For rapid development and accelerated growth of the construction sector in Nigeria, the public private partnership (PPP) if embraced by the all the level of government and the private sector will improve and enhance accelerated growth of the industry. The purpose of this paper is to examine the types of infrastructural projects most suitable using public-private partnership (PPP) for execution and identify the critical success factors in PPP on infrastructural projects with a view to strengthening the partnership between the public (government) and private sector. The overall goal is to enhance infrastructural projects delivery in Nigeria. The primary data consists of survey questionnaires, drawn based on the identified factors on existing literature on critical success factors (CSFs). The structured questionnaires were administered on participants that were involved in the execution of projects through PPP arrangements. The results from the analysis indicate the provision of electricity and water with RII of 0.65, health and social services with RII of 0.63 and transport with RII of 0.62 with the rank of 1st, 2nd and 3rd respectively. However on the critical success factors (CSFs), the study identifies involvement of government providing guarantee with RII of 0.70, committed and organized public sector with RII of 0.69 and cost and benefit assessment that is realistic with RII of 0.68 with the ranks of 1st, 2nd and 3rd respectively. What needs to be done is to ensure that all the success factors responsible for successful implementations of PPPs are well structured in a way that its optimum performance can be guaranteed. Also, in identification of the critical factors in PPP it would help to develop a body of PPP knowledge. This knowledge would help in the establishment of relevant laws, guidelines and regulations and in the development of efficient frameworks for best PPP practices.