Then you're able to put in a city or zip code and then a radius that you'd like to search within.Hopefully this helps!

Much is going to depend on the amount of the house that will be used and allocated strictly for business. 

This can include opening some walls here and there so the inspector can check if everything is built to code, then you repair or tear down depending on what they find. 

or does the shortage of houses in that zip code determine the prices going up?.

I do think that the B or better zip codes area a great place to start.

Focus on renovations that prioritize safety, functionality, and compliance with building codes.

depends on who you ask.Going back to the point and restating a previous comment - YOU NEED TO CALL THE LOCAL CODE ENFORCEMENT/BUILDING OFFICE!!!

I get the bathroom it should have an exhaust fan.OK im in Calififormia while older buildings pror to 1985 may not building codes now requre cooktop ventilation. https://up.codes/viewer/califo... 

Or is it a code violation?

A quick look at comps shows that tenant-occupied properties are selling at 65-110k while some sold to owner occupants are selling at up to 200k in this zip code.