The Paris Habitat demonstration applies a participatory, multi-level circular decision-making process developed by TU Delft to guide the renovation and densification of a 1950s social housing complex. The process connects strategic, scenario, and product-level thinking — combining Cross-Impact Balance (CIB) analysis, Analytic Hierarchy Process (AHP), and Fuzzy-TOPSIS to explore and rank circular renovation pathways. Supported by AI-based visualisation and narratives, it helps align technical, social, and environmental priorities, clarify trade-offs, and extend the use life of real estate assets through a transparent and replicable approach.