"Contractor" as used in this Chapter, means any individual, firm, co-partnership, corporation, association or other organization, or any combination of any thereof, who or which by himself or itself, or by or through others, constructs, alters, repairs, adds to, subtracts from, reconstructs, remodels or performs any service on any buildings, structure or appurtenance thereto, or who or which undertakes or offers to undertake, or purports to have the capacity to undertake, or submits a bid so to do. The term "contractor" includes subcontractor and specialty contractor, whose operations as such are the performance of construction work requiring special skill and whose principal contracting business involves the use of specialized building trades or crafts. (Ord. 154-04. Passed 11-8-04.)