Duplex on a 30 ft wide lot: two 2-bed units, shared wall

I've drawn the duplex floor plan and saved it as plan.dxf, in feet and inches. I checked it once after the walls and once at the end. The end check only showed that all the parts were there. I didn't open the door swings up close, so the hinge side and swing direction of the hall doors are the first thing to check. - Lot: 30 x 90 ft, with the street on the south side. The building is 30 x 51 ft and stands 10 ft back from the street. - Grid: A, B and C run across the width (B is the shared middle wall). Lines 1 to 4 run front to back, on the back wall, behind the bedroom 2 wall, behind the kitchen and on the front wall. - Two mirrored 15 ft units, A and B. Each has, from the street back: - living room, about 207 sq ft - kitchen with counter, sink, stove, fridge and a table, open to the living room, about 135 sq ft - a hall along the middle wall - bathroom with shower, toilet and basin, about 79 sq ft - bedroom 2, about 98 sq ft - bedroom 1 across the back, with a closet and a sliding door to the patio, about 135 sq ft - walled back patio, about 161 sq ft, with a garden tree beyond it - Also on the drawing: front entry doors, windows, room tags with numbers and areas, a room schedule (total 1,630 sq ft), dimension chains, a floor level marker, a north arrow, the title and a legend. - Layers: - walls: A-WALL and A-WALL-PATT - doors and windows: A-DOOR and A-GLAZ - furniture, fixtures and plants: A-FURN, A-FLOR-FIXT and A-PLNT - grid: A-GRID - notes and symbols: A-ANNO-TEXT, A-ANNO-DIMS and A-ANNO-SYMB Assumptions I took: - Wall thicknesses: 0.15 m outside, 0.20 m for the shared middle wall, 0.12 m inside, and thin walls around the patios. - Building placement: the building runs the full lot width with no side setbacks, and there is a 10 ft front yard. - Room arrangement: the units are only 15 ft wide, so I put the two bedrooms one behind the other off a hall rather than side by side. - Windows: the side windows are on the outer walls, away from the shared wall.