Any occupation which is customarily, in whole or in part, conducted in a residence may be conducted in any dwelling unit provided all of the following criteria are met:

A. The use for the occupation must be clearly incidental to the use of the dwelling as a residence.

B. Only one person other than a member of the immediate family residing in the dwelling unit shall be employed.

C. The total area devoted to such use shall not exceed twenty-five percent of the area of one floor of the dwelling.

D. No structure or anything exterior to any structure shall indicate that it is being used for any non-residential purpose, except a sign as provided for in Section 17.52.060.

Examples of home occupation are physicians’, dentists’ or attorneys’ offices; dressmaking and tailoring shops; the teaching of a musical instrument to one student at a time; beauty and barber shops; real estate offices and insurance offices. (Zoning ordinance dated 6/3/03 § 12-2.0)