That's for an 950 sf addition (new bathroom) and gut / remodel existing home of about 850sf, SF home, historic district in the City of Phoenix.  

If you know which district/court handles evictions it will be even faster.

Just watch the school district lines that makes a big difference in price in the area.

I can find it in SFR's in the lower rated school districts, otherwise it's tough.  

Each county and city has their own point of sale requirements and many of the water/sewer districts have requirements for sewer lateral tests and clearances so you need to make sure who ever helps you is aware of ALL of the paperwork that needs to be in perfect order, not just the contract.

Hypothetically, as a builder / developer, would you pay a slight premium for property that has the federal historic tax credit of 20%, a state historic tax credit of 25% and a city empty building tax credit of 25% - capped at $500,000, as well as a dense mixed use approved PUD, and a tentative $5 mil TIF district for the site?

if it was just based on the numbers,  I would.But I would not make that decision just based on the number, I would consider the neighborhood, the school district if it matters, the type of tenant I would get, the condition of the house, etc?

With older homes you also want to make sure they are not in a historic district because that is a whole other set of problems.

I don't know anything about Belle Plaine but many cities have a Central Business District classification for Main Street and there are only certain permitted uses. 

We moved from League City two weeks ago because they have a great school district here.