Apartment Layout Changes in Czech Condominiums: SVJ Consent and Risks
Are you planning to change your apartment’s layout, such as combining rooms or intervening in load-bearing walls? You will need to obtain approvals from the Owners’ Association (SVJ) and have the structural integrity assessed. The path to a new living arrangement involves legal and technical risks under Czech law that can surprise even experienced owners. In this article, the attorneys of ARROWS, a Prague-based law firm, explain what risks you may face and how to manage the entire process safely.
Article contents
- What the legislation allows and what it prohibits
- Consent within the building and practical obstacles
- Structural integrity and safety, and hidden risks
- Common areas of the building and what is permitted
- Which changes to common areas are problematic
- Project approval and procedural details
- Contracts and documentation
Quick summary
- Changing the layout of an apartment may require the consent of the SVJ (the Czech unit owners’ association) and, in certain cases, approval from the Czech building authority. If you overlook these requirements, you may lose the ability to use the apartment or end up in litigation in Czech courts.
- Intervening in load-bearing structures or the building’s common areas involves serious legal and material risks under Czech law. An incorrect approach can lead to substantial fines and liability for damages.
- Dealing with surprises such as hidden installations or resistance from neighbours can delay the project by months. The Czech legal team at ARROWS advokátní kancelář regularly handles such disputes and can help speed up the process.
What changing an apartment’s layout means
Changing an apartment’s layout means a substantial rebuild of its internal structure. This includes removing, relocating, or adding walls, combining apartments, creating new rooms, or changing their size and purpose. In Czech legal terminology, this process is referred to as a construction alteration.
In the context of an apartment building, this is a complex matter because your apartment is not an isolated space. Each unit forms part of a system of common areas, such as load-bearing structures and utility lines. Any intervention in the apartment therefore affects the entire building and the other owners.
What the legislation allows and what it prohibits
The key legal regulations are the new Building Act (Act No. 283/2021 Coll.) and the Civil Code (Act No. 89/2012 Coll.), which governs unit co-ownership in the Czech Republic. The essential point remains that not everything that can be done physically is also legally permissible under Czech legislation.
When you need approval from the building authority
Under the current Czech Building Act, it depends on whether the alteration affects load-bearing structures, changes the appearance of the building, or impacts fire safety. You will need project approval (a building permit) if you plan interventions in load-bearing structures or a change to the building’s appearance. Approval is also required for changes affecting fire safety or for expanding the apartment at the expense of common areas.
Conversely, if you carry out construction alterations that do not affect load-bearing structures and do not change the appearance of the building, the law typically does not require approval. However, this does not relieve you of the obligation to comply with technical standards and obtain the SVJ’s consent. Legal advice from ARROWS advokátní kancelář can help you determine which category your renovation falls into, so you can be confident that no one can challenge you for an “unauthorised construction” under Czech law.
Owners’ consent and authority approval
Even experienced owners often make mistakes in this area, so it is necessary to distinguish between two types of consent. Consent within the building (private-law) is legally different from approval by the Czech building authority (public-law).
Consent from the person responsible for managing the building (typically the SVJ) is required under the Czech Civil Code whenever you intervene in load-bearing structures or change the appearance of the building. The consent of all owners is required if the size of the share in the common areas changes. Project approval is then issued by the building authority as an instrument of the state.
Main legal risks and sanctions when changing an apartment’s layout
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Risks and sanctions |
How ARROWS helps (office@arws.cz) |
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Refusal of project approval: The building authority rejects your application because documents are missing, the design documentation is defective, or the plan breaches building standards. |
Preparation and review of documentation: The attorneys at ARROWS advokátní kancelář, in cooperation with designers, ensure the documentation is in order. |
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Opposition from the SVJ or neighbours: The SVJ committee or neighbours refuse to give consent, whether for justified or unjustified reasons. |
Negotiations with the SVJ and owners: The attorneys at ARROWS advokátní kancelář negotiate terms with the SVJ committee, explain the legal framework under Czech law, and look for solutions. |
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Carrying out construction without approval (unauthorised construction): If you build without the required approval, you expose yourself to a fine and an obligation to restore the apartment to its original condition. |
Legal and construction-related advice: The attorneys at ARROWS advokátní kancelář will clarify whether your planned change requires approval and help you obtain it in the Czech Republic. |
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Compromising the building’s structural integrity and safety: Demolishing a wall without a structural engineer can damage the stability of the building and you may face liability for damages. |
Contractual arrangements with experts: ARROWS advokátní kancelář will help you set up contracts with designers and structural engineers so that their responsibility is clearly defined. |
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Breach of technical standards: Changing the layout without checking electrical wiring, gas, or water systems may lead to breaches of Czech technical standards (ČSN). |
Expert legal assessments: We will help ensure that contracts for work include obligations to comply with current standards and to provide inspection and test reports. |
Consent within the building and practical obstacles
The Czech Civil Code provides that for an alteration to an apartment that affects common areas, you need the consent of the person responsible for managing the building. At this stage, theory often collides with the reality of relationships within the building.
