Who Pays Additional Construction Costs During Urban Transformation in Turkey? (2026 Updated Guide)

Who must pay additional construction costs during urban transformation in Turkey? Learn when property owners may be required to contribute, when contractors bear cost increases, how fixed-price clauses work, and what owners can do against unexpected payment demands.

One of the most serious disputes in an urban transformation project can arise after demolition, when the contractor suddenly asks property owners for additional money.

The contractor may claim that construction materials have become more expensive, labor costs have increased, financing has become difficult, the original budget is no longer sufficient or unexpected technical work is required.

Property owners often ask whether they are legally required to pay.

There is no universal rule stating that every additional construction cost must automatically be paid by property owners. The answer depends heavily on the redevelopment agreement, the agreed financial model, the reason for the additional cost and which party contractually assumed that particular risk.

If the contractor agreed to reconstruct the building in return for specified property rights without additional owner payments, a later increase in the contractor’s ordinary construction expenses does not automatically create an unrestricted right to demand more money.

On the other hand, where the agreement expressly requires owners to contribute to construction costs or contains a valid price-adjustment mechanism, additional payments may become relevant.

Lawyer Fırat Fesih Kaya assists foreign property owners with additional construction-cost demands, redevelopment agreements, contractor disputes, construction delays and financial risks arising during urban transformation.

The Redevelopment Agreement Is the Starting Point

The first document that must be examined is the agreement between the property owners and contractor.

The agreement should explain how reconstruction is financed.

In some projects, the contractor receives certain new independent units or development rights in exchange for constructing replacement apartments for the existing owners.

In others, owners must make direct cash contributions.

Some projects combine contractor units, owner contributions and public financial support.

The agreement should therefore establish what each party contributes and what each party receives.

Are Owners Automatically Responsible for Construction Cost Increases?

No.

An increase in the contractor’s actual construction expenses does not by itself prove that owners owe additional money.

If the contractor accepted responsibility for constructing the agreed project for an agreed consideration, ordinary commercial cost increases may form part of the contractor’s assumed business risk depending on the contractual structure.

The contractor cannot simply send owners a new price list and assume that the original agreement has automatically changed.

The contractual basis of the demand should be identified.

What If the Contract Contains a Fixed-Price Provision?

A fixed-price structure can provide important protection.

If the owners agreed to pay a clearly defined construction contribution and the agreement treats that amount as fixed, a contractor’s later request for additional money requires careful legal examination.

The contractor may argue that extraordinary circumstances justify adjustment.

However, that is different from having a general unilateral right to increase the agreed price whenever construction becomes more expensive.

Owners should not sign a revised payment schedule merely because the contractor says costs have increased.

What If the Contract Allows Price Adjustments?

The adjustment mechanism should be examined closely.

A well-drafted provision should identify when an adjustment can occur and how it will be calculated.

It may refer to an objective index, specified construction inputs or another measurable formula.

A clause stating merely that owners must pay “any additional construction costs” can generate significant disputes concerning its scope.

The contractor should not automatically have unlimited discretion to determine both the existence and amount of an additional payment.

Inflation Can Cause Disputes but Does Not Automatically Rewrite the Contract

Long construction projects can experience substantial inflation.

Materials, wages, transportation and financing can all become more expensive.

Nevertheless, the legal consequences depend on the agreement and applicable contract law.

The existence of inflation does not mean that every contractor can automatically transfer all increased costs to owners.

The contract’s pricing structure, allocation of risk and circumstances affecting performance must be examined.

What If the Contractor Says the Project Is No Longer Profitable?

Loss of expected profit does not automatically mean that owners must restore the contractor’s profit margin.

Contractors undertake commercial risk when entering construction agreements.

Whether an exceptional change in circumstances creates any legal basis for contractual adaptation is a separate legal question requiring examination of the particular facts.

Owners should distinguish genuine legal claims concerning extraordinary circumstances from an ordinary attempt to renegotiate an unfavorable commercial deal.

Can Owners Be Charged for Additional Square Meters?

Potentially, yes.

This is different from a general increase in construction costs.

