What can foreign buyers do when an apartment in Turkey is smaller than advertised or contracted? Learn about measurement disputes, price reduction, contract cancellation, compensation, developer liability and evidence in 2026.

Foreign buyers sometimes discover after purchasing an apartment in Turkey that the property is significantly smaller than the area stated in the contract, advertisement, brochure, floor plan or developer’s sales presentation. A difference in square meters can materially affect both the property’s market value and the buyer’s decision to purchase it.

A smaller-than-promised apartment can potentially constitute defective or non-conforming property where the actual characteristics do not correspond with the contractual or advertised characteristics. Official consumer guidance confirms that a product may be defective when it does not possess characteristics agreed by the parties or stated in advertisements and announcements, or where deficiencies reduce its value or the benefits reasonably expected by the consumer.

Depending on the circumstances, a foreign purchaser may potentially seek a proportionate reduction in the purchase price, withdrawal from the contract, another available statutory remedy and compensation for provable losses. The correct remedy depends on the size of the discrepancy, contractual wording, how the area was represented, whether the buyer purchased as a consumer and whether the developer or seller disclosed the true measurements.

For foreign buyers purchasing apartments in Ankara, Istanbul, Izmir, Mersin, Bursa and throughout Turkey, an independent measurement and careful comparison of the contract, approved plans and marketing documents can therefore be essential.

When Is an Apartment Legally “Smaller Than Promised”?

Not every difference between two square-meter figures necessarily establishes a legal defect.

The first issue is determining what measurement was actually promised.

A developer may have described an apartment using gross area, net usable area, total saleable area or another calculation incorporating portions of common areas. If the buyer and seller were clearly referring to different measurement concepts, the dispute may involve interpretation rather than straightforward missing floor area.

The situation becomes much more serious where the contract expressly promises a particular usable area but professional measurement shows a materially lower figure.

For example, an apartment expressly sold as having 150 square meters of usable area may present a significant contractual problem if the buyer later receives only 125 square meters of comparable usable area.

Why Is the Difference Between Gross and Net Area Important?

Foreign buyers should never compare two square-meter figures without determining how each was calculated.

A marketing brochure may state a large gross figure while the apartment’s actual internal usable area is considerably smaller because the calculation includes walls or portions associated with common areas.

The legal question is therefore not simply:

“How many square meters is the apartment?”

It is:

“What measurement method was promised, and what does the apartment actually provide when measured on the same basis?”

A qualified architect, engineer or other appropriate technical professional may be necessary to establish the discrepancy objectively.

Can an Incorrect Square-Meter Representation Constitute Defective Property?

Potentially, yes.

Consumer Protection Law No. 6502 treats property as defective where it fails to conform to the contract, including circumstances where it does not possess characteristics represented by the seller or contained in advertising and announcements. Official Ministry of Trade guidance also explains that deficiencies reducing the property’s value or the benefit reasonably expected by the consumer can constitute non-conformity.

Accordingly, the developer cannot necessarily avoid responsibility merely because the title transfer was completed.

The buyer may have acquired ownership and still retain claims arising from the difference between what was promised and what was delivered.

What Rights Can the Foreign Buyer Have?

Where the consumer-law regime applies and the apartment qualifies as defective, the purchaser has four principal alternative remedies: withdrawal from the contract, retaining the property and demanding a proportionate reduction in the price, requesting free repair where appropriate and requesting replacement with a defect-free equivalent where possible.

For a permanently smaller apartment, physical repair may obviously be unrealistic.

Consequently, price reduction and, in sufficiently serious circumstances, withdrawal from the contract can become particularly important remedies.

The practical remedy must be selected according to the facts of the transaction.

Can the Buyer Demand a Price Reduction?

Yes, where the applicable requirements are satisfied.

Keeping the property while demanding a reduction proportionate to the defect is expressly recognized under consumer law.

This can be particularly appropriate where the buyer still wants the apartment but received materially less space than was promised.

However, calculating the reduction should not automatically consist of dividing the total purchase price by the advertised number of square meters and multiplying it by the missing area.

Property valuation can depend on location, floor, view, layout, common facilities, construction quality and other characteristics.

Expert valuation may therefore be required to determine the economic effect of the missing area.

Can the Buyer Cancel the Property Purchase?

Potentially.

Withdrawal from the contract is also one of the statutory remedies available to a consumer receiving defective property.

Whether cancellation is appropriate depends on the seriousness of the discrepancy and the particular circumstances.

