Lafayette County - Frequently Asked Questions How do I obtain a building permit? Contact the Lafayette County Planning office @ 660.259.4439.   How do I register to vote in Lafayette County? Contact the Lafayette County Clerk @ 660.259.4315 or email County Clerk, Linda Niendick at  niendick@lafayettecountymo.com .  You can also view our voter information by clicking on the VOTER INFORMATION link.