Many years ago, I called the city to ask if I needed a permit to build a fence. They said yes and gave me the requirements, height/placement/location, etc.
I asked if I really needed to place my permit in the front window. I was told ABSOLUTELY, otherwise we will get calls from ALL your neighbors.
Not in my neighborhood, also in Maryland.
My neighbor is re-doing his entire house. Ripped out all the drywall, fixing the completely jacked up electrical system and replacing all the insulation. I don’t see a building permit and really don’t care.