No Documentation for Your House? What to Do According to the New Building Law

In the Czech Republic, there are tens of thousands of buildings for which complete or current documentation no longer exists today. Sometimes it was lost, other times it never properly existed. For older houses, it's common for the original project to be paper-based, incomplete, or to have completely deviated from reality over the years.

As long as "nothing happens," most owners don't deal with it. The problem arises when you want to renovate your house, are selling or buying property, dealing with building legalization, or proceedings begin with the building authority.

It's precisely in these situations that the importance of documentation of the actual execution of the building becomes fully apparent, which the new building law today places as the responsibility of the owner.

What exactly does "not having documentation" mean

It's not just about a situation where no drawings exist. Missing or inadequate documentation is also considered to be a situation where only the original project exists, but the building is different, extensions, layout changes, or technology changes are not documented, documentation doesn't match actual use, or materials for part of the building (e.g., basements, attics, built-ins) are missing.

From the authority's perspective, it's not important when the change occurred, but whether the current state is properly documented.

Owner's obligation under the new building law

The new Building Act No. 283/2021 Coll. is based on a simple principle: The property owner is responsible for ensuring that documentation exists that corresponds to the actual execution of the building.

This applies to houses, apartment buildings, and commercial and industrial buildings. The law does not distinguish whether the building was built legally, renovated 30 years ago, or inherited. Responsibility is always with the current owner.

When missing documentation is discovered

From practice, it's important to state one thing openly: the building authority doesn't usually control houses "just like that." Missing documentation is addressed only when you submit an application (renovation, change of use, legalization), proceedings are underway based on a complaint, a discrepancy arises between records and reality, or a basis is needed for another project.

At that point, the authority asks: "What is the actual state of the building and where is the documentation for it?"

Are automatic penalties imposed for missing documentation?

No. And this is important to emphasize. The typical procedure of the building authority is: identifying the deficiency, requesting completion of documentation, and setting a deadline.

Penalties come only if the owner ignores the request, refuses to provide documentation, or fails to communicate for a long time. In practice, therefore, it's not a punitive approach, but an attempt to bring the situation into compliance with the law.

What options are available when documentation is missing

It depends on the scope of the problem.

Documentation exists but doesn't match: A typical case is an original single-family home project with later extensions and layout changes. The solution is usually a building passport that describes the current state.

Documentation exists only partially: For example, part of the building is missing or technical changes are not documented. The solution is to add documentation or create a new passport.

Documentation doesn't exist at all: Common in older houses. The solution is to survey the building and prepare a passport, possibly followed by a new project.

Building passport as a key solution

A building passport is in practice the most common and fastest way to solve the situation. Its advantages: it describes the actual state, is acceptable to authorities, serves as a basis for further steps, and addresses "how it is" rather than "how it should be."

For many buildings, a passport is sufficient on its own. For more complex buildings, it's the first step toward a further solution.

Typical mistakes that make the situation worse

From practice, the same problems keep repeating: trying to "quickly draw something" without measurement, submitting outdated project, downplaying the problem, and waiting for the authority to contact again.

These steps often lead to extended proceedings, unnecessary costs, and loss of authority trust.

How to proceed correctly – step by step

Find out what really exists: Not just papers, but the actual state. Compare documentation with reality: Differences are key. Choose an appropriate solution: Passport, supplementation, or new project. Have documentation professionally prepared: So it stands the test of time. Only then address other steps: Renovation, permits, legalization.

Why it's not worth putting it off

Missing documentation complicates any further plans, reduces property value, slows down proceedings, and increases the risk of future problems.

Conversely, well-prepared documentation provides a clear legal and technical framework, saves time and money, and makes communication with authorities easier.

Summary

Not having documentation for your house is not exceptional. But not dealing with it when the problem arises is an unnecessary risk.

The new building law places responsibility on the owner, provides an opportunity for correction, and considers a passport as a legitimate solution.

If you know that documentation doesn't match reality, it's always better to address it before you have to. If you're dealing with a similar situation and want to proceed systematically and without improvisation, it makes sense to have professionals on hand who work with existing building documentation every day.