Considering only two dimensions (cost and time) among different dimensions that have been defined for evaluation success of rehabilitation and renovation process in urban decay contexts, and with attention to the special condition of Iran, the current trend is clearly inappropriate. In this regard, this study, considering the important role of suitable housing and urban space in the welfare of the citizenry, aims to facilitate and amend this process by evaluating strategies to encourage non-government sector in order to comprehensive participation in the mentioned process. For this purpose, using Descriptive-Analytical methodology, the research hypotheses were evaluated from the perspective of descriptive and illative statistics. The results showed this reality that despite neglect to indirect encourage instrument (Non-Grant Base Instrument) in order to encourage investors to investment in rehabilitation and renovation process, these instruments can be useful similar to direct encourage instruments that mainly have a financial base. Also test results of the second hypothesis showed a correlation between desire to investment in decay urban contexts and use of industrial construction methods in these contexts; this can provide suitable opportunity for decision makers in order to encourage use of industrial construction methods, because they have different kinds of benefits that inherently increase tendency of both the investor and citizenry to investment in urban decay contexts.