Section 64-613 - Special height regulations for buildings with non-conforming uses
The maximum height of such altered, enlarged , relocated or reconstructed building with non-conforming uses , shall not exceed the maximum height permitted by the applicable district regulations, except that for non-conforming residences in C8 Districts or Manufacturing Districts , the maximum height of such altered, enlarged , relocated or reconstructed building , shall comply with one of the following options:
(a) for single or two-family residences , a horizontal plane equivalent to a height of 35 feet, and for buildings other than single- or two-family residences , the applicable sky exposure plane for the district; or
(b) for all residences a horizontal plane equivalent to the pre-existing height of such building , as measured from the top of the lowest usable floor , to the highest point of such pre-existing building , as measured from the reference plane .