For example, if you are pulling data for pre-foreclosures then directly web scraping the county foreclosure website will be as up-to-date as you can get.You can use sites like Browse AI to set up a scraper without code and have data written to a spreadsheet.

Why do so many flippers do code illegal, unpermitted work?

I'm just naming random locations because there's literally about 100 zip codes to choose from.

However, there are tax code changes every year.

19146 area code includes Grays Ferry and Point Breeze.

Due to high crime property should be picked block by block, and not by zip code.

Cant remember what he put on the windows but windows were minimum code U do need central air in most of MS to qualify for section 8. 

So examine per zip code based on geographical location.

Since the basement would be used more so for us living in the unit and not rental income, do the same code/zoning requirements apply?

Bigger Pockets has some great resources for finding investment properties beyond Zillow, like searching by zip code or filtering by certain criteria.