In each case where an application for a permit to build has been made, the applicant shall immediately cause a notice to be posted on the premises to be built upon, stating that a permit has been applied for and that plans and specifications are on file and may be inspected at the Municipal Hall. No permit shall be issued unless and until the notice shall have been conspicuously posted on the premises to be built upon for five consecutive days after the filing of the application for permit and no constructing of any kind for which a permit has been requested shall be commenced until the permit has been issued therefor.