International Journal of Natural Resource Ecology and Management, 2017; 2 (1): 9-19Open spaces in cities like Dar es Salaam are facing problem of encroachment and conversion. Despite scholars’ recommendation on participatory approach in designing and execution of communities’ project to increase participation including Conservation of Open Spaces (COSP). The study used questionnaire survey and participatory approach tools to gather information. Results show that majority of the respondents are aware of specific types and functions of existing open spaces in the study area. In general, most respondents were willing to participate in COSP. Quality, benefits, education and duration of residence were factors positively influencing households’ willingness to participate in COSP.