Purpose The purpose of this study is to investigate the management of intragroup conflicts occurring in project design teams during pre-contract stages that affect the project deliverables of construction projects implemented in Sri Lanka. Design/methodology/approach A qualitative approach with a case study research strategy was used in the study. The required empirical data were collected by conducting expert interviews and reviewing the documents used in four selected projects implemented in Sri Lanka. All the projects used traditional separated procurement systems and had re-measurement contracts. Manual content analysis was used to analyze the collected data. Findings The study findings revealed the different types of intragroup conflicts that arise during the pre-contract stages of projects within project design teams of construction projects implemented in Sri Lanka and the causes and effects of those conflicts on project deliverables. The study recommends proactive strategies that can be adopted to manage those conflicts. Originality/value A dearth of literature on the association between the intragroup conflicts that arise during the design stages of construction projects and project deliverables exists. This study bridged this research gap. It is novel because it reveals the impact of intragroup conflicts that occur during the pre-contract stages of construction projects on project deliverables and identifies several proactive strategies that will assist in managing those intragroup conflicts.