The museum field currently and historically has centered on the needs of White, educated, privileged, and affluent people, and changing that reality requires new ways of conceptualizing, organizing, and assessing our core practices. Practice‐based models—including specific stories of how museums and communities work together—are still needed in our field, both as guidance for structuring future projects and as inspiration for what is possible. We share a case study of a 10‐year makerspace design process and identify key features for sustaining community–museum relationships over an extended period of work, which we call community‐informed design. We describe five key aspects that promote sustainability in terms of community–museum relationships and the creation of high‐quality experiences: naming values and assumptions, emergent planning, flexible and distributed staffing, organization‐to‐organization relationships, and layered data.