Competing forces in urbanization avert cultural heritage, resulting in loss of assets, disparate development and severe consequences for the poor. Lack of awareness to the value of Cultural Heritage and its conservation among politicians, planners, concerns of stakeholders prevents heritage conservation as an integral part of planning and development. On a premise that conservation is a tool for integrated urban development, the research project examined - through an identified case study: the Historic City of Nablus, Palestine - how cultural heritage and its conservation contribute into the city growth and development, poverty alleviation, improvement of living conditions and promotion of the Historic City image and attractiveness. Site visits and field observations, key informants interviews and analysis of documents and maps were a threefold method that was used in the case study analyses. Results obtained from this study showed that there is lack of integrated conservation into urban planning and development. This lack of conservation starts from institutional set-ups and organization and ends by projects implementations and operational processes. Thus, the study has contributed into the existing conservation policy as acknowledgments at three different levels: policy; institution; and design level. A slow-steps concept has been proposed to frame the correlation between these three different levels of influence. This concept interpreted by the end of the study discussion into strategic priorities and framework for action in the Historic City. Along with, an urgent need for institutional reform and capacity building based decentralization approach and cross-sectoral correlation. Civic engagement and public private partnerships in the conservation practices were also proposed as two main variables in approaching sustainable urban development. Conclusions from this study have been formulated into a form of recommendations to the local authorities, municipalities and local community representatives.