Mid-Century ranch house architecture and design is significant to the architectural landscape of the Phoenix Metropolitan Area. The increasing age of the city's post-WWII properties is creating a need for renovation and rehabilitation, and new technologies have created modern conveniences for today's homeowners, changing interior space plan requirements. These homeowners will need guidance to alter these properties correctly and to preserve the home's essential features. This thesis analyzes the design trends and materials used during the mid-twentieth century, and demonstrates methods for applying them to a current renovation project. The research outlined in this document proves that it is possible to maintain historic integrity, include "Green" design strategies, and apply contemporary technology to a modern ranch renovation.