Perdu Trouvé: Reimagining Void Through Urban Regeneration Architecture

In contemporary urban discourse, the concept of the void has shifted from being perceived as absence to being recognized as latent potential. "Perdu Trouvé" explores this transition through a speculative yet grounded approach to urban regeneration architecture, where forgotten infrastructural fragments are reinterpreted as active civic spaces.

Conceived by llLab Architects and shortlisted in the Salut Paris competition, the project operates within the interstitial conditions of the city. It challenges conventional planning methodologies by asking a fundamental question: should we fill urban voids, or should we learn to inhabit them?

Site as Narrative: Reading the Forgotten Infrastructure

The visual language of the project reveals a layered reading of the site. Rail tracks, residual corridors, and fragmented urban edges are not treated as constraints but as narrative devices. The proposal maps these forgotten infrastructures and reframes them as connectors between disconnected urban fragments.

Rather than imposing a singular masterplan, the intervention adopts a distributed logic. It operates through a sequence of insertions that respond to context, scale, and human activity. The railway corridor, often perceived as a barrier, becomes the primary spine of interaction.

Beyond the Plan: Questioning Architectural Control

"Another plan?" the drawings provocatively ask. This question directly critiques the rigidity of conventional urban planning systems. Instead of prescribing fixed outcomes, the project introduces a framework that enables adaptability.

The architecture resists finality. It remains open-ended, allowing users to reinterpret space over time. This aligns with contemporary urban regeneration strategies that prioritize participation, temporality, and incremental development.

Spatial Strategy: Folding Ground and Weaving Movement

A defining gesture within the proposal is the folding of the ground plane. Elevated walkways, bridges, and platforms intersect the railway corridor, creating multi-level interactions. These interventions blur the distinction between infrastructure and public space.

Movement becomes architecture. Circulation paths are not merely functional but experiential, offering varied intensities of engagement. From quiet observation decks to active communal zones, the spatial system accommodates diverse uses.

Architecture of Participation: Designing for People

The project foregrounds human activity as its primary driver. The visualizations depict markets, performances, informal gatherings, and everyday interactions. This emphasis on occupation reflects a shift from object-based design to experience-driven architecture.

Temporary structures, fabric canopies, and lightweight frameworks support a dynamic program. These elements allow users to appropriate space based on need, reinforcing the idea that architecture is not static but continuously evolving.

Rethinking Modules: From Standardization to Flexibility

The project explicitly critiques traditional modular systems. While acknowledging the efficiency of modular construction, it rejects rigid spatial modules in favor of adaptable components.

Instead, the proposal introduces a hybrid system composed of structural frameworks, hard enclosures, and soft enclosures. This approach enables variability without sacrificing coherence. Users can assemble, modify, and personalize spaces, creating a participatory architectural language.

The Role of the Void: Absence as Opportunity

At its core, "Perdu Trouvé" reframes the void as an active condition. The empty spaces within the city are not deficiencies to be filled but opportunities to be engaged.

This perspective aligns with emerging trends in urban regeneration architecture, where adaptive reuse and minimal intervention strategies are prioritized. By working with what already exists, the project reduces material consumption while enhancing spatial richness.

Experiential Urbanism: Layers of Engagement

The project constructs a multi-scalar experience. At the urban scale, it reconnects fragmented neighborhoods. At the architectural scale, it creates diverse spatial typologies. At the human scale, it fosters interaction, discovery, and ownership.

The phrase "I’d rather do it myself" embedded within the visuals encapsulates this ethos. It signals a shift toward user agency, where inhabitants become active participants in shaping their environment.

"Perdu Trouvé" presents a compelling argument for rethinking how cities engage with their forgotten spaces. By embracing the void, questioning rigid planning systems, and prioritizing adaptability, the project offers a forward-looking model for urban regeneration architecture.

It does not provide a definitive solution. Instead, it establishes a framework that evolves over time, driven by people, context, and changing needs. In doing so, it transforms the act of filling a void into an ongoing process of discovery.

Project Credits: llLab Architects

Recognition: Shortlisted Entry, Salut Paris Competition