The issue of awarding projects to the best contractors has been a big challenge in Nigeria, mostly, awarding of contracts are based on sentiments and lowest bidder because there is no regulating system that buttresses qualified contractors automatically, resulting to contracts been removed from a contractor and re-awarded to another due to the lapses seen on the part of the contractor after awarding of contract and the project execution in progress, this has adverse effect on the economy of our country, as time and resources has been wasted and the continue wasting these resources attract negative name to the country. Research has shown that though prequalification system has been in place, the system has not been automated as to have a backup knowledge of existing contractor before time. Contractor prequalification is an information gathering and assessment process that determines a contractor's capability, capacity, resources, management processes, and performance. The existing prequalification system only exists when there is available project and had always been manipulated because it is not automated. Based on the challenges faced due to non-existing automated system, this research has been put in place which harnesses these challenges by building an automated contractor prequalification system. The system has an updated record of all subscribed/registered contractors, the administers makes necessary routine survey to authenticate the information presented during the registration and updates. A simulated automated system of the contractor prequalification system was built using Java programming language and mysql wampserver as the database.