An apartment promised as 150 square meters but measuring 148 square meters may create a different legal assessment from an apartment marketed and contracted as 150 square meters but actually providing only 110 square meters on the same measurement basis.

The larger the discrepancy and the more central the promised size was to the purchase decision, the stronger the argument may become that the buyer did not receive what was contractually promised.

Can the Buyer Recover the Purchase Price After Withdrawal?

Where the consumer validly exercises the right to withdraw because of defective property, Consumer Protection Law No. 6502 provides that the amount paid must be returned. The legislation also permits a consumer to seek compensation under the applicable general obligations framework together with the statutory remedies.

Real-estate transactions can nevertheless involve additional complications because registered ownership has already been transferred.

For that reason, withdrawal from a completed property acquisition should be legally structured rather than treated as a simple retail refund.

Can the Buyer Claim Additional Compensation?

Potentially.

The buyer may have suffered losses beyond the difference in square meters.

Depending on the circumstances, losses may relate to reduced market value or other financial consequences caused by the non-conforming delivery.

Consumer Protection Law No. 6502 expressly preserves the possibility of seeking compensation together with the statutory alternative remedies.

Actual compensation depends on proof of loss and causation.

What If the Contract States the Correct Area but the Advertisement Was Wrong?

The advertisement should not automatically be ignored.

Official consumer guidance confirms that characteristics contained in advertisements, announcements and similar representations can be relevant when determining whether a product conforms to what was promised.

Suppose a foreign buyer repeatedly receives advertisements describing an apartment as 180 square meters and purchases specifically because of that size, but later receives contractual documentation containing different or ambiguous measurements.

The complete sales process should be investigated.

The developer’s website, advertisements, brochures, emails, floor plans and messages may help establish what representation actually induced the purchase.

What If the Contract Says “Approximately” 150 Square Meters?

The word “approximately” does not necessarily authorize an unlimited discrepancy.

A reasonable construction tolerance and a substantial reduction are different matters.

The precise language of the contract, measurement methodology, technical plans and magnitude of the discrepancy should be considered together.

A developer should not automatically be able to promise approximately 150 square meters and deliver dramatically less usable space while relying on one qualifying word.

What If the Buyer Signed a Delivery Document?

Signing a handover document does not necessarily eliminate every later claim.

Some discrepancies may not be apparent without professional measurement or comparison with approved plans.

However, the contents of the delivery document are important evidence.

If the buyer expressly accepted a known discrepancy, the seller may rely on that acknowledgment. Consumer law also recognizes that where a consumer knew of a defect when entering the contract, the legal analysis changes.

Foreign buyers should therefore avoid signing broad statements that the property is completely compliant before conducting an appropriate inspection.

What Evidence Should the Buyer Collect?

The buyer should preserve the purchase agreement, preliminary agreement, reservation documents, advertisements, brochures, floor plans, developer website materials, emails, messages, payment records and handover documents.

An independent technical measurement is often central.

The measurement should clearly distinguish the relevant area concepts and compare the delivered apartment with the same measurement methodology used in the contractual or marketing representation.

Where litigation is likely, formal preservation of evidence may be considered before alterations are made to the property.

Are Developer Brochures Important Evidence?

Yes.

Foreign buyers frequently make purchase decisions before construction is completed and therefore rely heavily on promotional material.

If the brochure contains a floor plan and expressly states a particular apartment area, it can be relevant to determining what was represented.

Official Ministry guidance confirms that advertised characteristics can form part of the assessment of whether the delivered property is defective or non-conforming.

Buyers should therefore save brochures and digital advertisements before they disappear from the developer’s website.

What About WhatsApp Messages from the Sales Representative?

They can be relevant evidence.

Suppose a sales representative repeatedly tells the buyer that the apartment has 160 square meters of usable interior space. After delivery, an architect measures only 132 square meters using the same concept.

Those communications can help establish what was represented before the buyer signed or paid.

Original digital records should be preserved whenever possible rather than relying solely on cropped screenshots.

What If the Floor Plan Is Different from the Completed Apartment?

This can create a separate or additional non-conformity issue.

A buyer may receive the correct total area but a materially different layout. Alternatively, both the layout and area may differ.

Examples include a missing room, smaller balcony, reduced kitchen, altered bathroom configuration or conversion of promised private space into common space.

The contractual plans and approved project documents should therefore be compared with the completed apartment.

