There shall also be filed a plot plan showing to scale the size and location of all the new construction and all existing structures on the site, distances from lot lines and established street grades; and it shall be drawn in accordance with an accurate boundary-line survey. In the case of demolition, the plot plan shall show all construction to be demolished and the location and size of all existing buildings and constructions that
are to remain on the site or plot. The building official may waive the requirements of this section when the work involved is of a minor nature.

SOURCE: GC § 31023.