Let me remind you guys vastu isn’t a thing which was designed for a single plot facing south. But it was for a full society, wherein every colony every city was supposed to be designed on vastu. (atleast they thought for the northern hemisphere…)
When it was said keep the north side open it didn’t meen that you will have a giant smoke producing factory in the north of the city .
The city planners have a code wherein rarely plots were cut in those odd facings…