The words "modification" and "addition" include, but are not
limited to, any alteration, addition, modification, structural repair,
rebuilding or replacement of any such existing use, structure or accessory
structure or use. Ordinary maintenance repairs are not considered
an extension, modification or addition; these include painting, decorating,
paneling and the replacement of doors, windows and other nonstructural
components and the maintenance, repair or replacement of existing
private sewage or water supply systems or connections to public utilities.
Ordinary maintenance repairs do not include any costs associated with
the repair of a damaged structure.