People spend the vast majority of their time inside built settings, so it is not surprising that these spaces can have a meaningful impact on people’s well-being. As a psychology researcher, I investigate this dynamic: how the fit between particular people and particular places impacts thought, emotion, and behavior. For example, I study how undergraduate students vary in their use of on-campus housing, how religious beliefs guide practitioners’ experiences within worship spaces, and how people differ in terms of the way they use and what they look for in a home. Identifying and understanding the factors most relevant to person-environment fit is an essential step in being able to effectively build, design, and market places for the people who will use them.