Building Legalization in Croatia 2026: Requirements, Costs and Process
If you have an illegally built structure in Croatia, the most important thing to clarify right away is this: not every structure can be legalized.
Legalization is a process by which an illegally built building is brought into the legal system, but only if it meets the conditions prescribed by law. The amendments published in May 2026 have digitized the process and removed some previous costs - but the fundamental requirements remain the same.
Status of the 2026 Legal Changes
The amendments to the Act on Treatment of Illegally Constructed Buildings were published on 8 May 2026 in the Official Gazette (NN 48/2026) and entered into force on 16 May 2026.
The most important changes introduced by the law:
- applications are submitted exclusively digitally, through the eDozvola system - no more visits to the office with stacks of paperwork
- water contribution has been abolished - one cost item fewer for everyone going through the process
- if your previous application was rejected due to incomplete documentation or unpaid fees (and not on the merits), you can submit a new application
- the geodetic survey is prepared in electronic form (GML format), all documentation is signed with an electronic signature
- the decision is delivered to your e-Građani inbox, not by post
Since the law is already in force, there is no reason to wait.
Can you legalize your structure?
A building can be legalized if it was built by June 21, 2011, and if it meets the basic conditions of visibility and construction.
In practice, this means:
- it was built before June 21, 2011
- it is visible on official orthophoto images
- it has basic building elements (walls and roof)
- it is not on maritime domain, public area, or a protected area
If any of these conditions is not met, legalization is not possible.
How much does legalization cost?
The cost depends on the size and complexity of the structure, but in practice falls within the following ranges:
- smaller structures: 800 - 1,500 €
- family homes: 3,000 - 7,000 €
- larger structures: 6,000 € and above
The cost consists of:
- geodetic survey
- project documentation
- municipal contribution
Under the 2026 law, water contribution has been abolished, which compared to the previous process can mean savings of several hundred to several thousand euros, depending on the structure. The largest part of the total cost continues to be statutory contributions, not the documentation itself.
How long does the procedure take?
The duration of the process cannot be determined in advance as it depends on several factors:
- the number of applications received by the competent authority
- the completeness and accuracy of the documentation
- the complexity of the structure itself
The digitization of the process through eDozvola speeds up submission and initial processing, but overall duration still depends on the workload of administrative bodies. Since the law has just come into force and increased interest is expected, those who start earlier have an advantage.
HOW THE PROCESS WORKS?
The process unfolds through several phases:
- verification of legalization eligibility
- preparation of the geodetic survey (electronic, GML format)
- preparation of the as-built survey and structural engineer's statement
- submission of the application via eDozvola
- issuance of the decision and delivery to the e-Građani inbox
- registration in the cadastre and land registry
The most important step is always the initial verification, as only then can the feasibility and cost of the process be realistically assessed.
Need professional help?
Our team of licensed surveyors is available for a free consultation.d.
What if the Structure Has Been Extended?
If a structure was extended or reconstructed after 21. 6. 2011, that work cannot be legalized.
For such works, a building permit is required, as they are considered new construction or reconstruction under current regulations.
Most common situations
- structure built before 2011 → eligible for legalization
- structure partially extended → building permit required for the extension
- structure built after 2011 → not eligible for legalization
- structure built before 1968, extended before 2011 → eligible for legalization
- structure built before 1968, partially extended after 2011 → building permit required
- previously rejected application due to paperwork or non-payment → new application can be submitted
When It Makes Sense to Start the Process?
The biggest mistake in practice is waiting until legalization becomes an urgent obligation.
At that point the process most often comes under time and financial pressure, and the ability to choose a contractor and find an optimal solution is reduced.
If you know a structure is illegal and you plan to use it long-term, it makes sense to start the process before it becomes a condition for:
- selling the property
- a loan or mortgage
- resolving ownership and legal status
With the new law in force and water contribution abolished, the timing is better than it has been in years.
Frequently Asked Questions
Can a structure without a building permit be legalized?
Yes, if it meets the conditions prescribed by law. That is the fundamental purpose of the process.
What if the structure is not visible on aerial photographs?
If the structure is not clearly visible on the 2011 aerial photographs, the process is not automatically impossible - but it becomes more demanding. In that case, a certificate from the cadastral office is required confirming that the building was recorded on the cadastral plan or another official cartographic base by 21 June 2011.
Can an extension be legalized?
No, if it was built after 21. 6. 2011. A building permit is required for such construction.
Can I legalize a structure if only the foundation is visible on aerial photographs?
No. The law explicitly requires that at minimum rough structural construction works have been completed - foundations with walls, or columns with beams and a ceiling or roof structure, for at least one floor. A foundation without walls does not meet this requirement and legalization is not possible.
Can I legalize the main building if I added a canopy without walls after 2011?
The main building can go through legalization if it meets all the conditions - the canopy does not block that. As for the canopy itself, it is generally not considered a building under the Legalization Act since it has no filled walls, so the act does not apply to it. Smaller canopies may not require any permit at all if they fall under the category of simple structures under a separate regulation. Larger ones require a building permit. The specific situation requires checking the dimensions and purpose before starting any procedure.
Is legalization worth it?
In most cases, yes, because an illegal building has limited market and legal value. Selling is legally complicated and market value significantly lower, it cannot be registered in the land registry as a building, and it cannot be used as collateral for a loan
Conclusion
Legalization is possible only if the structure meets the legal requirements and is properly positioned within the documentation system.
The 2026 amendments have digitized the process, abolished the water contribution, and opened a new opportunity for those who were previously rejected on formal grounds.
The most important decisions are made at the beginning:
- can the structure be legalized
- what is the approximate cost
- how feasible is the process in your specific case
If these answers are clear, the process is predictable. If they are not, the first step is always a professional assessment - before any investment of time or money.
