At the back of my property , near a block wall giving on an alley, I
had some pittosporum put in, oh maybe 6-7 years ago? They have grown
very , very tall - maybe over 20 feet -- practically reaching the
phone/elec lines. Will this plant l take judicious topping, so it
will become bushier -- more of a privacy screen -- instead of tall &
skinny?

The landscaper's chart reads "pittosporum crassifolia", but when I
looked it up, it said only 8-10 ft. tall, but this is much more, so I
am somewhat confused.

In front of the pittosporum (away from brick wall, toward house)
there is Erica, which has also grown much taller than it's "supposed"
to. ??

This is So. Calif coastal.

TIA

Persephone