This study offers a preliminary understanding of transformation process which has taken place within the City of Dar es Salaam, Tanzania focusing on Kariakoo area. The paper discusses intensively the process, typologies and impacts of the transformation by identifying both formal and informal factors of transformation. The study clarifies the process of transformation by analyzing chronological changes in blocks from the year 1920 to 2006. Based on the analysis, it was observed that since most of transformation process took place informally, some spaces' meanings and architectural values have disappeared as well as introduction of new meanings and uses of spaces within the transformed area. Effective use of spaces between buildings as well as the newly introduced underground level and upper level commercial spaces in Kariakoo was observed in this study. Based on the findings, the study acknowledges the role of informal sectors to transform the area and to create new and effective ways to utilize urban spaces. However, the study suggests establishing planning regulations based on monitoring the transformation process.
