Based on the recent “D4.1 Urban Mining Concept” deliverable, the SUM4Re project has made significant progress in validating its digital workflow for identifying and assessing materials in existing buildings. The project, which began in June 2024 , aims to create “materials banks” from the built environment by combining urban mining with automated data acquisition.

The core progress involves the successful application of this workflow at two distinct European pilot sites :

• Digital Audits : Standardized Pre-Demolition Audits (PDAs) were conducted using the CIRDAX mobile app for on-site data capture. This data was then processed on the Concular analysis platform.
• Quantitative Findings : The workflow quantified key performance indicators for each pilot.
  • The Nordic pilot (Svalbard), a lightweight timber building, showed a 98% potential for mass reuse, a 33% Circularity Performance Index (CPX), and an estimated residual material value of approximately €580,000.
  • The Dutch pilot, a heavy mineral construction in The Hague, demonstrated a 77% potential for high-quality recycling, achieved a 24% CPX, reduced CO₂ emissions by 53.3 tonnes, and had a residual value of over €2.7 million.

This work provides a strong, data-driven foundation for developing site-specific Urban Mining Concepts and confirms the ecological and economic feasibility of the project’s approach.