Single- and two-family residences existing on October 28, 2012, may be vertically elevated, or reconstructed to a higher elevation,

in order to raise the lowest horizontal structural member supporting the lowest floor containing habitable space, located at or above the adjoining grade as of October 28, 2012, to flood-resistant construction elevation, and in so doing may create a non-compliance as to height and setback to the extent that such lowest horizontal structural member is elevated or reconstructed to flood-resistant construction elevation.

This Section shall not preclude the construction of complying enlargements or other complying structures on the zoning lot.  

Buildings that were complying on October 28, 2012, and vertically elevated or reconstructed to a higher elevation, pursuant to this Section, shall be considered legal non-complying buildings.