then what zip code ?

@Spencer Herrick like most of the folks said here, it's about your team and being sure you have a solid due diligence process in place...no need to see a property in person if the property meets all the criteria on your due diligence checklist...the first 35 checklist items are crossed off in the first 3-days of due diligence...One thing you have to remember is almost every existing and new structure in the country was built by a professional developer that met strict requirements set by building codes...properties can have issues, but almost anything can be fixed...overall SFR and MF homes are incredibly durable.

I don’t know a your specific codes but if wetlands are present on the property, there are setbacks and other rules to follow which could make some lots lose their value.

There are definitely good and bad pockets so you need to be aware of where you're buying and not focus strictly on the low prices.

I somewhat agree with and earlier post.Mild enforcement and have all comply with code regulations and licensing.That is a fair game and we all need rules to be able to play.Best C

Is the city doing one area at a time and making sure everything is up to code proactively? 

If it is one lot/parcel and zoned for two units, meets health and safety codes should be good.  

This should be in the written report.....some guys color-code the problem items.

@Nicolas Whitman the cash buyer list from Propstream has been pretty good for me; I can give some cheat codes when it comes to working that list. 

You could do layers to color code different priorities. i also delete or change color of the property marker once I have seen it.