently Asked Questions

1. Is contractor security mandatory in urban transformation projects?

For qualifying projects within the current urban transformation framework, security or the applicable alternative protection is required before the construction permit. The exact requirements depend on the category of project.

2. What is the current security rate for private construction on a risky-building parcel?

Under the current consolidated implementing regulation, the contractor generally provides security equal to 6% of the approximate construction cost before obtaining the construction permit, subject to the applicable exceptions.

3. Is the statutory security always a bank guarantee?

No. The regulation accepts the forms of security recognized under the relevant public procurement rules. Owners should therefore inspect the actual security instrument rather than automatically describing every form of protection as a bank guarantee.

4. Can owners request additional contractual guarantees?

Depending on the project and negotiations, additional contractual financial security can be considered. The statutory mechanism does not prevent owners from carefully structuring their private contractual risk allocation where legally permissible.

5. What happens to statutory security if construction is not completed?

The regulation provides that the security can be converted into money and directed toward the person or entity undertaking completion of the project.

6. Can building completion insurance replace the statutory security?

Where qualifying building completion insurance is obtained in accordance with the applicable rules, the separate security requirement under the relevant implementing provision is not required in the same way.

7. Does building completion insurance protect against contractor bankruptcy?

The official insurance guidance identifies contractor bankruptcy as a covered trigger under the applicable framework, subject to the policy, protection certificate and insurance conditions.

8. Should every property owner receive an insurance protection certificate?

Where building completion insurance is used and the relevant conditions are satisfied, the official guidance provides for individual protection certificates for property owners. Owners should verify that their own certificate has been issued and that the protection amount and validity information are correct.

9. Does a guarantee make it safe to transfer all land shares to the contractor immediately?

No. Financial security and title-transfer risk should be managed separately. Controlled or staged transfers linked to measurable construction progress can provide additional protection where appropriate.

10. When should owners check the contractor’s guarantees?

Before signing important project documents and certainly before substantial payments or property transfers occur. The protection should then be monitored throughout construction, including its validity and any proposed release or replacement.

Legal Protection Through Guarantees in Urban Transformation Projects

A contractor’s promise to complete a new building is valuable only if owners have meaningful protection when that promise cannot be performed.

For this reason, statutory security, bank guarantees and building completion insurance should not be treated as technical paperwork.

Property owners should know which protection mechanism applies, the amount protected, its duration, the conditions for enforcement and what happens if the contractor becomes insolvent or abandons construction.

Foreign owners should pay particular attention to these issues before transferring land shares or making substantial additional payments because recovering value after contractor failure can be considerably more difficult than structuring the project safely from the beginning.

Fırat Fesih Kaya Law Office provides legal assistance to foreign property owners and investors concerning financial security in urban transformation projects.

Lawyer Fırat Fesih Kaya assists property owners with contractor-agreement review, bank guarantee clauses, statutory contractor security, building completion insurance, protection certificates, staged title transfers, progress-based payment structures, contractor insolvency, construction default, termination and unfinished-project disputes.

Phone: +90 312 434 22 22
WhatsApp: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr