Property Due Diligence in Greece 2026: Documents, Cadastre, Debts and How to Avoid Getting Caught Out

Why property due diligence in Greece is needed at all

Let's start with a conversation. The Greek property market is liquid and attractive, but legally it is more complex than it appears from the outside. For decades two systems of title registration have coexisted here - the old mortgage registry (Ypothikofilakeio) and the modern cadastre (Ktimatologio) - and the transition to a single digital register is still not complete. This means that part of a property's history may be stored in different places, and not every encumbrance makes it into the digital record. A buyer who trusts the seller's word and a slick developer presentation risks buying something other than what they thought.

Legal due diligence on property in Greece is not a bureaucratic formality but a way to protect your money. Its purpose is to confirm, before the contract is signed and funds are transferred, that the seller is genuinely the owner, that the property carries no third-party mortgage, seizure, tax arrears or court disputes, that all buildings are lawful and registered, and that the area and boundaries match the documents. Miss a single item and you inherit someone else's problems along with the keys.

The cost of a mistake is especially high if the property is being bought for Greece Golden Visa (residence permit by investment): a property that fails to meet the area, zone or amount requirements will not get you a residence permit, and the money will already be invested. That is why due diligence is structured to cover two layers at once - the cleanliness of the transaction itself and compliance with migration requirements.

Who checks what: the lawyer, notary and engineer - three distinct roles

The main rule that saves people years and tens of thousands of euros: due diligence is carried out by a team of three independent specialists, each with their own area of responsibility. You cannot substitute one for another, and hiring them through the developer is a bad idea, because then they are protecting someone other than you.

• An independent lawyer (dikigoros in Greek). This is your person, hired by you and working in your interests. They check the chain of title, search for encumbrances, mortgages, seizures and court disputes in the cadastre and the mortgage registry, review contracts, and handle the legal side of the transaction. This is the central figure of the due diligence.
• A licensed engineer (michanikos). Carries out the technical check: compares the actual building against the building permit, looks for illegal extensions and conversions (unauthorised construction), and checks the topographic plan and boundaries. Without their certificate of building legality, a notary is legally barred from executing the contract.
• Notary (symvolaiografos). A neutral public official. They certify the transaction, verify compliance with tax and property law, and execute the contract. It is important to understand: the notary is neutral and does not personally protect you from a bad deal - they oversee the legality of the form, not your interests.

Hence the takeaway: a notary is enough for the paperwork but not for protection. This is exactly why an independent lawyer and your own engineer are not a luxury but the bare minimum. All property due diligence in Greece rests on them.

The Ktimatologio land cadastre and the mortgage registry: checking title

The heart of legal due diligence is confirming that the seller is genuinely the owner and that the property is free of encumbrances. This is done through two sources: the Ktimatologio (Hellenic Cadastre, the unified property cadastre) and the Ypothikofilakeio (the mortgage registry, the older registration system). In March 2026 the cadastre moved to an updated digital portal - the largest upgrade to land registration infrastructure in a decade.

What the lawyer checks in the registries:

• Title and the chain of ownership. Who owns it now and how title passed previously (inheritance, gift, purchase). Gaps in this chain are a warning sign.
• Encumbrances and liens. Mortgages, mortgage prenotations (prenotation, a bank's security annotation), seizures, easements, and third-party rights.
• Boundary alignment. That the physical boundaries and area of the property match the registered topography.

A key nuance in 2026: the digital portal is only the first step. Greece's registration system is mixed, and in areas where the cadastre is not yet fully rolled out (not all regions have migrated), some older mortgages and annotations may not appear in the digital record. That is why, in most cases, a physical visit by the lawyer to the competent cadastre office and the mortgage registry is required, along with ordering certified extracts and a professional review of the property's history - not a single online search. If the property is located in an area where the cadastre has not been activated, the primary source remains a search at the Ypothikofilakeio. Official land registration services are available on the portal Greek government services gov.gr.

