ID concept includes: Mood Board, Space planing ( Plan ) measurement & details drawing, sectional drawings,
                              Elevation Drawings, Proposed material , 3D drawings ( about 6pcs)

Interior design is as important as architect, especially if you are having a major renovation that includes hacking, M&E and etc. An experienced ID person will charge RM5 -RM8 per sq ft. Of the built up property. My friend charges RM10-RM15 per sq ft because of establishment and previous project. But I heard that at home deco fair , someone quoted 2K for a 2000 sq ft. End terrace house. I have my doubt on that pricing, may is just a plan and a few 3D drawings. But hey is a personal choice.