The chapter analyzes the relationship between building techniques and urbanization processes in Pre-Roman Pompeii, revealing the correlation between social status and the ability and drive to innovate in the field of domestic architecture, and reconstructing the pace at which the technology was extended to public building. The evidence from Capua and Cumae, two major urban sites that were incorporated under a Roman praefectura just after the Second Punic War, provides important parallels to contextualize the Pompeian pattern within the regional phenomenon and to measure the impact (or lack thereof) of direct Roman political influence.