<font color=blue>I will be starting a barn/workshop project this spring and I've been wondering...to permit or not to permit?</font color=blue>
It depends upon the type of building, where you are located, what the municipal building regulations require, what you intend to use the building for, etc. I've seen and heard of small barns going up in my community without any building permit and the homeowner is OK. Municipality doesn't care. If, however, the barn is fairly large, will be used to shelter animals, used for numerous ancillary purposes, etc, then it may matter. Cardinal rule is if in doubt do definitely check with the local building dept, building inspector, or code enforcement officer.
....Bob