Abstract This study examined the application of Management Information System by Estate Surveying and Valuation Firms in their professional practices. The study attempts to assess its effect on the staff performance with regards to their professional practices. The instrument used for data collection was self-administered questionnaires with a total of fifty-four (54) copies administered to registered Estate Surveying and Valuation firms based in Abuja metropolis which constitute 40% of 135 firms in the metropolis and the whole of the fifty-four copies administered were retrieved representing 100% response rate. The data analysis was achieved using simple descriptive statistics. Relative Importance Index (RII) was used to rank the impacts of the variables using a 5-point Likert scale. The study revealed that MIS to be a useful technological tool that can be used to access the necessary information required for decision making process. The study however showed that most Estate Surveying and Valuation firms were not enlightened about the inherent potentials of the MIS applications to the day-to-day running of Estate Surveying and Valuation firms. However, the major challenge militating against the usage of most of the information technology including MIS by some of the Estate firms has to do with lack of technical know-how. The study recommends the need by the ESV Firms to identifying the best type of MIS that best suit the operations of the various aspect of their professional practises such marketing, agency, property management, property development, record management, human resource management, financial or accounting aspect, etc. for efficient service delivery of activities.