@Carolyn Guertin investing in Detroit should be done on a block-by-block basis.That's actually difficult to do, so we ranked 104 of Detroit's Neighborhoods on our site as Class A, B, C or D to help investors make better decisions and NOT get ripped off.NEVER try to invest in Detroit using zip codes!

The way to mitigate this risk is by getting a permit to legalize the unit(which may be a bit more difficult) or duplex the unit with digging down the basement to be in compliance with zoning and building codes. 

See if they have access to Data Axle - a database that includes businesses in the USA.Figure out the SIC or NAICS code for that business and run a search. 

There's a variety of ways to get a deal in front of you (I'm mostly a flipper), but basically if it looks promising, I run custom comps queries and check the current & past $/sf of renovated/distressed product in that city or zipcode.Here's a chart on 90066 I generated from my tool under Market Stats > Sales Data > Specific Zip Code:- My above chart (more available) shows the Avg Renovated $/sf (High) over time in this Zip Code, something completely different than charts/providers based on Averages/Medians only, like every other platform (RedFin Below, https://www.redfin.com/news/data-center/):- Can't select smaller locations such as City or Zipcode for their $/sf data, so it's useless helping me underwrite/verify a deal.- Can set Zip Code for Median Sale Price data, but again it's the median/avg so it's useless helping me underwrite/verify a deal.Then if that looks decent, I'll run Sales Comps, and get a quick summary of some key metrics based on those comps.

One thing you have done right is to create a strict metric for what a good deal loaoks like.

Google needs a physical building to designate as your "business" They will send you a letter or something to your airbnb address and then it will come with a code.

Thanks for the shout out @Michele Fischer I agree OR laws are more strict than WA, but I'm afraid WA is trying its hardest to become as bad lol...

The lot will have to be zoned for multi-family and the structure will have to meet code. 

This can lead to non-compliance with building codes, resulting in future legal and financial problems for the buyer.4.

When we were there in May they dryer was all of sudden not heating, we called LG and they talked us through how to find the error code, gave them the code and it gave them an idea of what was wrong.