Where a building permit has been issued, the construction official may allow a nonconforming use incidental to construction projects on the same premises; such as storage of building supplies and machinery, and/or the assembly of building materials, the placement of storage buildings and temporary office structures. Where such uses have been allowed by the construction official, permits, pursuant to subsection 13-25.6 shall be issued and shall expire at the completion of the construction project or within one year, whichever occurs first.