Facilities maintenance tasks require gathering and sharing large amount of information related to facilities components. This information covers historical inspection data and operation information. Despite the availability of sophisticated Computerized Maintenance Management Systems (CMMSs), these systems focus on the data management aspects (i.e. work orders, resource management and asset inventory) and lack the functions required to facilitate data collection and data entry, as well as data retrieval and visualization when and where needed. Building Information Modeling (BIM) provides opportunities to improve the efficiency of CMMSs by sharing building information between different applications/users throughout the lifecycle of the facility. This paper proposes a framework for a collaborative BIM-based Markerless Mixed Reality (BIM3R). The framework integrates CMMS, BIM, and video-based tracking in a BIM3R setting to retrieve information based on time (e.g. inspection schedule) and the location of the user, visualize maintenance operations, and support collaboration between the field and the office to enhance decision making. Finally, a prototype system is implemented and a case study is applied to demonstrate the feasibility of the proposed approach.