The study was on the effects of project management practices on implementation of housing development projects in Kenya. The study used descriptive research design. The target population in this research were 241 employees in 15 selected registered property developers in Mombasa County. Stratified sampling technique was used to select a sample size of 149 respondents. Primary data was collected by use of self-administered structured questionnaires. The secondary data collected was used to cross validate the primary data results. The collected data was analyzed quantitatively and qualitatively. Descriptive and inferential statistics was done using Statistical Package for Social Sciences (SPSS) version 24 and specifically multiple regression model was used for hypotheses testing. The study findings established that three objective namely project team competency, project planning and project stakeholders' management had a positive correlation with implementation of housing development projects in Kenya. However, the independent variable project cost management had no correlation with the dependent variable. On regression analysis results rejected null hypotheses for project team competency, project planning and project stakeholders' management but accepted the null hypothesis for project cost management . The study conluded that project team competency, project planning and project stakeholders' management have a significant effect on implementation of housing development projects in Kenya and further concluded that project cost management has no significant effect on implementation of housing development projects in Kenya. The study recommended that staff working in a projects needs to be trained before projects commences; that projects should hire project managers that have project academic and practical experience; that projects are financed after proper evaluation of projects viability by quantity surveyors', that project managers should adopt the use of innovation and technology in their project planning process that would be accurate and that project stakeholders' should be involved in all milestones of the projects to enrich the project in cases of variances in costing.