As used in this chapter, the following terms shall have the meanings indicated:
Any enlargement of any building, or any work of repair, rearrangement, removal or replacement of any interior or exterior wall, roof, floor or support, or of any part thereof, of any building; provided, however, that the following shall not be deemed to be an alteration and may be done and made without first obtaining a permit therefor, as hereinafter provided: the painting of any building or part thereof; the alteration of any building, including labor and material, aggregating $1,000 or less in value annually; and the normal, regular repairs to any building, including labor and materials, aggregating $1,000 or less in value annually.
Any natural person or persons, association, partnership, firm or corporation.