The lot or tract where any building is to be constructed is part of a plat of record, properly approved by the City of Sachse, and filed in the plat records of the county;

The plot, tract, or lot faces upon a dedicated street and was separately owned prior to the effective date of the ordinance from which this chapter is derived, or prior to annexation of the property into the city, whichever is applicable; however, only one building permit for a single main building conforming to all the requirements of this chapter may be issued on each such original separately owned parcel unless either subsection (1) of this section is complied with; or

A permit for the construction of a non-residential building or buildings upon any tract or plot may be issued if a building site, building tract or building lot has been reflected on an approved plat. A certificate of occupancy shall not be issued until a final plat has been filed for record with the county clerk and all other applicable regulations have been appropriately satisfied.