Change of Use of Premises in Czechia: When Permits Are Required

JUDr. Jakub Dohnal, Ph.D., LL.M.
JUDr. Jakub Dohnal, Ph.D., LL.M.
9.3.2026 | ARROWS law firm

Are you planning to convert a leased office into a retail shop, an apartment into a medical practice, or a warehouse space into offices? Without construction works it may seem straightforward, but this is exactly where the legal pitfalls under Czech law often arise. In practice, it depends on many factors, such as the type of building, the location in the Czech Republic, or new safety and hygiene requirements. It may often appear that it is enough to lease the premises and start using them, but the Czech building authority may see it differently. This article will guide you through when a permit is required and what to expect if you do not comply with the rules.

In the image, we see a lawyer addressing the issue of a change in the use of a building.

Quick summary

  • A change of use without construction works requires a permit from the building authority in the Czech Republic in practice almost always if the new purpose differs from the purpose stated in the occupancy permit (kolaudační rozhodnutí), even if you do not alter any load-bearing structures.
  • The process typically takes 30 days, or 60 days in more complex cases; using the premises without a permit may result in a fine of up to CZK 2,000,000 and an operating ban.
  • The basis for a successful procedure is verifying compliance with the zoning plan in advance, securing opinions from the relevant authorities (public health authority, fire brigade) and preparing high-quality documentation.
  • ARROWS advokátní kancelář handles this agenda on a daily basis and can provide representation before the building authority, review of your intended change, and preparation of the required documentation.

When it qualifies as a change of use without construction works

A change of use of a building without construction works means that nothing is physically altered in the building. You do not demolish partitions, add extensions, or install new systems; only the purpose for which you use the building or part of it changes. A classic example is converting a rented apartment into an office in a city centre, where the space can technically be used without any physical intervention, yet it may still constitute an offence under the Czech Building Act if you do not have the relevant permit.

The reason is straightforward. The Building Act (Act No. 283/2021 Coll.) strictly provides that you may use a building only for the purpose resulting from the occupancy permit (kolaudační rozhodnutí) or the building permit. If your apartment was approved for residential use, you cannot convert it into a doctor’s surgery, manufacturing premises, or a commercial establishment without consent, regardless of whether you make any physical changes. The requirements for safety, hygiene, noise, or fire protection may change, and these are factors the building authority in the Czech Republic takes very seriously.

What exactly is meant by “change of use”

In legal terms, a change of use means any situation where the purpose for which a building is ordinarily used changes. This may involve converting an apartment into an office, an office into a shop, or a warehouse into a workshop. Act No. 283/2021 Coll. (the Czech Building Act) also treats as a change of use changes to the operational equipment of a building or changes in the method of production that could endanger the environment, public health, or fire safety.

In practice, we often encounter owners who assume that if they only repaint the walls and put a new sign on the door, it is not legally relevant. The opposite is true. For the purposes of Czech building law, it is not decisive whether you physically altered the building; what matters is solely what you use it for.

The difference between a “paper-only” change and a change with increased requirements

The critical difference lies in whether the new purpose of use places the same or higher requirements on the premises than the original purpose. If you change one office use to another office use with a different administrative activity, it may be largely a formality. However, if you change a warehouse—originally subject to modest requirements—into premises with high footfall, everything changes.

This mainly concerns fire safety, fire compartments, the number of escape routes, lighting, and ventilation. The complexity lies precisely in these differences, which an ordinary property owner may not see. The building authority will see the risks it will focus on, and if you do not inform it in time, you may face sanctions.

When the Building Act requires a permit for a change of use

In general, a change of use requires a permit from the building authority in the Czech Republic where the new purpose differs from the original purpose stated in the occupancy permit (kolaudační rozhodnutí) or in the building permit. There are almost no exceptions. If you are unsure, it is advisable to contact the building authority or a lawyer.

