This study examines the relationship between business models for energy efficiency projects and the measures implemented in renovation and new construction in France. A Hierarchical Cluster Analysis (HCA) is applied to 20 case studies using the One-Stop Shop and Turnkey Contract models. To further explore correlations, Cramér’s V-test assesses the relationships between climate zones, business models, and photovoltaic system installations. Two clusters emerge: Cluster 1, in continental climate zones, includes renovated buildings under the One-Stop Shop model with public incentives. Cluster 2, in oceanic climates, consists of new constructions under the Turnkey Contract model, without government support. Significant differences are observed in costs, surface area, and technologies used. Cramér’s V-test confirms the link between climate zone, business model, and technology adoption, showing that solar radiation influences photovoltaic system installation. The oceanic climate's favorable conditions explain the higher use of such technologies in new constructions. These findings highlight the need to adapt business models to the local climate and building conditions. The study proposes targeted measures for policymakers to optimize energy efficiency through differentiated approaches.