An owner may agree to receive a replacement apartment larger than the unit originally allocated under the redevelopment agreement.

The additional area may have an agreed price per square meter.

In that situation, the owner’s additional payment can arise from receiving additional value rather than from the contractor simply experiencing higher costs.

The agreement should identify the additional area and calculation method clearly.

What If the Owner Requests Better Materials?

Optional upgrades can also create legitimate additional costs.

Suppose the technical specification requires a standard kitchen, flooring system or bathroom installation.

If an owner requests significantly more expensive materials, the contractor may seek payment for the difference if that arrangement is agreed.

However, the contractor should not classify materials already required under the technical specification as “optional upgrades” merely to demand additional money.

The original technical specification must therefore be preserved.

Who Pays for Mandatory Construction Changes?

This can be more complicated.

During the permitting or construction process, authorities may require modifications to the project.

Structural conditions may also reveal necessary work that was not anticipated.

Responsibility for these costs depends on the agreement, the reason for the change and which party assumed the relevant risk.

Owners should request technical documentation explaining why the additional work is necessary before accepting the contractor’s calculation.

What If Unexpected Ground Conditions Increase Costs?

Foundation and ground-improvement expenses can be substantial.

A contractor may discover that additional structural measures are required after detailed technical work.

Whether the owner must contribute depends on the redevelopment agreement and allocation of geological and construction risks.

The contractor should provide technical reports and a transparent cost calculation.

An unsupported statement that “the ground is difficult” should not be treated as sufficient justification for a major additional payment.

What If the Contractor Made the Original Calculation Incorrectly?

A contractor’s inaccurate commercial calculation does not automatically become the owners’ financial responsibility.

If the contractor underestimated ordinary labor, materials or project costs, the legal consequences should be assessed under the agreement.

This is particularly important where the contractor won the project by offering substantially better financial terms than competing contractors and later attempts to recover the difference from owners.

Owners should examine whether the additional demand represents a genuine contractual adjustment or merely correction of the contractor’s own pricing mistake.

Can the Contractor Stop Construction Until Owners Pay More?

This should not automatically be accepted as lawful.

The contractor’s right to suspend performance depends on whether there is actually a valid and due payment obligation.

If owners genuinely owe an agreed installment and fail to pay, contractual consequences may arise.

But if the additional payment itself is disputed and has no clear contractual basis, stopping construction can expose the contractor to allegations of default.

Owners should document any written threat to suspend construction.

What If Construction Has Already Stopped?

The situation becomes more serious.

Owners should determine whether the contractor has stopped because of a genuine payment dispute, broader financial distress or inability to complete the project.

Construction progress should be documented.

The property registry should be checked where contractor units or ownership interests have already been transferred.

Mortgages, attachments and third-party transfers can significantly affect the owners’ position.

Can the Contractor Demand Additional Money After Demolition?

A demand made after demolition requires particular caution.

Once the old building has disappeared, owners have substantially less practical bargaining power.

They cannot simply return to their previous apartments.

For that reason, owners should insist on a clear financial structure before demolition.

An unexpected demand after demolition should be compared with the original contract, technical specifications, project documents and agreed allocation schedule.

Can the Majority Decide That All Owners Must Pay More?

Majority decision-making under the urban transformation framework should not be confused with an unlimited power to impose arbitrary new financial obligations.

Current official guidance confirms that where unanimity cannot be reached, decisions concerning the new application can generally be taken by owners representing a simple majority of ownership shares under the applicable statutory procedure.

However, the legal effect of a later change to the financial terms must still be assessed according to the existing agreements and applicable law.

A majority vote does not automatically rewrite every owner’s previously signed contract.

What About an Owner Who Never Signed the Contractor Agreement?

This situation requires separate analysis.

Current urban transformation rules provide a statutory procedure for owners who do not join the redevelopment decision supported by the required share majority.

The majority decision, agreement terms and statutory notification procedure become important.

The owner’s position should therefore be evaluated under both the urban transformation framework and the proposed contractual terms.

An owner should not simply ignore a properly initiated majority procedure because of disagreement over construction contributions.

