The purpose of this phase is to define and illustrate the project in detail. While the conceptual design is based on generalities, design development gets down to a host of specifics. Each element of a project is explored in depth while being integrated into the whole through more detailed plans, building sections, exterior elevations, and perspective sketches.
At this point, it is advisable to determine construction budgets with builder candidates. Also, any regulatory issues or processes should be addressed and in the process of resolution.
At the end of this phase, there is a set of architectural drawings that thoroughly illustrate the scope, quality, and complexity of the project - three of the four elements that determine project cost. Before starting the next phase, the design of the project should be complete and realistic budget objectives should be in place.