A technique for constraint management and validation for template-based device designs is disclosed. The technique includes generating a template-level representation of an electronic device design based on a transistor-level representation of the electronic device design. The template-level representation includes one or more hierarchies of templates. Each template represents a corresponding portion of the electronic device design. The technique further includes determining constraint declarations associated with the electronic device design and verifying whether there is a functional equivalence between the template-level representation to a register-transfer-level (RTL) representation of the electronic device design. The technique additionally includes verifying whether the constraint declarations are valid and verifying the electronic device design responsive to verifying the functional equivalence and verifying the constraint declarations.