@Kyleigh Morgan Hello from a fellow Longmonster! We live in Longmont but are actually in unincorporated Boulder County, which is fairly strict about building and permitting. I highly recommend calling the county offices and talking with them about what you want to do and what they require permits for - establish that relationship now and also, hopefully, relieve some anxiety. Many permits can be applied for online and my experience with inspections has (so far) been painless. The scheduling can be annoying, but hire good contractors (or do good work yourself), and the inspections should be smooth.
Boulder County has a lot of permitting information online that you can educate with, and you can apply for permits online here:
https://www.bouldercounty.org/property-and-land/land-use/building/ezbp-building-permits/
Personally, I find getting permits worth any extra hassle since it's a check on the work done and it makes selling easier. I hope this helps!