To construct a single family residence with 1726 sf living area, 4 sf attached garage and 75 sf porch areas. Ar2a zoning. Min front s b; min. Side and rear s b.... Size at 39 x 34 .. Max ht at 2 stories and 34...... 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 very top of the structure.. Natural grade is the base ground elevation prior to grading. And definition of . Story means a portion of a building between the surface of any floor and the surface of the floor above it, or, if there is no floor above it, the space between such floor and the ceiling above it. A basement or cellar shall not be deemed a story if the finished floor level directly above is not more than six feet above th