The Legal-Commercial Duality of Short Stays: Regulation, Jurisprudence, and Externalities in Contemporary Residential Use

 

The consolidation of the short-term rental model, driven by digital platforms like Airbnb, marks a structural inflection point in contemporary real estate law. It uniquely tensions the boundaries between private property, social function, and urban regulation. This phenomenon shifts residential property from its classic function as a home to the logic of an operational financial asset, whose performance depends not only on physical or locational attributes but on a complex set of legal, regulatory, and institutional variables.

1. The Brazilian Jurisprudential Epicenter

In Brazil, the heart of this transformation lies in the jurisprudence of the Superior Court of Justice (STJ). In landmark cases such as REsp 1.819.075/RS, the Court established a decisive conceptual distinction between "seasonal rental" and "atypical lodging."

The Court ruled that high-turnover occupancy mediated by digital platforms does not automatically fall under the Tenancy Law (Lei do Inquilinato). Instead, it may be characterized as a lodging activity, especially when there is fragmented use, a lack of connection between occupants, and operational dynamics similar to those of a hotel. This legal reclassification is not merely semantic; it legitimizes the intervention of the homeowner association (condomínio) as a regulator of the property's destination.

2. Private Rights vs. Collective Governance

The direct consequence is the relativity of the individual right to use the property against the collective interest of the building. The consolidated understanding suggests that if a residential destination is expressly stated in the bylaws, the association may legally prohibit short-stay economic exploitation based on "deviation of purpose."

However, provincial courts still show divergent decisions regarding the need for an express ban versus a generic "residential use" clause. This creates legal risk for the investor, who faces an unstable interpretative scenario.

3. International Paradigms: The Case of Barcelona

Globally, Barcelona represents the most emblematic paradigm of state intervention. Since 2014, the city has implemented restrictive policies based on license limits and the massive removal of listings to curb rising prices and "overtourism."

Interestingly, subsequent analyses show that despite reducing short-term supply, structural housing access problems persisted. This demonstrates that suppressing short stays often functions more as a symbolic containment mechanism than a structural solution to housing scarcity.

4. Social Interest Housing (HIS) and Urban Externalities

In Brazil, a critical tension occurs in Social Interest Housing (HIS), particularly in São Paulo. These developments are built with urban incentives and public subsidies for low-income families. Using these units for short-term platforms distorts the program's public purpose. Consequently, there are growing administrative restrictions to prevent private investors from capturing public benefits meant for social policy.

Furthermore, urban policy incorporates a dimension of risk management. High-turnover lodging in strictly residential zones can generate negative externalities related to urban security and the protection of vulnerable groups (children and adolescents). Environments of anonymous, transient circulation can hinder social control mechanisms.

5. Economic Impact and the "Legal Vacancy" Risk

From an economic perspective, regulatory uncertainty immediately impacts asset pricing. Properties in restrictive condominium environments carry a legal risk premium, resulting in a higher discount rate and lower Present Value (PV) of projected cash flows.

The possibility of activity interruption introduces the variable of "legal vacancy"—a systemic risk that traditional property management cannot mitigate. Sophisticated investors now prioritize assets with operational viability consolidated from the start, such as:

• Mixed-use developments.

• Apart-hotels.

• Buildings with permissive, modern bylaws.

Conclusion: Institutionalization as the Path to Value

The trend is the progressive institutionalization of short stays. The model is evolving from an informal practice into a regulated activity with compliance requirements and urban adequacy.

Empirically, we see the rise of a new real estate typology specifically designed for short stays. These assets incorporate:

• Advanced access control and 24/7 monitoring.

• Digital guest management.

• Integration between HOA administration and rental operations.

In the contemporary real estate market, legal certainty is no longer an accessory; it is central to value formation. The investor who ignores this legal-regulatory component makes a strategic error, pricing the asset only through a market lens while disregarding the very factors that will ultimately determine its performance.