Alviso is under sea level and the building codes now require that all new buildings have elevated 1st floors, so I am sure they are in a flood zone. 

I stick to two zip codes - that is it.

@Patti Robertson The seller gave me a list of repairs that were supposed to be up to code for section 8.

And it was a volume play. so in conclusion  if you want to go investor route in my mind you have to be totally selective. and anyone asking for investor friendly agent is code for probably going to waste your time.

Install key code locks.

The references by @Eddie Memphis would be true but the building code adopted by the City determines what requires a permit and I have been told the above is true for drywall. 

The goal for the SFR is to build another unit in the back (15,000 sq ft lot), which is permitted, according to local code.

I have put in my zip codes and additional requirements such as equity percentage and owners age. 

You should figure out what your Niche and Strategy would be first.The Best Beginner’s Real Estate Investing Course OnlineModule 3 explains Niches and Strategies.I will be Flipping Single Family Houses (to make Cash) and reinvesting that cash in additional flips and also Buy and Hold Single Family Houses and Small Multi Families up to 4-plex for long term.I have not narrowed down my Area (Zip Code) yet.You could also House Hack your first Property while LearningHere is another post similar to yours:https://www.biggerpockets.com/forums/12/topics/413684-i-pondering-what-to-do-next-want-to-make-a-good-investmenthttps://www.biggerpockets.com/forums/12/topics/413149-what-direction-should-this-newcomer-go

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