a little more info would help (exp) ep's and sp's installed is it happing in the hood or sub hood like uni or ofb
if in uni is it a dorm if it is not all building tools are available and you will have to use cheats: Enables all building mode tools boolprop dormspecifictoolsdisabled false: Disables some building mode tools boolprop dormspecifictoolsdisabled true
and if it is an apartment you can change from apartmentbase to residential do your building then change back by useing changeLotZoning residential and changeLotZoning apartmentbase