Who must consent and why
As a standard rule, the statutory body of the SVJ decides—i.e., the committee or the chair. However, if the alteration affects common areas in a way that changes internal arrangements, the SVJ’s bylaws may require the consent of the meeting of owners. An extreme situation arises if you change the apartment’s floor area, for example by annexing a corridor. This changes the co-ownership shares of all owners in the building and requires an agreement of all affected owners on an amendment to the owner’s declaration.
Practical risks when seeking consent
Reality is complicated because neighbours may not vote rationally, and some consent disputes last for years. During this time, your project is put on hold and money invested in preparations is tied up. The attorneys at ARROWS advokátní kancelář regularly handle such disputes and know how to work with dissatisfied neighbours. We can draft the request so that it complies with the bylaws and Czech law and, where appropriate, replace consent with a court decision.
Related questions regarding legal consent
1. What happens if the Owners’ Association (SVJ) refuses consent without giving reasons?
The unit owner may apply to the court to review the SVJ body’s decision. The right to modify your own apartment is strong under Czech law, but it must not endanger others.
2. Do I need written consent, or is verbal consent enough?
Always insist on written consent or minutes from the owners’ meeting. Verbal consent is difficult to prove in the event of a dispute.
3. Does the situation change if the owner changes?
SVJ consent is tied to the unit and the intended works, not necessarily to a specific person; however, if the owner changes during the process, the supporting documents need to be updated.
Structural integrity, safety, and hidden risks
At this point, the legal issues intersect with construction and technical reality. Load-bearing elements of the building, such as slabs/ceilings and load-bearing walls, are common parts of the building under Czech law, even if they are located inside your apartment.
Where problems tend to be hidden
A common surprise during the design phase is discovering that a wall believed to be a non-load-bearing partition actually has a bracing function for the entire building. The designer (a certified structural engineer) must then propose adequate measures, which increases the cost of the project. Another risk is carrying out the works contrary to the design, when the contractor “simplifies” the procedure. If the building’s structural integrity is compromised, you are primarily liable as the owner and developer, including vis-à-vis the Czech authorities.
Structural assessment
You cannot do without a certified structural engineer when intervening in load-bearing structures, because a structural calculation is a mandatory attachment to the application for a permit for the intended project. We always recommend archiving all documentation, including permits, designs, and structural reports. Risks arising from breaches of structural integrity and construction standards
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Risks and penalties |
How ARROWS helps (office@arws.cz) |
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Cracks and damage in neighbouring apartments: Construction works cause cracks for neighbours, who then sue you for damages. |
Representation in court proceedings: ARROWS attorneys will represent you, defend your rights, and pursue recourse claims against the construction company. |
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Fine from the building authority: The authority finds that you are building without a permit or contrary to it, with fines that can be substantial. |
Representation in administrative proceedings: ARROWS attorneys will represent you in dealings with the authority and help minimise penalties. |
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Insurance claim and insurer refusal: The insurer may reduce or deny coverage if the damage arose from unprofessional works. |
Negotiations with the insurer: ARROWS attorneys negotiate with insurers and help enforce your entitlement to insurance benefits. |
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Order to remove/undo the works: The building authority may order the apartment to be restored to its original condition if the works endanger safety. |
Legal defence: We look for ways to obtain a retrospective permit for the works, where technically possible. |
Common parts of the building and what is permitted
An apartment building is a legally complex organism: you own your apartment, but you are also a co-owner of the common parts. These are defined in Section 1160 of the Czech Civil Code and in Government Regulation No. 366/2013 Coll.
Which changes to common parts are problematic
An apartment owner must not, without consent, arbitrarily occupy or alter common areas. Problematic examples include expanding the apartment at the expense of a common corridor or interventions in the building’s external envelope. Permits are also required for interventions in vertical service risers or for replacing windows if their appearance changes.
