We provide intuitive visualization and management of BIM on mobile devices and on web-based platforms. When both as-built and as-planned models exist, we offer an overlaid view of both models. The models can be shown in virtual reality and augmented reality using the latest smartphones or with special goggles such as Oculus, Vive, Microsoft Hololens. The overlaid models combined with mixed-reality interface enables both immersive remote virtual walkthrough of the as-planned and as-built site, and highly-effective digital information portal on the physical site. This powerful combination offers a unique user experience that boosts a wide range of services on construction performance and facility management, such as progress monitoring, cost control, safety assurance, productivity enhancement, energy retrofitting, and sustainability improvement.