Grounded normative theory focuses on enriching normative political theory arguments through recursive empirical engagement that strives for inclusiveness and accountability. It is increasingly influential but also has been critiqued as too broad to provide clear guidance. We argue that the approach, when understood as anchored in a complex conception of intellectual humility, can give crucial practical guidance, while also helping us to make sense of and evaluate ways of empirically informing normative theory. We demonstrate how different emphases on self-regarding and other-regarding intellectual humility guide research design, methods, and analysis in two main variants of grounded normative theory: theory testing and theory building. We show how specific normative-empirical projects can be situated and unpacked within the variants, and how each can give insights for project execution and assessment on empirical and normative criteria.