Is there a disclosure requirement for future renovations of a property, such as a roof in need of renovation?

Disclosure obligation and liability for defects

In principle, there is no general obligation in Switzerland to inform the buyer of future, age-related renovations without being asked. The “bought as seen” principle applies. However, if there is a hidden defect — i.e. damage that the buyer cannot identify during a normal inspection (e.g. water damage to the roof that is already known but painted over) — the seller must disclose this. A contractual exclusion of warranty is absolutely ineffective in the event of fraudulent concealment of such defects.

The classic in a sales contract: The disclaimer

Almost every Swiss real estate purchase contract in 2026 contains the clause that any liability for physical or legal deficiencies is excluded. For you as a buyer, this means that you take over the house with all the faults it has.

This clause is legal and widely used because it gives the seller the assurance that they will not be held liable for any broken light bulb or jammed door after the sale. The seller can assume that you have thoroughly inspected the object. So if the roof is simply “old” but was dry during the inspection, there is no defect that the seller would have to proactively report. The age of a component is not a mistake, but a characteristic that you must take into account in the purchase price.

Where the signs of aging end and the deficiency begin

In order to create legal clarity, a distinction must be made between the usual restructuring backlog and a genuine defect.

A roof in need of renovation that is 30 years old meets the standard of a 30-year-old house. There is no disclosure requirement here, as every reasonable buyer must expect that a renovation is pending in the foreseeable future. The seller does not have to “advise”, but simply “not deceive.”

A defect, on the other hand, exists when the roof has already been patched several times because water penetrates and the seller conceals this fact. As soon as the use of the property is restricted or the building fabric is threatened by a circumstance known to the seller, the moral question becomes a legal obligation.

The fraudulent deception: The silence of sellers

The buyer's sharpest sword against the exclusion of warranty is the allegation of fraudulent misrepresentation (Art. 199 OR). There is malice when the seller is aware of a defect but assumes that the buyer does not discover it and therefore deliberately conceals it.

Particularly when it comes to the roof, the evidence is often tricky. If the seller has applied fresh paint to the attic to conceal water stains, the case is clear: That is malice. In such a case, the buyer can still take recourse even years after the purchase, as an exclusion of liability in the event of intentional concealment is void. The case law in 2026 is very friendly to tenants and buyers: A seller must not claim that he had “no idea” if the circumstances clearly indicate his knowledge.

The buyer's audit obligation: Trust is good, expert opinion is better

Since the hurdles for proving fraudulent deception are high, the buyer has a duty. In Switzerland, buyers are expected to check the property as an average person with due care would.

In 2026, this includes the involvement of a building specialist or architect before the notary appointment. A layman cannot judge whether the tiles on a roof are just dirty or already porous. If you do without an expert, the court will later accuse you of breaching your audit obligation. Defects that an expert could have seen during an inspection are considered “obvious defects” — the seller is no longer liable for these under any circumstances after signing the contract.

Special case 2026: Energy status and GEAK

In 2026, a roof in need of renovation usually also means a poor energy balance. Here, the legal situation has indirectly worsened. In many cantons, a cantonal building energy certificate (GEAK) is mandatory when selling.

This pass is a powerful document for transparency. If the GEAK has class G (very poor) for the roof, the buyer cannot later claim that he did not know anything about the need for renovation. The document serves as proof of relief for the seller: “I have disclosed the energy status.” Anyone buying a house with a GEAK rating of G as a buyer implicitly accepts the need for renovation. The roof is then no longer a defect, but a documented characteristic of the object.

Practical tips for a legally secure change of property

To ensure that the house purchase does not end before the judge, both parties should pursue clear strategies in 2026.

For sellers: transparency protects against liability

The safest way for you as a salesperson is to flee forward. List all known problems in writing — ideally as an attachment to the purchase contract. Mention the age of the roof, past repairs, and a note that renovation is recommended. If the buyer signs this, any subsequent action for malice has in fact no chance. In this case, transparency is not a weakness, but your insurance against long-standing lawsuits.

For buyers: Questions, questions and more questions

Don't rely on flowery statements in the exposé, such as “well-kept condition.” Ask specific questions: When was the roof last checked? Are there any moisture problems? Ideally, have the answers confirmed briefly in writing or keep a viewing log. If the seller answers a direct question incorrectly, this is a guaranteed characteristic — and he is liable for such even if the warranty has been excluded in the contract.

Conclusion: Responsibility lies with both sides

Is there a disclosure requirement for future restructuring? No, as long as the component functions according to its age. Yes, as soon as there is a real defect that you don't see at first glance.

In summary, the Swiss tenancy and real estate law of 2026 requires vigilance from the buyer and honesty from the seller. A roof in need of renovation is usually a negotiating point for the price, not a case for the court — unless it is fraudulently concealed. Anyone who takes GEAK's energy requirements seriously and invests in a professional audit before buying ensures the value of their property in the long term and sleeps peacefully even in heavy rain.

glossary

• Disclaimer of warranties: Contractual agreement according to which the seller is not liable for defects in the item.
• Hidden defect: A defect that is not apparent during a normal inspection and only becomes apparent later.
• Malicious deception: Conscious concealment of defects or allegations of false facts by the seller.
• GEAK (cantonal building energy certificate): Official document for evaluating the energy quality of a building.
• Assurance: An explicit confirmation from the seller of a specific characteristic of the property (e.g. “The roof was completely renovated in 2024”).