Shops, sheds and secondary garages can have many of the same features of a house. It is especially common that those features were installed incorrectly or outside of applicable code. Although a home inspection is not a code inspection, inspecting these structures can provide useful information and sometimes uncover unsafe conditions.
Tabor Northwest charges $75 per extra outbuilding as a part of a full home inspection. All home inspections include one detached garage if not already a part of the home. ADU pricing differs, call for details.