What it is

Once ratified, an implementation act (πράξη εφαρμογής) becomes final. The law nevertheless allows it to be revoked, by way of exception, for the part that is wrong. A corrective implementation act (διορθωτική πράξη εφαρμογής) is then drawn up. The rule comes from Article 12 of Law 1337/1983 and is now in the Spatial and Urban Planning Code (Law 5306/2026, Article 144(7)(e)). It concerns implementation acts only; the act itself is explained in the guide Implementation act.

When it is allowed

On grounds of legality, where the act breaches the law
For error of fact, where the act was based on a wrong picture of reality, proved by evidence that was not known at the time of ratification or by a final court decision

Revocation takes place of the authority's own motion or on the application of the interested party, only for the part where the error lies, and within a reasonable time from ratification. The corrective act takes account of the state of the properties as it was when the original act was drawn up.

Correction or compensation

The land itself is not always corrected. If a correction in kind is not possible, for reasons of good faith and legal certainty, the authority may, by a reasoned decision, convert the differences into monetary compensation. The corrective act then sets who pays and who is compensated, and the amount is calculated under the Code of Compulsory Expropriations.

Common causes

The area credited in the act is smaller than the owner is entitled to
A property or part of it was recorded under someone else
A title deed, an administrative act or a court decision was not taken into account
The boundaries in the act do not match the actual boundaries on the ground
The owner details are missing or wrong, for example a property recorded as "unknown owner"

The procedure

The application is filed by anyone with a legal interest, with the competent service, usually on the municipality's form. The supporting documents are set by the service in its own list, so we always ask for the official list and follow what the competent head of service says. Where the correction affects co-owners or neighbours, the service may ask for their declarations. Once ratified, the corrective act is registered in the Hellenic Cadastre.

What the surveying engineer prepares

Area analysis: what each owner is entitled to under the title deeds, what was credited in the act and the difference
Survey plan: in GGRS87 (ΕΓΣΑ87), the national coordinate system of Greece, with the claimed polygon, its corners and coordinates, the boundaries set by relevant decisions, the KAEK parcels from the Cadastre's digital files and the building lines
Technical report: explaining the error step by step, with the original documents and explanatory figures
Proposal tables: in the same format as the table of the act, for all co-owners, with the ratified values from the table in force and any earlier corrective acts

The cash contribution is recalculated by the service. Legal matters such as title, heirs and ownership are handled by your lawyer.

What you need / steps

The implementation act: ratification decision, pages of the table, diagram and sketches of the city blocks
Any earlier corrective acts and decisions concerning the property
Your title deeds and the KAEK (the 12-digit cadastral code)
An area analysis and a survey in the field
Preparation of the survey plan, report and tables, and a file ready for submission

What we do

We prepare the complete file for the corrective act (survey plan, area analysis, tables and report) and submit it to the Building Service (town-planning office) of the municipality where the property lies.

If you believe the implementation act is unfair to your property, send us the act and your title deeds and we will tell you whether the difference can be documented. See our topographic survey work.

Corrective implementation act: when a ratified act can be corrected