Encumbrances, mortgage and prenotation: someone else's debts on the property

The costliest risk of buying property in Greece is acquiring it together with someone else's debts. Under Greek law, encumbrances follow the property, not the person. If the apartment carries an unpaid mortgage from the previous owner or a seizure, these problems will pass to you.

What exactly the lawyer looks for in the certificate of encumbrances:

• Mortgage. An existing lien held by a bank or creditor. Before the transaction it must be discharged or settled out of the purchase amount through a special procedure.
• Mortgage prenotation. A security annotation that a bank registers in favour of a future claim. Formally it is not a full mortgage, but it is a real encumbrance that must be cleared.
• Seizures and enforcement (seizures). Imposed by creditors or the tax authority for the owner's debts.
• Court disputes and third-party claims. Title claims, disputes among heirs, challenges to transactions.
• Inheritance contracts. From 2026, the reform of inheritance law introduced mandatory inheritance contracts (klironomiki symvasi): during their lifetime an owner agrees with the heirs on the fate of the property, and once certified by a notary and registered, such a contract creates an encumbrance. Searching for registered inheritance contracts is now part of standard due diligence.

The conclusion is simple: not a single euro of deposit should go to the seller until the lawyer has obtained a fresh certificate of encumbrances and confirmed that the property is clean or that all liens will be discharged at the moment of the transaction under a transparent scheme.

Building permit and building legality: checking for unauthorised construction

This is the second most common and most dangerous risk - illegal buildings and conversions. In Greece unauthorised construction (building or altering without a permit and without subsequent legalisation) is very common, and the law treats it strictly. An important detail: even a glazed-in balcony turned into a room, or a basement converted into a bedroom, may be deemed illegal if they have not been documented and legalised.

The technical check is carried out by a licensed engineer. They:

• Compares the building against the building permit. The actual walls, floors, areas and intended use of the premises must match what is stated in the permit.
• Looks for illegal extensions and alterations. Any deviations from the approved plans are potential unauthorised construction that will have to be either legalised or demolished.
• Checks the topographic plan (topografiko). A document recording the exact boundaries and position of the plot. Without it you cannot be sure you are buying precisely the parcel of land you were shown.
• Issues a certificate of legality. This is a key document. Without the engineer's certificate confirming the absence of planning violations, a notary is legally barred from drawing up the contract.

In other words, the legality of the buildings is not a preference but a legal barrier: the transaction simply cannot be completed until the engineer confirms the property is clean. That is why your own technical specialist is just as important as the lawyer. For more on selecting and formalising a property, see our guide how to buy property in Greece.

Greek property due diligence checklist: a "check - what it reveals - where to look" table

Let's bring all the key checks together into one practical checklist. This is the framework your team of specialists works from. Print it out and refer to it at every stage - not a single item should be left unanswered before the money leaves your account.

If even one row of the table is left without a clear "checked and clean," it is too early to launch the transaction. That is the line separating a calm purchase from a "how I got caught out" story.

AFM, bank account and the legality of the buyer's funds

Due diligence concerns not only the seller and the property but also you as the buyer. Without properly arranged status the transaction simply cannot be completed, and for a foreigner from a CIS country there is an additional layer of compliance.

• AFM (Greek tax number). A foreigner must obtain an AFM before the transaction. It is arranged through an accountant or lawyer at the local tax office (DOY). Without an AFM it is impossible either to buy property or to pay ENFIA afterwards.
• Bank account and transfer of funds. The purchase funds must arrive transparently, through lawful channels, with proof of origin. A Greek or European bank will request the source of funds.
• Source of funds. This is checked especially strictly for buyers from countries subject to enhanced compliance. You need to prepare documents explaining where the money came from: sale of assets, business income, savings, inheritance. Everything strictly lawful, with no circumvention of sanctions.

For Russians and CIS nationals this is often a bottleneck: banks scrutinise the source of funds closely, and it is best to start preparing the documents in advance, in parallel with the due diligence on the property. A well-assembled source-of-funds file speeds up both the transaction itself and the subsequent residence permit approval.

