Flooding is an unpleasant situation, which has affected the lives of people, animals, and natural endowments. It could cause so many negative things, which among them are encroaching the area meant for farmlands, erosion that may lead to earthquake, inability to access good water, and sometimes affect land quality.This research work was aimed at investigating the general strategies for preventive maintenance against flooding in a built environment. The objectives were to identify and rank the various types of flood in a built environment and their related causes to know the various effects of flooding in a built environment. The study adopted a structured questionnaire survey. Respondents were selected using purposive and random sampling technique. The size of the study was 100 respondents made up of five professionals in building construction. Relative Importance Index (RII) was used to analyze both the causes and effects of flooding. The study revealed that flooding is caused by rain, river overflowing, dam breakage, blockage of public drain channels, ice and snow-melt, deforestation, development, poverty among others. It was found out that the effects of flooding are more pronounced on people, animals, environment, and economy among, other things. The study recommended that dumping of refuge at the drainage areas must be avoided, regular inspection, and clearing of drainage system should be embraced among other things. Keywords:Strategies, Preventive Maintenance, Flooding, Built Environment