Housing is one of the most basic and oldest developments of mankind, because of its necessity and importance. This research study aimed to evaluate the roles of various participants in Mass Housing construction project delivery in Sokoto. A total of 200 questionnaires were distributed to five professional working either in consultancy or client organizations. Feedbacks received were analyzed using both descriptive and inferential statistics with the aid of SPSS 16.0. Results indicated three broad categories of knowledge and skills that support roles of Professionals in construction project delivery: managerial, technical and generic knowledge and skills. Identified knowledge and skills underlying the three broad categories were found to fall between moderate to high impact on contractors?theperformance with weighted mean values between 3.26-4.35. The levels of the contractors? roles in the identified knowledge and skills areas were also analyzed. The result suggests knowledge and skills gap with weighted mean values between 2.68-3.37, which need to be resolved through contractors training and education. Keywords: Role, Professional, Housing, Construction