PurposeBuilding information modeling (BIM) is a growing technology and methodology for project design in the construction industry. However, when the project design team designs with BIM in a free-form manner (without a qualified instructor), it is not clear how behavior or trust might develop among project team members, nor if there are variables that might influence the improvement of such collaboration.Design/methodology/approachA sample of 92 responses was obtained from managers of project design firms in the architecture, engineering and construction (AEC) sector. The questionnaire data were analyzed using partial least square structural equation modeling (PLS-SEM).FindingsThis paper provides an explanation, from a happiness management perspective, to reflect on the importance of establishing policies to enhance effective communication between project team members in BIM design, as it improves trust between team members and their collaborators, developing the overall satisfaction of all the agents involved in the project.Originality/valueThe researchers suggest that there is a gap in the literature on how effective communication influences the implementation of BIM methodology.