A permit is unconditionally required especially in the following situations:

  • If you change an apartment into an office, shop, or service premises: The building authority will require verification that the new purpose will not endanger the safety of other owners or tenants in the building. Typically, fire safety, noise, or increased footfall are assessed. If the premises are in an apartment building, the position of the owners’ association (SVJ – the Czech unit owners’ association) may also be crucial.
  • If you change an office into an apartment: The building authority will again require verification of hygiene standards such as daylight access, lighting, ventilation, surrounding noise, and minimum clear ceiling height.
  • If you convert warehouse space into any type of commercial premises or shop: Other relevant authorities come into play, such as the Regional Public Health Authority, the Fire Rescue Service, or environmental authorities.
  • If you change an agricultural building into residential use or business premises: Here, issues of zoning and planning, protective zones, or specific infrastructure requirements are often addressed.
Related questions on situations requiring a permit

1. Does the permit obligation apply even if I change an apartment into a studio or social space without sales?
Yes, these changes usually require a permit, as they differ from the original residential purpose and may involve different hygiene or fire-safety requirements.

2. What if the regulations have changed in the meantime and the new purpose already meets the old parameters?
Even in that case, a permit is necessary. The building authority must verify whether the premises meet the currently applicable standards for the new purpose.

3. Do I need a permit even if it is short-term use, for example rentals via platforms such as Airbnb?
If such use conflicts with the occupancy permit (which states “permanent residence”), the building authority may require a change of use to accommodation services, especially if the activity is carried out continuously as a business. Case law and administrative practice are becoming stricter in this respect.

When you can do without a permit – and when you cannot

As indicated above, a change of use of a building is subject to a permit from the building authority in the vast majority of practical situations in the Czech Republic. Exceptions where you can do without a permit are tied to specific conditions under Section 213 et seq. of the new Czech Building Act.

A permit is typically not required only in the following situations:

  • If you are changing the purpose of use within the same category of use, with no impact on the surroundings, fire safety, or hygiene. For example, changing one administrative activity to another administrative activity in premises already approved as offices (from a law office to an accounting office), provided the number of people and the fire load do not change.
  • If the occupancy approval decision (kolaudační rozhodnutí) expressly states that the premises may be used for multiple purposes (mixed-use premises), and your intended use falls within those permitted purposes.

However, these are truly exceptions. In the vast majority of practical cases encountered by the attorneys at ARROWS, a Prague-based law firm, a permit is required. That is why every property owner should proceed cautiously, because the cost of a mistake is far too high.

Related questions on exceptions from the permit requirement

1. Is it really such a rare case that I can do without a permit?
In practice, yes. We do not recommend taking the risk without consulting an expert or the relevant authority.

2. How do I know that the change is "within the same category"?
It is not easy to determine on your own. Details such as fire load or parking requirements are decisive. We recommend consulting an attorney or a designer.

3. If the occupancy approval decision says "non-residential premises", does that mean I can choose any activity?
No. The term "non-residential premises" is too general. The specific use must be stated (e.g., retail unit, warehouse, office). A change between them requires a permit.

Permit for change of use and what you risk

One of the most common areas of confusion concerns terminology. The new Building Act has unified procedures, and what used to be known as a simplified "notification" regime is now part of the permitting process for the project. In practice, you apply for a permit to change the purpose of use of a building under Czech law.

The Building Authority will review your intention, assess compliance with the zoning plan, obtain (or you will provide) binding opinions from the affected authorities (public health, fire brigade), and only then issue a decision.

What happens if you do not do it

If you believe you can simply make the change and start using the premises, you are committing an unlawful act. The Building Act is clear that you may use a building only for the permitted purpose in the Czech Republic.

The fine for an offence consisting in using a building contrary to the occupancy approval decision or permit can reach up to CZK 2,000,000. In addition, the Building Authority may order a prohibition on using the building, meaning you will be forced to immediately suspend your business and vacate the premises. In practice, this is very painful, especially if you have already invested in the premises.

Related questions on the procedure 

1. Can I find a simple form somewhere?
The application is submitted on the prescribed form, ideally electronically via the Builder’s Portal. However, the form itself is not enough; the attachments (documentation, opinions) are crucial.

2. If the authority issues the permit, can I use it immediately?
The permit must become final and binding. Only then is the change legally effective and you may lawfully use the premises for the new purpose.

3. What if I do not trust the Building Authority and want to verify that I have a permit?
The attorneys at ARROWS, a Prague-based law firm, can help you verify the legal status of the property, inspect the file, and confirm that everything is in order.

