This volume of the Young Cities Research Paper series examines the interdependency between the energy efficiency of buildings, the quality of construction, and the level of workmanship. The results are based on multiple case studies at construction sites in the Tehran-Karaj region, the work of experts, interviews with Hashtgerd residents, and analyses of Iranian earthquake studies. The research activities took place from 2009 to 2012. The main part of this book consists of a classification of damage cases in concrete work, energy efficient construction, welding, site arrangement and installation work. These fields were identified as the most important ones. The book has been conceived as a combination academic study and manual to evaluate the quality of workmanship and results at construction sites. It is not intended to substitute technical books, but rather to identify problematic situations, clarify possible subsequent damages and reconstruction options, and to concisely describe proper execution.