What is Greece's Electronic Building ID (Ηλεκτρονική Ταυτότητα Κτιρίου) and when do you need one?

The short answer

The Ηλεκτρονική Ταυτότητα Κτιρίου (ΗΤΚ, "Electronic Building ID") is an electronic file that records a building's legal and physical condition: its building permit, the architectural and structural plans that came with it, its energy certificate, any illegal-construction declarations, and its structural data. You don't compile it yourself — a licensed engineer does, under Law 4495/2017 (Articles 52–63). Public and special-use buildings must have one finished by a fixed date, currently 1 February 2028. For an ordinary home or apartment there's no calendar deadline at all: the ΗΤΚ becomes mandatory the moment you transfer the property, and the declaration is attached to the transfer deed.

What the file actually contains

Article 54 of the law lists what the engineer has to compile and upload:

• The building permit stub (στέλεχος οικοδομικής άδειας)
• Every plan that came with the permit — architectural, structural, mechanical/electrical, and

accessibility

• The ΠΕΑ (energy performance certificate)
• The construction inspection certificate (Πιστοποιητικό Ελέγχου Κατασκευής), where one was

issued

• Any illegal-construction declarations tied to the building
• A structural vulnerability sheet or static-adequacy study
• For a whole building: the ownership-shares table (πίνακας χιλιοστών) and cost-allocation

study

A single divided unit — a condo apartment, say — files a shorter version covering the same categories for that unit alone.

Who needs one, and by when

The law splits buildings into two categories.

Category 1 — public and special-use buildings

• Public-sector, municipal, and public-law-entity buildings
• Public-assembly buildings (theatres, cinemas, libraries, museums)
• Fuel stations and car repair shops
• Tourist accommodation over 300 m²
• Education buildings, public or private
• Health and welfare buildings (hospitals, medical centres)
• Correctional facilities

These originally had a five-year deadline from 1 January 2021. It has since been extended twice and now stands at 1 February 2028, under Article 43 of Law 5270/2026 (ΦΕΚ Α' 9/23.1.2026).

Category 2 — everything else

This is essentially every ordinary residential building and apartment. There's no fixed date to watch. Instead, the ΗΤΚ becomes mandatory at the moment of transfer — sale, inheritance, or any other transaction that moves ownership or creates a real right over the property — and the declaration is attached directly to the transfer deed.

How it's different from the ΠΕΑ

It's easy to confuse the two, but the ΠΕΑ is a small part of the ΗΤΚ, not a substitute for it. The energy performance certificate covers one thing — the property's energy class. The ΗΤΚ is a much wider legal dossier: permit status, every accompanying plan, structural condition, illegal-construction status, and ownership shares, with the ΠΕΑ attached as just one of its required documents. You can't complete an ΗΤΚ without a valid ΠΕΑ, but having a ΠΕΑ on file does nothing toward completing the rest of the ΗΤΚ file.

Who does the work

You don't fill this in yourself. An "authorized engineer" — one you appoint — inspects the building, compiles the file, and submits it through the ΤΕΕ's electronic platform (e-building.gov.gr). Once it's accepted, the submission gets a unique certificate: the Πιστοποιητικό Πληρότητας Ταυτότητας Κτιρίου (ΠΠΤΚ, "completeness certificate"). For an ordinary property transfer, this certificate now takes the place of the separate engineer's declaration that Article 83 of the same law used to require on its own. Engineer fees for this work aren't set by law — they're negotiated privately, so treat any number you see quoted elsewhere as unconfirmed.

What happens if you skip it

For Category 1 buildings that miss the deadline, and for Category 2 properties where a transfer happens without a completed ΗΤΚ, the law routes the building through the same enforcement track as an unpermitted structure: the local urban-planning authority (Υ.ΔΟΜ.) is notified and the property gets logged as an αυθαίρετο. In practice that can block a legal sale, a renovation or maintenance permit, a legal lease, or a subsidy application like Εξοικονομώ, until it's resolved. Separately, an engineer who submits falsified ΗΤΚ data faces fines and referral to the Technical Chamber's disciplinary council — that penalty targets false data, not simply a missing filing.

Some sources quote a fine of "€200 up to 10% of the property's objective value" for a missing ΗΤΚ. That figure doesn't appear in the law text or in any official ministry or ΤΕΕ source checked for this guide — treat it as unconfirmed until you see it on an official page.

Turning this into something you track

If you own a Category 1 building, the 1 February 2028 deadline is exactly the kind of date that's easy to lose track of, because it's years out and nobody reminds you as it approaches. If you're planning to sell or transfer an ordinary property, the ΗΤΚ becomes urgent fast, the moment a buyer is at the table. In Epimeleia, add the property, note which category it falls into, and set a reminder ahead of whichever trigger applies to you — the 2028 date, or the day you start a sale.

Before you rely on this

This guide reflects Law 4495/2017 (Articles 52–63) as amended by Article 43 of Law 5270/2026 (ΦΕΚ Α' 9/23.1.2026), and the Ministry of Environment and Energy's 2019 explanatory circular on the related Article 83 declaration. It doesn't cover every building-type exemption or the technical filing process itself, which requires a licensed engineer. Confirm your building's category and current status with a licensed engineer or the ΤΕΕ before relying on a date.