Common installations and liability
If you damage a common riser pipe or gas line during a renovation, you are liable for the resulting damage. That is why, before any major works, it is recommended to carry out a thorough survey of utility routes and installations.
Related questions on common parts
1. Who repairs riser pipes after a renovation?
Riser pipes are a common part of the building, but if you damage them, you pay for the repair. Routine maintenance is the responsibility of the SVJ.
2. What insurance do I need?
We recommend liability insurance related to property ownership and personal liability, ideally with a high coverage limit.
Permit for the intended project and procedural details
Building permitting in the Czech Republic has undergone major changes in recent years thanks to digitalisation and the introduction of the Builder’s Portal (Portál stavebníka). Today, the procedure is typically conducted as proceedings for a permit for the intended project.
- When to file the application - you submit the application for a permit for the intended project via the Builder’s Portal or in paper form. This obligation applies if your works fall under projects requiring a permit, such as interventions in load-bearing structures.
- Supporting documents and documentation - the building authority will require documentation for the permit prepared by an authorised professional and consents from the relevant authorities. Consent of the building owner is also required; in the case of an SVJ, this is evidence of the right to carry out the works.
The fact that the documentation looks fine on paper does not mean the authority will approve it without reservations. Authorities may have specific requirements that ARROWS attorneys know how to anticipate and address.
Liability, insurance, and potential risks
As the developer, you bear responsibility for preparing and carrying out the works in compliance with Czech law and for damage caused to third parties. Hiring a contractor does not fully relieve you of liability, especially public-law liability. Liability insurance is essential, because if you carry out the works yourself, the risks remain with you. If you hire a company, insist in the contract that it has business liability insurance in place.
Contracts and documentation
A high-quality contract for work is absolutely essential, because a template downloaded from the internet will not protect you sufficiently. The contract should include the precise scope of works, a fixed price, and completion deadlines. The warranty period and the contractor’s obligation to maintain insurance are also important.
ARROWS, a Prague-based law firm, can help you prepare and review contracts so that they truly protect you. Contact us at office@arws.cz.
Conclusion
Changing an apartment’s layout is a complex process that requires obtaining SVJ consent and often also a permit from the building authority. You must engage a structural engineer and have all contracts properly in order—otherwise you risk significant fines and disputes.
The ARROWS law firm team deals with these matters on a daily basis and knows how to protect your investment under Czech law. We know how to communicate with authorities and SVJs and how to set up watertight contracts. Want certainty? Email us at office@arws.cz.
FAQ – Most common legal questions about changing an apartment’s layout
1. Do I need a building authority permit even if it is only a small change?
It depends on whether you intervene in load-bearing structures, change the appearance of the building, or affect fire safety. Standard masonry partitions inside an apartment can often be altered without a permit, but technical standards must always be complied with.
2. How long does it take to obtain a project permit?
The Building Act sets time limits, typically 30–60 days for simple structures, but in practice it depends on the workload of the relevant authority in the Czech Republic. With a well-prepared application from professionals, the process can be significantly accelerated.
3. What happens if I build “illegally”?
The Building Authority may initiate proceedings for the removal of the structure and impose a fine under Czech legislation. At the same time, you expose yourself to the risk of lawsuits from neighbours and complications if you decide to sell the apartment in the future.
4. Who is responsible for structural safety?
An authorised designer is responsible for the correctness of the design, and the contractor, together with their site manager, is responsible for the correctness of the execution. As the investor, you must ensure that these persons hold the relevant authorisations required in the Czech Republic.
5. Can my neighbours stop a renovation because of noise?
Renovations involve noise, which neighbours must tolerate to a reasonable extent. However, you must comply with night-time quiet hours and the rules set out in the house rules; otherwise, neighbours may seek protection through a neighbour dispute lawsuit.
Notice: The information contained in this article is of a general informational nature only and is intended to provide basic guidance on the topic based on the legal situation as of 2026. Although we take the utmost care to ensure accuracy, legal regulations and their interpretation evolve over time. We are ARROWS advokátní kancelář, an entity registered with the Czech Bar Association (our supervisory authority), and for maximum client protection we are insured for professional liability with a limit of CZK 400,000,000. To verify the current wording of regulations and their application to your specific situation, it is necessary to contact ARROWS advokátní kancelář directly (office@arws.cz). We accept no liability for any damages arising from the independent use of the information in this article without prior individual legal consultation.
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