If you are considering doing any sort of home remodeling, I strongly recommend checking with your municipality to see if you need a permit, or if a permit is not necessary!
Why? Because when you go to sell your home, you have to disclose if you did any sort of remodeling and whether a permit was required. If a permit was required and you did not obtain one, you have to disclose that you did not.
If you got a permit and the work was inspected and signed off when it was done, great!
FYI, make sure you follow-up to ensure the project has been signed off as "complete" on your municipality record.
If you did not get a permit, how may your home now by perceived by a potential buyer?
Link to city of Minneapolis permit overview. http://www.ci.minneapolis.mn.us/mdr/permits/
Link to city of Minneapolis permit overview. http://www.ci.minneapolis.mn.us/mdr/permits/