HOME / Services

Building Legalization

Building legalization is the legal process that formalizes a structure built without permits or not fully compliant with regulations, giving it legal validity and the status of a lawful building. In Croatia, legalization is carried out by obtaining a Decision on the As-Built State—an official document confirming that the building is considered legal and authorized for use, even if it was originally constructed without the necessary approvals.

In a broader sense, legalization allows a building constructed without a permit or in violation of regulations to become legally recognized, following specific conditions and prescribed steps.

Why is legalization important?

Legalization is crucial both legally and practically because it:

» Allows the building to be registered in the land registry and cadastre, making it clear and legally recognized property that can be freely managed
» Enables the owner to sell, gift, inherit, or mortgage the property
» Makes it possible to connect the building to public utilities (water, electricity, sewage)
» Allows the property to be used for business purposes, including tourism or other commercial activities
» Makes it easier for the property to participate in incentive programs and projects funded by public or EU funds

Who can legalize a building and when?

According to the latest legal amendments announced in early 2026, legalization is only allowed for buildings constructed on or before June 21, 2011. Applications for such buildings can be submitted without a time limit, but structures built after that date cannot be legalized through this procedure.

What does legalization achieve?

Once the competent authority issues the Decision on the As-Built State:

» The building becomes legally valid and compliant
» It can be registered in the land registry and cadastre
» It can be sold, gifted, or used as collateral for loans
» The owner can safely use the building for residential, business, or commercial purposes