Three risks dominate. First, title: a full search at the Hellenic Cadastre (Ktimatologio) — the national registry, still being digitalised through 2026 — is essential to confirm clean, transferable ownership. Second, and most common, undeclared or illegal construction: unpermitted extensions or buildings that were never regularised can legally block the transfer of ownership until they are declared and rectified, so an engineer's compliance check is critical. Third, the classic red flag: a seller pressing you to sign or pay a deposit before title searches are finished. The right posture is patience and independent verification — which is exactly where a trusted advisor, rather than a selling agent, protects you. Confirm every point with a Greek lawyer and engineer before committing funds.
Title and illegal construction: the two structural risks
The first pillar of Greek due diligence is title. Ownership is confirmed through the Hellenic Cadastre — the Ktimatologio — a unified national land registry that has been progressively digitalised and continues to be modernised through 2026. A proper title search establishes that the seller genuinely owns the property, that it is free of mortgages, liens, pre-emption rights or competing claims, and that it can lawfully transfer. In a market that historically relied on older, fragmented records, this search is not a formality but the foundation of a safe purchase, and it is one of the core reasons an independent lawyer is engaged.
The second and most frequent risk is illegal construction. It is common in Greece to find extensions, additional structures, converted spaces or pools that were built without the correct permits or never declared under successive amnesty/declaration schemes. The consequence is serious: an undeclared or illegal construction can legally block the transfer of ownership until it is regularised, and regularisation can carry cost, delay and, occasionally, the risk that it cannot be resolved at all. This is why a civil engineer's verification of planning compliance — matching the physical building to its permits — sits at the heart of Greek diligence, not at its margins.
The red flag, and why a trusted advisor matters
Beyond the structural checks, there is a behavioural warning sign every buyer should know: pressure to sign or to pay a deposit before the title search and the engineering check are complete. A seller or a selling agent who pushes for a quick commitment 'to secure the property' before diligence has finished is creating exactly the conditions in which title defects and illegal-construction problems slip through. The correct response is to slow down: no deposit and no signature until the lawyer has cleared the title and the engineer has confirmed compliance. Genuine sellers of sound property accommodate proper diligence; those who resist it are telling you something.
This is where the distinction between a selling agent and a trusted advisor becomes concrete. A selling agent is paid to close the transaction; an independent buyer's advisor is paid to protect the buyer — to insist on the searches, to read the engineer's report critically, and to walk away when the answers are wrong. GADAIT's role is the latter: a trusted advisor, not a counterparty. The risks, registry and process here are drawn from the Hellenic Cadastre framework and standard Greek conveyancing practice and are directional; confirm the specific title, compliance and permit position of any property with a Greek lawyer and engineer before you commit funds.
Sources
Primary and expert sources behind this answer:
- Hellenic Cadastre (Ktimatologio) — National land registry, title search and 2026 digitalisation ↗
- Hellenic Notaries — Notarial deed, regulated notary fees and the Greek conveyancing process ↗
This page is general information, not legal or tax advice. Greek property, tax, letting and succession rules are technical and change frequently — several reliefs here (VAT suspension, capital-gains suspension) are time-limited to 31 December 2026. Every figure and rule here must be confirmed with a Greek lawyer (dikigóros), a notary (symvolaiográfos) or a tax adviser (logistís/forotechnikós) for your specific situation before you act.
Related questions
Explore our guides and listings
Buying property in Greece? Get an independent read first.
GADAIT is an independent luxury buyer's agent. We confirm the tax, the title, the real all-in cost and the right structure for your specific case — before you commit a euro.
Newsletter
Be among the privileged.
Subscribe to the Gadait International newsletter and receive the latest trends in the luxury market, along with exclusive opportunities for exceptional properties in advance.
Low frequency. High relevance.