Yeah, the electrified rail of construction talk is to wave off a permit. Sorry, I spoke truth where the regulations do not encourage truth. Truth is a competent craftsman/homeowner can do a lot of stuff that does not necessitate permits, fees or long delays waiting for inspectors. That "truth" is at the heart of the DIY mentality.
In some jurisdictions, a permit is required to change out a light switch (like for like). Really. Same goes for GFCI's. Same goes for a lot of common repairs.
I bow to those who say "always get a permit." They are citing code. However, since we know how to do these tasks on our own homes, we also know those permits are hardly ever obtained.
Let the hate begin .....