What If the Balcony or Terrace Was Included in the Advertised Area?

This is a frequent source of disputes.

The buyer should establish exactly how balconies, terraces and common areas were included in the stated measurement.

A developer may advertise a large headline figure while the buyer assumes that it represents internal usable space.

Clear contractual definitions are therefore extremely important.

Where marketing was misleading or materially ambiguous, the complete circumstances surrounding the sale should be evaluated rather than looking at one number in isolation.

What If the Apartment Was Bought Off-Plan?

The issue can be particularly important in off-plan purchases because the buyer cannot physically measure the finished apartment before signing.

The purchaser relies on plans, specifications, brochures and representations.

Current Ministry of Trade guidance concerning prepaid residential sales emphasizes formal consumer protections, including pre-contract information and contractual documentation.

Foreign buyers purchasing before completion should therefore insist that the contract precisely identifies the apartment, promised area and measurement methodology.

What Is the Limitation Period?

Where the consumer-law rules governing defective residential property apply, liability is generally subject to a five-year limitation period from delivery unless another law or the contract provides a longer period. For second-hand residential and holiday property, the seller’s liability period cannot generally be less than three years.

There is an important exception.

Official Ministry guidance states that ordinary limitation provisions do not apply where the defect has been concealed through gross fault or fraud.

Foreign buyers should nevertheless act promptly instead of waiting for the limitation period to approach.

What If the Size Discrepancy Is Discovered Within Six Months?

Consumer law provides an important evidentiary presumption.

A defect appearing within six months after delivery is presumed to have existed at the time of delivery unless that presumption is incompatible with the nature of the property or defect. In such circumstances, the burden of proving that the property was not defective falls on the seller.

A physical area discrepancy will usually arise from the property as constructed rather than from something the purchaser subsequently did.

Early professional measurement can therefore be especially useful.

What If the Developer Intentionally Misrepresented the Size?

Evidence of deliberate concealment or misrepresentation can materially change the case.

For example, suppose internal company plans clearly show an apartment significantly smaller than the figure repeatedly given to foreign purchasers.

The buyer should preserve any evidence indicating that the seller knew the true dimensions.

Official consumer guidance states that the ordinary limitation rules do not apply where the defect was concealed through gross fault or fraud.

Deliberate deception may also require examination under legal grounds beyond an ordinary defective-property claim.

Does the Rule Apply Only to Foreign Buyers?

No.

Foreign buyers receive the applicable legal protections because of the nature of their transaction, not because a separate defective-property system exists only for foreigners.

Where a foreign individual purchases residential property for personal purposes from a professional seller or developer, consumer protection rules may apply if the statutory requirements are satisfied.

A company purchasing apartments or commercial property for business or investment purposes may face a different legal framework.

The purchaser’s legal status and purpose of acquisition should therefore be established at the beginning.

Can the Buyer Proceed Against Both the Developer and Seller?

Potentially, depending on their roles.

Sometimes the developer and seller are the same legal entity. In other developments, the landowner, developer, contractor and selling company may be different entities.

The purchase contract, title records and project documentation should be reviewed to identify the correct responsible parties.

Foreign buyers should not assume that a famous project brand is necessarily the legal entity against which the claim must be brought.

Practical Example: 150 Square Meters Promised, 125 Delivered

A foreign purchaser buys an apartment in Istanbul under documentation representing 150 square meters on a specified measurement basis. Independent professional measurement after delivery establishes only 125 square meters on the same basis.

If the consumer-law framework applies, the discrepancy may support a defective-property claim and potential use of the statutory remedies, including proportionate price reduction or, depending on seriousness and circumstances, withdrawal.

Practical Example: Gross Area Confusion

A buyer in Ankara believes they are purchasing a 140-square-meter apartment but later discovers that the developer’s figure includes elements the buyer assumed were excluded.

The contract, brochure and sales communications should be examined to determine what measurement was actually represented. The buyer should not calculate a claim until the competing measurements are placed on the same technical basis.

Practical Example: Off-Plan Apartment

A foreign investor in Izmir buys an apartment before construction based on a floor plan showing a particular size. After completion, the apartment is materially smaller.

The original floor plan, pre-contract information, purchase agreement, advertisements and independent measurement can become central evidence.

Practical Example: Smaller Apartment Sold for Citizenship Investment

A foreign buyer in Mersin purchases property as part of a larger investment strategy and later discovers a significant area discrepancy that reduces its actual market value.