Deposit and payment: escrow, the notary, and why you must not pay "by hand"

Money is the most vulnerable point in a property transaction. A typical scam: the buyer is rushed into putting down a large deposit "to secure the property," and it later turns out that the property carries a mortgage or the seller has no right to dispose of it at all. That is why the flow of money is structured through secure channels.

• A deposit only after the initial due diligence. The preliminary contract and deposit are arranged once the lawyer has already obtained an extract confirming the absence of obvious encumbrances. The amount and terms are recorded in writing, with clear grounds for refund.
• Settlements through a notary or escrow. Escrow is when the money is held by an independent party and released to the seller only once conditions are met (clean title, discharge of the lien). In Greek practice, settlements often go through the notarial procedure and bank cheques.
• No cash "by hand." Payments outside official channels strip you of protection and create tax risks. The amount in the contract must match the amount actually paid.

There is one principle: money moves towards document cleanliness, not the other way around. If the seller or an intermediary pushes for prepayment before due diligence is complete, that in itself is a reason to be wary.

If the purchase is for a Golden Visa: additional compliance checks

When the property is bought for a residence permit by investment, a separate layer is added to the standard due diligence - the property's compliance with the program's rules. A mistake here means the money is invested but the residence permit is refused.

What is additionally checked under the 2024-2026 rules (Law 5100/2024):

• Minimum amount threshold by zone. 800,000 euros in premium zones (Attica/Athens, Thessaloniki, Mykonos, Santorini, and islands with a population over 3,100), 400,000 euros in most other regions, and 250,000 euros - only for converting a commercial property to residential or for restoring a listed building.
• Minimum area of 120 sq m. For the 400,000 and 800,000 euro thresholds, the property must be a single unit with a net internal area of at least 120 sq m. The area is recorded in the purchase and sale contract.
• A single property, no splitting. Since 2024 you cannot combine several small properties to make up the amount. The investment must be in a single property, in a single transaction.
• Ban on short-term rental. A property used to obtain a Golden Visa may not be rented out on a short-term basis (Airbnb) - doing so risks revocation of the residence permit and a fine.

That is why the lawyer checks not only the cleanliness of title but also whether the property is in principle eligible for the program: zone, area, type. We break down the thresholds and zones in detail in our guide Greece Golden Visa, and selecting seaside properties in our article on seaside property in Greece.

Red flags: when it is better to walk away from the deal

Experience shows that most problematic transactions send signals in advance. If you see these signs, it is a reason to pause and double-check everything twice over - and sometimes to walk away from the deal.

• Pressure over deadlines and prepayment. "Buy now, the property is going, put down a deposit today" - a classic tactic to stop you having time to check.
• Discrepancies in the documents. The area in the E9 does not match reality, the boundaries on the topographic plan do not align with the fence, the building permit does not reflect the actual building.
• Refusal to provide the lawyer with extracts. If the seller drags their feet on the cadastre documents, the ENFIA certificate or the engineer's certificate, that is a red flag.
• A request to understate the amount in the contract. Unlawful; it strips you of protection and creates tax risks.
• Unauthorised construction without legalisation. Extensions and alterations the seller offers to "formalise later."
• A property in an area with an incomplete cadastre. Not a deal-breaker, but it calls for an in-depth search in the mortgage registry, because some encumbrances may not appear digitally.

The main principle: any point the seller asks you to "take on faith" must be verified with documents. Haste in real estate almost always works against the buyer.

Due diligence and transaction stages: a step-by-step order of actions

To put it all into a clear sequence, here is what a well-organised process looks like, from your first interest in a property to obtaining clean title.

