Also note that some of the PWPs need to have certain number of clear spaces in front of them.
i.e. If you build a police station, the size of the station is 3x3, the buffer zone on the side and the back is 1, but it needs to have 5 clear spaces in front of the police station
PWPs like the streetlights, standees, which are 1x1 in dimension, need to have 2 clear spaces in front of it; flower beds, which are 2x2 in dimension, need to have 3 clear spaces in front of it