What Happens If an Owner Refuses a Valid Additional Payment?

If the agreement clearly requires a particular additional payment and the obligation has become due, refusal can create contractual default.

The contractor may seek payment and other remedies available under the agreement and applicable law.

The owner should therefore distinguish between an unsupported demand and a payment obligation already accepted in the contract.

Refusing every request without examining the agreement can be as risky as paying every request without questioning it.

Owners Should Demand a Written Cost Breakdown

Before paying an unexpected amount, owners should request a detailed written explanation.

The contractor should identify why the additional cost arose.

The relevant contractual clause should be identified.

The calculation method should be explained.

Where the request concerns additional construction work, technical evidence should support the claim.

Owners should also ask whether the requested amount includes contractor profit or only actual additional expenditure.

Independent Technical Review Can Be Important

Large additional-cost claims should not be evaluated solely from the contractor’s spreadsheet.

An independent technical expert may be able to determine whether the claimed work was genuinely additional or already part of the original construction obligation.

The expert can also assess quantities, progress and the relationship between the requested payment and actual construction.

This is particularly valuable where the contractor demands a substantial contribution from every owner.

Independent Legal Review Is Equally Important

Technical necessity does not automatically establish legal responsibility.

An additional structural measure may genuinely be necessary, but the contract may still place that risk on the contractor.

Conversely, a technically unexpected item may fall within an owner-funded category under the agreement.

Technical and contractual analysis should therefore be performed together.

Can Owners Ask to See Invoices?

Where the contractor relies on actual cost increases to justify an adjustment, supporting financial documents can become important.

The precise disclosure obligation depends on the agreement and dispute.

Owners should nevertheless seek sufficient evidence to understand how the amount was calculated.

A round-number demand sent to every owner without supporting information should be approached cautiously.

Public Financial Support Can Reduce the Owner Contribution

Urban transformation projects can benefit from various financial-support mechanisms depending on the project and eligibility conditions.

The Urban Transformation Directorate currently publishes information concerning grants, loans, rental assistance and interest support.

Certain qualifying projects also benefit from dedicated construction-support programs.

These mechanisms can reduce the amount that owners need to fund directly, but they do not automatically change the contractual allocation of every additional cost.

Current Support Programs Should Be Checked Before Owners Pay More

For qualifying projects, public financial support can materially alter the redevelopment budget.

For example, current official programs include grant and loan structures under which funds are transferred according to construction progress.

Where such support applies, owners should determine whether the contractor’s additional demand properly takes those funds into account.

A contractor should not calculate the owners’ remaining contribution without transparently identifying relevant project funding.

Grants and Loans Should Not Be Confused

A grant reduces the project’s financial burden without creating the same repayment obligation as a loan.

A loan provides financing but ultimately creates debt according to the applicable repayment conditions.

When a contractor tells owners that “government support will pay the difference,” owners should ask exactly which type of support is being discussed.

The economic effect can be very different.

Public-Led Redevelopment Can Use a Different Cost Model

Not every urban transformation project is a private contractor arrangement.

In certain public-led applications, the value of the owner’s existing property and the construction cost of the replacement property can be compared.

Where the calculated replacement-property cost exceeds the value credited to the owner, the owner may become indebted under the applicable project structure.

The payment terms can then be determined under the relevant public redevelopment program.

This should be distinguished from a private contractor unexpectedly demanding additional money.

Can Additional Costs Be Divided According to Land Shares?

There is no universal rule that every additional private construction cost must always be divided exclusively according to land shares.

The contract and nature of the expense matter.

A common structural expense may be allocated differently from the price of additional square meters requested by one owner.

Optional improvements should generally be distinguished from common project costs.

The calculation methodology should therefore be clearly defined.

Equal Payment Per Apartment Can Also Be Problematic

A contractor may simply divide a new cost equally among all apartments.

That method is not necessarily appropriate in every project.

Independent units may differ in size, allocation, land share and additional benefits received.

Whether equal division is legally and contractually justified depends on the agreement and nature of the expense.

Owners should request an explanation of the allocation methodology.