The buyer should examine the defective-property remedies separately from any immigration or citizenship consequences. A property dispute and a citizenship application involve different legal questions.

Practical Example: Developer Disputes the Measurement

A buyer in Bursa obtains an architect’s report showing that the apartment is materially smaller than promised. The developer responds with a different gross-area calculation.

The dispute should be converted from competing assertions into a technical comparison: what did the contract promise, how was that figure defined, and what is the actual area calculated using the same methodology?

Frequently Asked Questions

1. Can a foreign buyer sue if an apartment is smaller than advertised?

Potentially, yes. A material difference between promised and delivered characteristics can constitute defective or non-conforming property.

2. Can I demand money back for missing square meters?

Potentially. Consumer law expressly recognizes the right to retain defective property and demand a proportionate reduction in the purchase price.

3. Can I cancel the purchase entirely?

Potentially, particularly where the discrepancy is sufficiently serious and the legal requirements for withdrawal are satisfied.

4. Does the developer’s advertisement matter?

Yes. Characteristics contained in advertisements and announcements can be relevant when determining whether property conforms to what was promised.

5. What if the developer uses gross square meters but I measured net area?

The two figures should not be directly compared. The contractual measurement definition must first be identified, and the apartment should then be professionally measured using the corresponding methodology.

6. Should I obtain an architect’s measurement?

For a substantial discrepancy, independent professional measurement can be one of the most important pieces of evidence.

7. How long do I have to bring a claim?

For qualifying consumer purchases of residential or holiday property, the general period for defective-property liability is five years from delivery, subject to exceptions and potentially applicable alternative rules.

8. What if the developer deliberately concealed the true size?

Official consumer guidance states that ordinary limitation provisions do not apply where the defect was concealed through gross fault or fraud.

9. Can I claim compensation as well as a price reduction?

Potentially. Consumer Protection Law No. 6502 preserves compensation claims alongside the statutory alternative remedies where the legal requirements are satisfied.

10. Can I pursue the developer while living outside Turkey?

Generally, a foreign buyer can arrange representation through an appropriately prepared power of attorney, subject to the formal requirements applicable to documents executed abroad.

Legal Assistance for Foreign Buyers Who Receive a Smaller Apartment in Turkey

A foreign purchaser should not treat a significant square-meter discrepancy as merely a construction inconvenience. The size of an apartment is often a fundamental element of its price, usability and market value.

Where a professional seller or developer promised a particular area but delivered materially less, the transaction may fall within the defective-property provisions of Consumer Protection Law No. 6502. Current Ministry of Trade guidance confirms that non-conformity can arise where the delivered property does not possess the characteristics agreed by the parties or represented through advertising and announcements.

Depending on the circumstances, the purchaser may retain the apartment and request a proportionate reduction in price or pursue another applicable statutory remedy, including withdrawal from the contract where its requirements are satisfied. Compensation for additional provable losses may also be available.

The most important practical issue is evidence. The buyer should preserve the original contract, floor plans, brochures, advertisements, developer correspondence and payment records and obtain an independent technical measurement based on the same area concept used when the property was sold.

The consumer-protection framework remains actively enforced in 2026. Ministry of Trade data published in July 2026 shows that defective goods and defective services together represented a substantial majority of applications to Consumer Arbitration Committees during the first half of 2026. This does not determine the outcome of an individual property case, but it illustrates the continuing practical importance of non-conformity disputes.

Firat Fesih Kaya Law Office provides legal assistance to foreign property buyers and investors facing apartment-size, construction and developer disputes in Ankara, Istanbul, Izmir, Mersin, Bursa and throughout Turkey.

Legal assistance may include review of purchase agreements and floor plans, comparison of advertised and delivered measurements, coordination of technical expert evidence, preservation of evidence, formal claims against developers and sellers, price-reduction claims, withdrawal and refund claims, compensation claims and litigation concerning materially smaller or otherwise non-conforming properties.

Phone: +90 312 434 22 22
Mobile / WhatsApp: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Office: Mevlana Boulevard No:221, Yildirim Tower, Balgat, Cankaya, Ankara, Turkey

The key 2026 principle is clear: if an apartment in Turkey is materially smaller than what a foreign buyer was contractually or commercially promised, the buyer may have substantial legal remedies. The dispute should begin with an accurate comparison of the promised and actual area using the same measurement methodology, followed by an assessment of price reduction, withdrawal, compensation and other available remedies.