You can obviously search Google, but a method I've used before in addition to my network is to visit construction suppliers (companies like ORCO Block) who supply builders with construction materials.

I am thinking about asking her to get a letter from the housing court proving that these claims are not against her but someone else with a different name.

Thanks Cesar - I found the owner, now I need a sample letter...

Probably the funniest marketing failure I’ve had was when I bought a few reams of yellow paper and created a yellow letter that would take up only half the page so I could put two letters on each sheet, printed in landscape orientation.

A couple of things...1) one of my closest friends lives 1-block away, so I know the area well.  

its not in the worded hood but on the outskirts of the hood, my block is nice and law enforcement officer lives across the street.

Today I wrote a letter to a guy who has his property listed on Zillow but not through the realestate agency although he is a realtor.

The different of a few blocks can mean the difference between fairly comparable rental units being able to command $2000/mo in rent vs. $3000/mo in rent, and if you don't know the areas well yourself, you run the risk of buying something one block too far over-In return for high cost of entry and high rents, the returns are larger. 

I say it's what it would fetch on the market, but there really aren't many comps except on the other end of my block where someone demo'ed a house (anticipating later construction) on a same-sized double lot (102x134) but their cross street is a quiet street, and mine is busy.

Knock on the door, mail them a letter?