The ‘practice of residential design’ consists of rendering services embracing the scientific, esthetic or orderly coordination of processes which enter into:

1.  The production of a completed:

(a) Single-family dwelling unit; or

(b) Multifamily dwelling structure that does not exceed two stories in height and is composed of not more than four units in that structure; and

2.  The use of space within and surrounding the unit or structure, performed through the medium of plans, specifications, administration of construction, preliminary studies, consultations, evaluations, investigations, contract documents, and advice and direction.