Joint Liability in Condominiums: The Court of Cassation and the Irrelevance of the Priority of the Wrongful Act (Order No. 17237 of 2025)

Living in a condominium implies sharing spaces and responsibilities, a balance that can sometimes be disturbed by conduct that harms common areas. In such contexts, the issue of liability and its attribution becomes crucial. The Court of Cassation, with Order No. 17237 of June 26, 2025, has provided significant clarification regarding joint liability for wrongful acts in condominium relations, emphasizing a fundamental principle: the irrelevance of the temporal priority in the commission of the damage. This ruling is of great importance for administrators, co-owners, and legal professionals, as it redefines the boundaries of individual and collective responsibility.

The Cornerstone Principle of Joint Liability

The Supreme Court, ruling on the appeal filed by D. against P., reiterated a principle already known in civil law, but whose application in condominium relations deserves particular attention. The maxim contained in Order No. 17237/2025 states verbatim:

In matters of liability for wrongful acts, even in condominium relations, where the conduct of one co-owner damaging the common property is joined by that of another co-owner, both may be held liable indiscriminately, without regard to the priority in the commission of the act.

This excerpt is of fundamental importance. It tells us that if multiple co-owners, through distinct but converging conduct, cause damage to common property, it does not matter who acted first. All those who contributed to causing the harm can be held jointly liable. Joint liability, provided for by Article 2055 of the Civil Code for wrongful acts, means that each of the responsible parties can be called upon to compensate for the entire damage, without prejudice to their right to seek recourse against the other co-debtors for their respective shares. The innovative aspect, or rather, reinforced by the Court of Cassation in this context, is precisely the exclusion of any relevance of the chronology of events. One cannot justify one's own harmful conduct by claiming that "someone else had already started damaging it."

The Specific Case: The Obscuring of the Stairwell

To fully understand the scope of this decision, it is useful to examine the specific case that led to the ruling by the Court of Cassation. The matter concerned the placement, by a co-owner, of plasterboard panels on one of the two "faces" of a glass wall in a condominium stairwell. The Court of Appeal of Palermo had initially excluded that this intervention had prejudiced the brightness of the stairwell, arguing that the obscuring had already been carried out by another co-owner on the other face of the same wall. In practice, the Court of Appeal had considered that the damage to the brightness was already pre-existing and not significantly aggravated by the new conduct.

The Supreme Court, however, quashed this decision, highlighting how the Court of Appeal's approach was erroneous. The fact that another co-owner had already compromised the brightness does not exclude the liability of the second party who, with their action, contributed to the same damage or perpetuated it. The important thing is that the conduct objectively contributed to the damage to the common property, in this case, the reduction of the brightness of the stairwell, which is an essential common asset for the use and safety of the building.

Legal and Jurisprudential Foundations

The decision of the Court of Cassation is rooted in fundamental pillars of our legal system. Firstly, Article 2043 of the Civil Code, which establishes the general principle of "neminem laedere" (do not harm others): any intentional or negligent act that causes unjust damage to others obliges the perpetrator of the act to compensate for the damage. Added to this is Article 1102 of the Civil Code, concerning the use of common property, which allows each participant to use the common property, provided that they do not alter its intended purpose and do not prevent other participants from using it equally according to their right. The conduct of obscuring the stairwell clearly falls within a violation of these principles.

The Court of Cassation, by invoking the concepts of liability and solidarity, reaffirms that the focus must be placed on the causation of damage and not on the temporal sequence of conduct. This principle is crucial for the protection of common areas and to ensure that co-owners always act in compliance with collective interests. Previous case law, such as rulings No. 1757 of 1987 and No. 3942 of 1991, as well as the United Sections No. 13143 of 2022, had already outlined a path that this order consolidates and further specifies. In particular, the idea that common property must be preserved from any conduct that diminishes its value or usability, regardless of who initiated the harmful process, is strengthened.

• Irrelevance of temporal priority: Contribution to the damage is what matters, not who acted first.
• Focus on damage causation: Any conduct that objectively contributes to harm to common property is relevant.
• Protection of common property: The primary objective is the safeguarding of the integrity and usability of shared spaces.
• Individual and collective responsibility: Each co-owner is responsible for their actions, even if they are part of a context of pre-existing damage.

Conclusions and Final Reflections

Order No. 17237 of 2025 by the Court of Cassation represents a clear warning to all co-owners and a fundamental guideline for administrators. The management of common areas requires attention and compliance with regulations, and the tendency to minimize one's responsibility by invoking the prior conduct of others is no longer accepted. This ruling strengthens the protection of common property and promotes greater awareness of individual responsibilities within the condominium context. For any doubts or for a correct interpretation and application of these principles, it is always advisable to consult legal professionals experienced in condominium law, capable of offering the best assistance and advice.