Suitable housing is essential for older adults at risk of deteriorating health, yet housing decision support is often lacking. A 5-day co-design sprint was conducted to develop digital prototypes supporting informed housing decisions. Key stakeholders including older adults, healthcare professionals, and technology- and architecture professionals participated. Notes from observations and textual content of the prototypes were thematically analyzed. Four prototypes were created and summarized in the themes: tailored to individual needs and preferences, comprehensive palette of choices, multifaceted information accessibility, and connections to the outer social world. The findings contribute to further development of evidence-based decision support related to housing.