Tehran has experienced significant physical changes in recent years through various development and redevelopment projects. Navab project which started in 1994 has been one of the largest urban renovations in modern urban planning in Iran. Choice experiment method (CEM) has been used to assess some of the hidden and unaccounted social and environmental costs of this project. The results show that people were willing to pay significantly higher prices for houses that would provide them with cleaner, safer and more secure as well as more social networking opportunities as compared to the houses that were built as part of the redevelopment project. پرونده مقاله