The goal of this handbook is to enable those who plan structures for undergraduate science communities to see the process as evolutionary and organic, a process integrally related to ongoing efforts to provide a quality learning experience for the students on the campus. The handbook presents many of the questions that need to be addressed as planning proceeds, and suggests some possible answers to these questions from those with recent experience with facilities projects. The architectural case studies presented throughout include further ideas about how individual institutions have answered questions about purpose and design in ways fitting for their community. Chapters include: (1) "Focusing on Curriculum"; (2) "Focusing on the Campus"; (3) "Leadership and Community"; (4) "The Planners"; (5) "Phases of Planning"; (6) "Technical Issues"; (7) "Spaces That Work"; (8) "The Project Budget"; (9) "Operating Budgets"; and (10) "Fund-Raising." (JRH)