Where can I get code violations for St. 

I then called the customer and told them their agent needs an education , of course the deck isnt up to todays code , code changes every year . 

My local code enforcement officer is happy to take calls. 

It sounds like you have an un-permitted unit, which is essentially always a risk since there has been no notice to the AHJ that it exists and they can therefore initiate a code case to have it removed in most cases.

I also did a local renovation in 2022 bringing it up code.

My question is why you want to bring it up to code, other than just to feel good or improve your exit strategy?

I'd argue that there are very select zip codes where this strategy works.

Then add any other codes required where you want to build and study those as well.

Quote from @Jemini Leckie: Hello, I am trying to understand the Orem, city code to determine if I am allowed to rent my basement ADU that I currently live in two a couple cousins and their friend.

I was thinking of starting a rent increase for my 1 bedroom tenant voucher due it being low and well under fair market value(Based on  hud and zip code) but my tenant is in the process of having a caretaker for her disability and getting approved for a two bedroom voucher.