Foreign Owners Should Compare Their Demand With Other Owners

A foreign property owner should verify whether the same payment methodology is being applied consistently.

Foreign nationality should not itself justify a higher construction contribution.

If a foreign owner receives a substantially larger demand than comparable owners, the contractor should explain the objective reason.

The difference may be legitimate if the owner receives additional area or upgraded specifications, but it should be documented.

Do Not Sign a New Debt Acknowledgment Without Review

A contractor requesting additional money may ask owners to sign a new protocol.

The document may describe the amount as an acknowledged debt.

It may contain a revised payment schedule.

It may also waive existing delay claims or extend the construction deadline.

Owners should read the entire document rather than focusing only on the additional payment figure.

Signing can materially change the legal position.

Additional Payment Agreements Can Affect Delay Claims

A contractor may offer to continue construction if owners agree to additional funding.

In return, the contractor may request a new delivery date.

Accepting the new date can affect claims based on the original deadline.

The protocol may also attempt to release the contractor from previous defaults.

Owners should calculate the value of existing claims before accepting revised terms.

What If Some Owners Pay and Others Refuse?

This can create significant project tension.

The legal position depends on whether the payment obligation already exists or is being introduced through a new arrangement.

Owners who pay voluntarily may later dispute whether others should contribute.

Owners who refuse may face claims if the payment was contractually due.

The issue should be resolved through a clear legal analysis rather than informal pressure among owners.

Can Owners Recover Additional Payments Made Under Protest?

Potentially, depending on the circumstances and legal basis.

An owner may pay because construction would otherwise stop and later argue that the contractor had no right to demand the money.

Whether recovery is possible depends on the agreement, payment circumstances, reservations made and applicable legal principles.

If an owner believes payment is legally disputed but feels commercially compelled to pay, the legal consequences should ideally be considered before the transfer.

Contractor Financial Distress Is a Major Warning Sign

An additional-payment demand can sometimes be the first indication that the contractor has serious liquidity problems.

Owners should investigate whether construction workers and suppliers are being paid.

Construction progress should be monitored.

Property rights already transferred to the contractor should be checked.

If additional demands are accompanied by prolonged inactivity, the problem may no longer be merely a pricing dispute.

Do Not Keep Funding an Unviable Project Without Investigation

Owners can become trapped in repeated requests.

The contractor asks for one additional contribution to finish the structural system.

A few months later, another amount is requested for mechanical works.

Then another payment is demanded for completion.

Before continuing, owners should determine the true remaining construction cost and whether the contractor has the capacity to finish the project.

An independent completion-cost assessment can become essential.

Can the Contractor Agreement Be Terminated?

In serious cases, potentially.

Ordinary contractual remedies depend on the agreement and applicable law.

In addition, the urban transformation framework contains a special mechanism for certain serious contractor failures, including specified situations where construction attributable to the contractor has not begun within the required period or has effectively remained stopped for the statutory period.

Termination should nevertheless be approached carefully because existing transfers, completed work and third-party rights must be addressed.

Additional Costs After Contractor Replacement

Replacing a failed contractor does not necessarily eliminate additional financial burdens.

A new contractor may require more money to finish partially completed construction.

Owners may therefore suffer both claims against the original contractor and new completion costs.

The amount needed to complete the project should be professionally assessed before owners approve a replacement arrangement.

Can Owners Claim Damages From the Original Contractor?

Potentially, where contractor breach causes recoverable loss.

If the contractor unjustifiably abandons the project and owners must pay substantially more to another contractor for completion, the additional expenditure may become relevant to a damages analysis.

However, causation, contractual responsibility and the amount of loss must be established.

The financial records of both the original and replacement arrangements should therefore be preserved.

Evidence Owners Should Preserve

Owners should retain the original redevelopment agreement, technical specifications and allocation schedules.

Every amendment and payment protocol should be preserved.

Bank transfers and receipts should be organized.

Written contractor demands should be retained.

Technical reports explaining alleged additional work can be important.

Construction-progress photographs and reports should also be collected.

If the dispute becomes serious, this evidence can determine whether the additional cost was genuinely the owner’s responsibility.