Procedural steps and how long it will take

The process of changing the use without construction works must be approached systematically. The basic steps are as follows:

1. Preparation of supporting documents and verification of compliance with the zoning plan (1–2 weeks): Before you submit anything to the Building Authority, check the zoning plan of your municipality to see whether the intention is permissible at all.

2. Collection of the required documentation (2–4 weeks): The basis is the application for a permit to change the purpose of use. The attachment must include building documentation showing the current and the new manner of use—most commonly a floor plan with a description and a technical report prepared by an authorised person.

3. Securing opinions from the affected authorities (30 days): Depending on the type of change, you must provide binding opinions from the public health authority (KHS), the Fire Rescue Service (HZS), and possibly environmental authorities. In some cases, the Building Authority may request these opinions itself as part of coordinated proceedings, but to speed things up it is better to have them arranged in advance.

4. Submission of the application to the Building Authority: Ideally via the Builder’s Portal, alternatively via a data box or in person.

5. Assessment of the application by the Building Authority (30–60 days): The statutory time limit for issuing a decision is 30 days for simple buildings, and 60 days in more complex cases from the commencement of the proceedings. The time limit may run, but it is often suspended when you are asked to supplement missing documents.

6. Issuance of the decision: If the outcome is positive, you will receive the permit for the change of use.

In practice, expect a total duration of 2–4 months if you have prepared everything thoroughly. If issues arise, the time limits may be extended. The attorneys at ARROWS, a Prague-based law firm, handle this agenda daily and know how to go through the process efficiently.

Related questions on the procedural flow

1. Do I have to wait for the decision, or can I start using the premises during the proceedings?
You must wait unconditionally. Use before the decision becomes final is an offence.

2. What is the average waiting time?
For straightforward intentions, approx. 2 months (including preparation). With complexities and missing documents, the proceedings can be prolonged to six months or more.

3. What if the Building Authority rejects the application?
Most commonly, this is due to non-compliance with the zoning plan, disagreement of the affected authorities (public health, fire brigade), or insufficient documentation.

Affected authorities and their role

When you submit an application for a change of use, so-called affected authorities enter the process; they protect public interests under specific regulations in the Czech Republic.

  • Regional Public Health Authority (KHS): Assesses whether the new purpose meets hygiene standards—lighting, ventilation, noise, vibrations, employee facilities. If you change a warehouse into an office,  it will assess daylight requirements, which a warehouse may not have needed.
  • Fire Rescue Service (HZS): Assesses fire safety. A shop has different requirements for escape routes and fire extinguishers than a flat. Minor adjustments may be required here (e.g., installation of fire doors) according to the requirements.
  • Environmental authorities: Assess emissions, waste, or noise.
  • Heritage protection authority: If the building is located in a heritage zone or is a listed cultural monument, their opinion is key.

Each of these authorities has its own requirements. It often happens that the requirements conflict with each other (e.g., heritage protection vs. fire safety), which complicates the entire process.

Risk and impact table: What you specifically risk

To give you a clear idea of the risks associated with underestimating a change of use, we have prepared a clear summary:

Risks and sanctions

How ARROWS can help (office@arws.cz)

Fine for unauthorised use: Using a building contrary to the occupancy approval (final inspection approval) or without a permit may result in a fine of up to CZK 2,000,000 under Czech law.

Representation in misdemeanour proceedings: ARROWS’ attorneys in Prague will represent you before the authorities in the Czech Republic.

Ban on using the building: The Czech Building Authority may order an immediate ban on using the premises for the new purpose.

Legal defence: We will help substantiate why the measure is disproportionate or promptly arrange legalisation of the situation.

Inability to register a business premises: The Czech Trade Licensing Office may require proof of the right to use the premises for business purposes.

Securing permits: We will obtain the necessary permits/approvals (authority, public health authority, fire brigade).

Issues when selling real estate: The buyer (or their bank) will discover a discrepancy between the actual and legal status.

Legalisation of the status (as-built documentation): We will secure a subsequent permit or bring the legal status into compliance.

Insurer refuses to pay: In the event of a fire or accident, the insurer may refuse to pay if the premises were used contrary to the approved use (occupancy approval).

Prevention: By ensuring proper permitting, you eliminate the risk.