• Step 1. Team and AFM. You hire an independent lawyer and engineer, obtain a Greek AFM tax number, open an account, and prepare source-of-funds documents.
• Step 2. Legal due diligence. The lawyer orders extracts from the Ktimatologio cadastre and the mortgage registry and checks title, encumbrances, mortgages, prenotations, seizures, inheritance contracts and court disputes.
• Step 3. Technical check. The engineer compares the building against the building permit, checks the topographic plan, looks for unauthorised construction, and issues a certificate of legality.
• Step 4. Financial debts. The 5-year ENFIA certificate, the E9 record, utility debts and condominium contributions are checked.
• Step 5. Preliminary contract and deposit. Only after clean extracts - through secure settlements (escrow/notary).
• Step 6. Notarial contract. The notary executes the transaction once the engineer's certificate and the ENFIA certificate are in place, and the final settlement is made.
• Step 7. Registration of title. The new title is registered in the cadastre - only after this are you a full owner.

The order is no accident: money moves only after confirmed document cleanliness at each step. Breaking this logic is precisely the loophole through which buyers get caught out.

Tax and utility debts: ENFIA, E9, electricity and condominium

The third major layer of due diligence is the financial "tails" that can trail behind a property. The lawyer and accountant work here, and without cleanliness on this block the transaction likewise will not go through.

• ENFIA certificate. ENFIA is the annual unified property tax. To transfer title, the owner must present the notary with an ENFIA certificate confirming payment of the tax for the last 5 years and settlement of arrears on other properties. Without this certificate the transaction cannot be completed.
• E9 declaration. This is the property declaration on which ENFIA is calculated. The lawyer cross-checks the seller's E9 data against reality: whether the areas, shares and characteristics of the property match. Discrepancies are a reason to dig deeper.
• Utility debts. Debts for electricity, water, and condominium contributions (the building's common expenses) are checked against the bills and through the building manager. Some of these debts are attached to the property.

A separate note on the 2026 reform: checking the E9, ENFIA and cadastre records has become as important as examining the title deed itself - precisely because a unified digital register went live, in which the data must reconcile. If the seller's records do not match one another, that is a signal for caution. A full breakdown of the tax side of ownership is in our article on property taxes in Greece.

An expert's view: typical buyer mistakes and how to avoid them

Over years of practice we see that people are undone not by rare legal quirks but by the same recurring mistakes. Let's go through them so you don't repeat them.

• Trusting the seller's specialists. A lawyer and engineer supplied by the developer protect the developer. You must hire your own team yourself.
• Cutting corners on the engineer. Clean legal title does not cancel out unauthorised construction. Without a technical check you can buy a property that can neither be legalised cheaply nor formally registered.
• Rushing the deposit. Paying money before obtaining the certificate of encumbrances is the most common way to lose funds.
• Ignoring tax tails. Without a 5-year ENFIA certificate the transaction will not go through, while utility and condominium debts surface only after the purchase.
• Buying for a Golden Visa without checking compliance. The property is legally clean but fails on area or zone - and the residence permit is refused.

Property due diligence in Greece forgives slowness, but it does not forgive gullibility and haste. The sooner the team and the order of actions are in place, the calmer the transaction - and the smaller the chance of running into someone else's debts or unauthorised construction.

Summary: how to avoid getting caught out when buying property in Greece

Let's draw a line under it. Greek real estate remains a solid asset and a viable route to a residence permit, but you cannot buy it "on trust." The legal system is mixed, the transition to a single digital register is not complete, and unauthorised construction and tax tails are common. The buyer's protection is the discipline of due diligence, not luck.

The minimum set that will save you from losing money: an independent lawyer and your own engineer, extracts from the Ktimatologio cadastre and the mortgage registry regarding encumbrances, the engineer's certificate of building legality, a 5-year ENFIA certificate, a check of E9 and utility debts, an obtained AFM, settlements through escrow or a notary, and - if the purchase is for a Golden Visa - a compliance check on area, zone and amount. Money moves only after clean documents.

If the process is set up correctly, the purchase proceeds calmly and predictably, and the title turns out to be genuinely clean. To select and vet a property, complete the transaction, and, if needed, move towards a Greece Golden Visa we will help on a turnkey basis. It is always worth checking the current forms and property registration services on the official portal Greek government services gov.gr.