It shall be unlawful to construct, enlarge, alter, remove, or demolish a building, or change the occupancy of a building from one use group as defined in this code to another; or to install or alter any equipment for which provision is made or the installation of which is regulated by this code, without first filing an application with the building official in writing and obtaining the required permit therefor; except that ordinary repairs as defined in § 23-27.3-102.0 which do not involve any violation of this code shall be exempt from this provision.