Legalizing Unauthorized Construction in Bulgaria — What You Need to Know

Unauthorized or unpermitted construction is a widespread reality in Bulgaria. Older houses, rural properties, extensions, additional floors, garages, and outbuildings built without the required permits are extremely common — particularly in smaller towns and villages. If you own such a property, or are considering buying one, it is important to understand how the legalization process works and what to realistically expect.

What Is an Unauthorized Construction in Bulgaria?

A building or structure is considered unauthorized (незаконен строеж) under Bulgarian law if it was built without a valid building permit, if it deviates significantly from the approved construction project, or if it was erected in violation of the applicable regulatory plan. This applies to both residential and commercial properties, and to structures of all sizes — from a small outbuilding to an entire floor added without permission.

Can Unauthorized Construction Be Legalized?

In many cases — yes. Bulgarian law (ZUT — the Spatial Planning Act) provides mechanisms for legalizing unauthorized constructions that meet certain criteria. However, whether a specific structure can be legalized depends on a range of factors: when it was built, whether it complies with the current regulatory plan, whether it meets applicable technical norms, and the specific circumstances of the case.

This is why there is no universal step-by-step process that applies to every situation. Each case is assessed individually, and the path to legalization — or the conclusion that legalization is not possible — depends entirely on the specific property, its location, its construction history, and its relationship to the current regulatory framework.

The Role of the Municipality

The municipal administration — specifically the Chief Architect — is the primary authority that can assess whether a given unauthorized construction has a viable path to legalization. The municipality reviews the specific situation, evaluates compliance with the regulatory plan, and provides guidance on the applicable procedure. Without this initial assessment, it is not possible to know what the process will look like for a specific property.

This is one of the most important points for property owners to understand: legalization is not a standardized administrative procedure with a fixed sequence of steps that applies to everyone. It is a case-by-case process that unfolds differently depending on the findings of the municipal assessment, the nature of the unauthorized construction, and a number of other factors that vary from one property to the next.

What If Legalization Is Not Possible?

If the unauthorized construction does not meet the criteria for legalization, the relevant authority may issue a demolition order (заповед за премахване). This is why it is critically important to assess the legalization prospects of a property before purchasing it — particularly when it contains structures that were clearly built without permits. A regulatory due diligence check before any purchase is always advisable.

How We Can Help

Navigating the legalization process from abroad — without speaking Bulgarian, without knowing the local authorities, and without understanding how the system works in practice — is genuinely difficult. We work with property owners remotely to assess their specific situation, communicate with the relevant municipal authorities on their behalf, and provide clear, honest guidance on what is realistic for their property.

If you own or are planning to buy a property in Bulgaria with unauthorized structures, book a Clarity Call. We will tell you honestly what we know, what needs to be assessed locally, and what the realistic options are for your specific case.