Dear Dr Haider, well done for this important question, Actually, in my opinion, I think it depends on the Priorities and goals of your plan such as community participation or only commercial goals etc.
Dear Dr Haider Majid, I think we can achieve that by using Good documentation, financial and legal cover, and the most important understanding of the potential for the investment of tangible heritage.
Alberts, Heike C., and Mark R. Brinda. "Changing approaches to historic preservation in Quedlinburg, Germany." Urban Affairs Review 40, no. 3 (2005): 390-401.