This practice article advances an ethical imperative for guiding collaborative approaches to evaluation with low incidence and underserved communities. We describe our evaluation processes for building transformative partnerships during a DeafBlind Support Services pilot program evaluation in Western Canada using collaborative approaches to evaluation. This program was designed to enable adults living with dual sensory loss to experience self-determined activities in the community that enhance resilience and belonging. Key features involve specialised Support Service Providers who assist DeafBlind community members with accessing and participating in essential community services and social, vocational, educational, and recreational activities. In presenting our co-generated evaluation insights, we advance an ethical imperative describing philosophical foundations, pragmatic actions, and political leadership for implementation of collaborative approaches to evaluation with a low incidence and underserved community.