2026 Practical Legal Strategy

The first priority is do not assume that every increase in construction costs must automatically be paid by property owners.

The second priority is review the redevelopment agreement and identify whether the price is fixed, adjustable or partly owner-funded.

The third priority is distinguish ordinary contractor cost increases from owner-requested additional area or optional upgrades.

The fourth priority is request a written and technically supported explanation for every substantial additional-payment demand.

The fifth priority is determine whether the alleged additional work was already included in the original technical specification.

The sixth priority is check available public grants, loans and other financial support before calculating the owners’ remaining contribution.

The seventh priority is do not sign debt acknowledgments, revised deadlines or payment protocols without reviewing their effect on existing rights.

The eighth priority is investigate contractor financial health if repeated additional-payment requests are accompanied by construction delays.

The ninth priority is obtain an independent completion-cost assessment before injecting substantial additional funds into a troubled project.

The tenth priority is consider broader contractual and statutory remedies where additional-payment demands are connected with contractor abandonment or serious default.

The central principle is clear: additional construction costs during urban transformation are not automatically the responsibility of property owners. Liability depends on the redevelopment agreement, the reason for the increased cost, the project’s financial model and the contractual allocation of risk. Owners should establish the legal basis of the demand before transferring additional money.

Frequently Asked Questions

1. Must property owners pay every construction cost increase?

No. An increase in the contractor’s actual expenses does not automatically create an obligation for owners to pay more. The redevelopment agreement and allocation of risk must be examined.

2. Can a contractor increase the agreed price because of inflation?

Not automatically. Inflation may be relevant depending on the contract and circumstances, but it does not give the contractor an unrestricted unilateral right to rewrite the financial terms.

3. What if the redevelopment agreement contains a fixed price?

A fixed-price structure can significantly affect the contractor’s ability to demand additional payments. The exact wording and circumstances must be reviewed.

4. Can an owner be required to pay for additional square meters?

Yes, where the owner agreed to receive additional area and the agreement requires payment for it. This should be distinguished from an unexpected general construction-cost increase.

5. Who pays for optional upgrades requested by one owner?

Where an owner voluntarily requests materials or features exceeding the agreed technical specification, the owner may be responsible for the agreed additional cost.

6. Can the contractor stop construction if owners refuse additional payment?

That depends on whether a valid payment obligation actually exists. If the additional demand has no contractual basis, suspension of construction can create separate contractor-default issues.

7. Can the majority force every owner to accept any new construction price?

The statutory majority system does not give unlimited authority to impose arbitrary financial obligations. Existing contracts, the majority decision and applicable urban transformation procedures must all be examined.

8. Can foreign owners be charged higher construction costs?

Foreign nationality alone should not justify a higher contribution. Any difference should have an objective contractual or project-related basis.

9. What should I do before paying an unexpected additional amount?

Request the contractual basis, detailed calculation and technical explanation. Review the original technical specification and determine whether the alleged additional work was already included.

10. What if repeated additional-payment demands suggest the contractor cannot finish the project?

The contractor’s financial position, construction progress, property transfers and remaining completion cost should be investigated immediately. Owners may need to consider remedies extending beyond the payment dispute.

Legal Assistance With Additional Construction Costs

Unexpected additional construction costs can fundamentally change the economics of an urban transformation project.

The greatest risk arises when the old building has already been demolished and owners are told that construction will not continue unless they provide additional money.

At that stage, owners should not make decisions based solely on pressure from the contractor.

The original redevelopment agreement, technical specifications, construction progress, reason for the additional cost and available public support should be reviewed together.

For foreign property owners, independent review is particularly important where they are managing the project from abroad and depend heavily on information provided by the contractor.

Fırat Fesih Kaya Law Office provides legal assistance to foreign property owners and investors involved in urban transformation disputes.

Lawyer Fırat Fesih Kaya assists with additional construction-cost demands, contractor payment disputes, fixed-price agreements, construction delays, project amendments, contractor default, completion-cost disputes and protection of property owners in unfinished redevelopment projects.

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