2 houses in one building 150m2 and 200m2 on a land of 800m2

Land 800m2
2 houses, 1st one 200m2 and 2nd one is 150m2
The land is on a street from one side with 24m long, empty space shall be 4m from front, side sides, and 6m from the backside
The land has a slope of around 2m from the highest point to the lowest point at street side, a parking for 4 cars shall be at the basement level(each car has to have 5x3 space)

House1, shall have 3 bed rooms (one shall be master with a bathroom) and the other 2 rooms with a shared bathroom, a kitchen, living room, and big guest room and a dinning room, a small bathroom for guests and a washing machine room (which can be used a storage room as well)
2nd house, shall have 3 bedrooms  (one shall be master with a bathroom),  and the other 2 rooms with a shared bathroom, a kitchen, living room, and  guest room, a small bathroom for guests
Each house shall have a separate entrance
The building shall have shared entrance with an elevator space within