To construct unit b ( apn 117120s00200co) of a hpr family residence : 31 sq ft, 576 sq ft garage and sq ft of porches & decks. Minimum ft side setback, 25 ft min setback from granny white pike and 5 minimum rear setback for hpr. House faces granny white pike, woodmont blvd unit a, faces woodmont..... Woodmont blvd is street used for setback determinations.... Maximum height of 45 feet total height from grade. Need to comply with bl2014-7 which reads: the height of two detached dwelling units on a single lot cannot exceed a ratio of 1 horizontal to 1. 5 vertical for each structure. Maximum height shall be measured from the natural grade. The natural grade shall be determined based on the average elevation of most exterior corners of the front facade, to the roof line. Natural grade is the base ground elevation prior to grading.