Practical tips: How to best prepare for a change of use

Although it may seem simple, in practice there are many pitfalls. Here are a few specific tips:

  • Start by checking the zoning plan. Before you file anything, review the municipality’s zoning plan (often available online). You will find out whether your intended use is permitted in the given location under Czech planning rules.
  • Consult the Building Authority. Use the option of obtaining preliminary information under the Czech Building Act. The authority will tell you exactly what it will require.
  • Focus on high-quality documentation. Even if you are not carrying out construction works, you will need drawings (floor plans) of the existing and proposed state. In many cases you will not manage without a designer’s stamp, especially due to fire safety requirements.
  • Secure the necessary consents. In an apartment building, consent of the owners’ association (SVJ) may be required if the change of use affects common areas or changes conditions in the building.
  • Consult a lawyer. It will save you time and reduce the risk of mistakes. The legal team at ARROWS advokátní kancelář is familiar with the specifics of the new Czech Building Act.
Contact our experts at ARROWS advokání kanceláře: 

Common real-life situations – examples we handle

To give you a concrete idea, let’s look at examples we handle at ARROWS:

  • Case 1: Converting an apartment into an office. The apartment owner wants to lease the premises to an insurance office. The apartment is approved for residential use. A change-of-use permit is required. The Regional Public Health Authority (KHS) will address workplace lighting, and the Fire Rescue Service (HZS) will address escape routes. Timeframe: approx. 3 months.
  • Case 2: Changing a warehouse into a retail shop. An investor has a warehouse and wants to convert it into a shop. Opinions/approvals from the public health authority (staff facilities) and the fire brigade (high requirements for escape routes for the public) are required. Timeframe: 4–6 months.
  • Case 3: Short-term rentals. The apartment owner wants to rent via platforms. In some locations in the Czech Republic, Building Authorities consider this an accommodation service rather than residential use and require a change of use. Without it, fines may be imposed.
  • Case 4: Legalising a historic status. An heir discovers that a cottage has been used as a permanent apartment without a permit. It is necessary to apply for a subsequent permit.

Where to turn for specific advice

If you are not sure whether your plan requires a permit, or you do not know how to start, contact professionals.

ARROWS advokátní kancelář has extensive experience with changes of use of buildings under the new Czech Building Act, and our Czech legal team can review your plan, prepare the application, communicate with the authorities, and represent you.

Contact us at office@arws.cz.

Conclusion

A change of use of a building without construction works may look simple, but legally it is a process that requires care. The Czech Building Act applies uncompromisingly in 2026 as well, and a building may only be used for the permitted purpose. Any deviation carries the risk of a significant fine.

The attorneys at ARROWS advokátní kancelář deal with this issue on a daily basis. We know how to proceed efficiently within the digital building-permit process in the Czech Republic and how to avoid mistakes. If you are planning a change of use, contact us at office@arws.cz.

FAQ – Most common legal questions on change of use without construction works

1. Is it really enough to simply “notify” the change of use?
Usually not. Although the terminology is changing, in practice it is an authorisation process in which the authority assesses whether the conditions are met. A mere “notification” without a decision or consent issued by the authority is generally not sufficient for a lawful change of purpose under Czech law if the building’s requirements are changing.

2. How long does it take?
The statutory time limits are 30 to 60 days. With preparation of documents and obtaining opinions from the relevant authorities, realistically allow 2–4 months.

3. What fine can be imposed?
Under the new Czech Building Act, up to CZK 2,000,000 for using a building contrary to the permit.

4. Do I need a lawyer?
It is not mandatory, but it will save you time and stress. Administrative proceedings have their own rules, and the risk of rejection due to formal errors is high. ARROWS advokátní kancelář is insured for professional liability, which is an additional safeguard for you.

5. Can a neighbour interfere?
Yes—if they are a party to the proceedings, they may raise objections. We can help you with that as well.

Notice: The information contained in this article is of a general informational nature only and is intended for basic orientation. Although we take maximum care to ensure accuracy, legal regulations and their interpretation evolve over time. To verify the current wording of the regulations and their application to your specific situation, it is therefore necessary to contact ARROWS advokátní kancelář directly (office@arws.cz). We accept no liability for any damages or complications arising from the independent use of the information in this article without our prior individual legal consultation and expert assessment. Each case requires a tailored solution, so please do not hesitate to contact us.

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