To construct a new single family at 12 sqft with porches and decks... This is one of two single family houses on this property... See plan. This 2nd single family house is locate behind the existing front single family house... Min 6 between houses... Rear min 20... Sides min 5... Width at 28.. Ht at 2 stories and 25... 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 sh