Thinking of scraping the existing duplex off and building new. I have elevation data on each of the four corners of the lot; the property slopes down slightly from the southwest to northeast, but the existing building pad (shared with the house next door south) is raised about 6' high from the south front sidewalk line (southeast), about 7' on the north front sidewalk line (northeast) (Google street view shown).
Coincidentally, the front left corner and back right corner elevation levels are identical, so I have three elevation lines, running diagonally inside (and outside) the terrain perimeter and put terrain breaks at both the sidewalk and alley lines. Without adding the existing square building pad elevation region the site plan is perfectly represented. But when I add the elevated region to match the actual elevated pad, a radical, steep drop off occurs on the right front, in front of the sidewalk, when in actuality the terrain simply slopes gradually to the sidewalk in the front and to the alley in the back . Any pointers on how I can fix the terrain so the slopes match reality? Lot lines are red dashed, setback lines are blue dashed.
Terrain_Nov_27_20.plan