Real estate in Greece under unified control: what the state will see in the new system

Greece is preparing Single real estate hubwhere data from AADE, cadastre, municipalities, urban planning services and ΔΕΔΔΗΕ should flow.

For the owner, this means fewer certificates, but at the same time there are much fewer opportunities to different state bases “did not notice” each other’s discrepancies.

Not just another registry, but a bundle of all registries

The government describes a new Ενιαίος Κόμβος Ακινήτων as a unified digital environment in which basic information about the property will be collected, regardless of which agency stores it today.

Now information is scattered between AADE, Cadastre, municipalities, urban planning services, ΔΕΔΔΗΕ, environmental and other government systems.

Officially, the goal is quite clear: a person will no longer have to collect the same papers from several institutions when selling, transferring or other real estate transactions. The government also explicitly states that the state will gain a clearer and more reliable understanding of private and public property.

What exactly will be brought together?

According to ERT, a new node must obtain information from several primary sources.

• MIDA/AADE — tax data, use of real estate, rent and related income;
• Greek cadastre — KAEC, legal rights, boundaries and geometric characteristics;
• urban planning services — building permits, building rules and “Building Identity”;
• Ministry of Environment — forest maps and energy certificates;
• ΔΕΔΔΗΕ and municipalities — power supply and declared area for the calculation of municipal fees.

It is at this point that a convenient digital service also turns into a very effective verification mechanism.

For example: how many square meters does your apartment have?

Today, the same object sometimes looks different in different databases.

E9 may indicate one area, the municipality another, ΔΕΔΔΗΕ – third, there may be one more number in the Cadastre or construction documents.

As long as these systems exist separately, the discrepancy may remain invisible for years.

When they are connected automatically, the question will arise by itself:

if this is the same apartment, why does it have four different areas?

It was the inability to properly synchronize such data that became one of the reasons for the delay of the project. ERT reports that initially the individual phases of the system were going to be activated back in mid-2026, but the technical integration of AADE, Cadastre, ΔΕΔΔΗΕ and other systems turned out to be more difficult than expected.

Renting will also be more difficult to “lose” between bases

MIDA is already being created as a base linking the tax picture of real estate with E9, Cadastre, ATAK, KAEK, use of the property and lease agreements.

The single node goes further and must add technical and municipal information.

Thus, the state system will be able to see that the object exists, who owns it, how it is used, whether the lease is registered, whether it is electrified, and what information about it is available in other state registers.

This is particularly important as Greece moves towards increasingly automated tax data matching.

Selling an apartment will also become more transparent

There is also an obvious advantage for the conscientious owner.

Today, selling real estate can turn into a search for documents between the engineer, notary, Cadastre, AADE, municipality and other services.

Ideally, the new node should allow much of the information to be retrieved directly from government systems.

That is, an owner with a fully registered property can really win: fewer certificates, fewer manual checks and faster transactions.

But the owner of a property with an illegal extension, incorrect square meters, incorrect E9 or mismatched cadastral information will find himself in a completely different situation.

The state is already talking about real-time checks

Even when preparing linked real estate registers, ERT described the future system as a tool uniform checks and cross-comparison of data in real timeallowing government agencies to see the actual condition of the object.

Therefore, it would be too naive to perceive ΕΚΑ solely as a new convenient electronic office. It is also an infrastructure for digital real estate control.

There is also the issue of personal data

The scale of the combined information turned out to be so large that the project was considered separately Greek Personal Data Protection Authority.

In conclusion No. 10 from August 24, 2026 The department acknowledged that the revised bill generally follows the basic principles of the GDPR, but pointed out remaining questions on minimization of collected data, ambiguity of certain categories of information and storage periods.

That is, questions about exactly how much information the state needs to store in a single system and for how long arose even before its full launch.

What should the owner check now?

You don’t have to wait until EK starts to see the problem for the first time.

It makes sense to check:

• does it correspond E9 real object;
• is the area indicated correctly?
• do they match ATAK and KAEK with cadastral data;
• whether the current lease agreement is correctly registered;
• whether the area declared to the municipality and ΔΕΔΔΗΕ coincides;
• whether extensions and changes to the building have been formalized;
• whether the documents correspond to the actual use of the property.

This is especially important before a sale, gift, inheritance or other transaction in which the discrepancy will still have to be eliminated.

When will it all work?

It is too early to talk about a fully operational Single Node.

The project was originally included in the RRF under the name “Unified Real Estate Register”, but the original schedule fell through. Now we are talking about a project costing about €3.7 millionand technological implementation continues.

The main practical conclusion is simple: If there are old discrepancies in real estate documents, it is better to discover and correct them yourself before the unified state system discovers them.

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