I get calls from customers that dont like there bathroom fans running 24/7

I dont do new construction so I am not aware of what the norm is for these .

I know they can be interlocked with the furnace fan
or just hooked up to a lighting circuit and no switch
or a timer installed in the bathroom where the fan must run 8 hours in a 24 hour period.

would spec homes just be hooked into a live circuit and left running 24/7?

customers calls to complain and I have to tell them that we just cant have a switch installed as it isn't compliant with the building code.

Why do people repluse when i mention I need a permit to alter anywiring in a home.

then they call some handyman from the newspaper or were ever.