This paper explores key social factors that impact tacit knowledge sharing among quantity surveyors in the North Western Nigeria. Purposive sampling technique was used to select the respondents. Questionnaire was designed and administered to management and senior quantity surveyors in construction companies within North Western Nigeria. Descriptive statistics was used in the analysis. Results show that site meeting, seminars and workshops and internal training as the suitable methods of sharing tacit knowledge among quantity surveyors in North Western Nigeria. For factors influencing tacit knowledge sharing behavior the results show creativity, trust and motivation as the key major factors. It is concluded that the greatest challenge is that construction knowledge, often being tacit, retained by the individuals and organisations, finally disappears once the project is completed. It is therefore recommended among others that construction organisations should consider the three major critical factors: creativity, trust and motivation in their organizations for smooth tacit knowledge sharing practices.