When doing an interior kitchen or bathroom remodel, a building permit may be needed if you are affecting drywall, plumbing or electrical components.
Here is the reason why, per the Washoe County Building Department’s website –
“The purpose of a building permit is to control the quality of construction to help insure that Washoe County continues to be a safe, beautiful area in which we all can live, work and play. Also, the evidence of a building permit is often necessary to obtain financing from a lending agency and may be required to close a sale of your property to show that any improvements that have been made are in compliance. Fire and liability insurance damage may also not be paid in some cases where improvements have been made without a permit.” – http://www.washoecounty.us/building/facts.html