Some cities can be very different a block or two away but share a school district.

They are the "best house on a bad block." 

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For example one big row of 15 units isn't optimal but if I want to break them up I would have to have 20' between blocks, which would kill yield.Instead of waiting for them to modernize their multi-family regs (at least a year out, maybe two) or sucking it up and living with the costs as things stand, I could instead do 5 "triplexes" of single-family + 2 ADUs and bypass some restrictions (only 5' setbacks between blocks, 1 parking space per ADU unit instead of 1.75, etc.).But I'm concerned that Seattle builders may quickly move away from this strategy as HB1110 will (in Seattle and many other larger cities/counties, but not mine) soon enable sixplex townhouses in pretty much all the areas where the condo-ized ADU strategy has been mushrooming. 

Akron, like most cities, can change from block to block so parts of some zip codes are no goes for me.

Pay no attention to the keyboard warriors that took a course from a guru that's really not been around the block.

Also, in some markets, market demand changes from block to block. 

@Corey ThompsonThe last thing I saw before he blocked me from his social media profiles was he was going to be in Orlando this week at podcast movement festival.

I associate it with 1,000 sf houses on blocks with no garages and an illegal trailer dropped in the backyard.

Like Detroit, Saint Louis is incredibly "block by block" where one area is experiencing gentrification or at least just a stable middle class feel and that might only be 100 yards away from a street that will be un rentable, un managemeable, and honestly a bad place to get out of your car.