My experience (which is slim) is that older buildings that don't meet new code standards are often grandfathered in. 

@Koleton DaleyIf you would read the posts versus trying to slander me at every turn, you would notice that the comments you copied and pasted from an earlier statement of mine were from the 38127 zip code.

Check your state's property code and an attorney in your jurisdiction.

You can call code enforcement.

A more modern option might be if you pay for a modern lock that allows him to issue a code for a limited time if you need access.

. :( - JG.https://orangecounty.craigslist.org/reo/d/midway-city-double-wide-foreclosure/7090884174.html#https://orangecounty.craigslist.org/reo/d/westminster-mobile-home-for-sale/7072697588.html

In commercial zoning code for full service restaurant for example in los angeles/glendale ca ,and possibly other areas, it says new construction requires 10 parking spots per 1000sf .

You take on the risk of any law or code violations, injured parties, etc.Why let someone else make money with your property?

After a google search I was unable to find the law about how many unrelated people can live in one house legally.Specifically I was wondering about the laws in Atlantic beach (zip code 32233).

Code enforcement, appraisals, home inspectors?