Respectfully, Michael GriffinHeath, Ohio...

Also, if it's here in Chicago, I will have my GC and my real estate agent rehab and market the property respectively - again, I want to be in control when dealing with a newbie.

I've probably installed a hundred well-respected, custom made vinyl windows so far. 

In any respect, send the letter to the owner of the record, you can rest assure someone will get your mail. 

@Eric BowlinThanks for the input.Some of the reasons you mentioned are the reason I use it now as a supplement.Normally, there would be a dozen of two of 8.5"x11" pieces of paper with detailed information, floor plan and inside photos, as well as web address for additional photo, my phone number, email etc...all on one single page.The problem is when that runs out...I put the box up first day all the papers are gone, probably from nosy neighbors walking by, so the QR code is a backup, it's better than an empty box.Obviously it's only for those who drives by, those who found the place on the web already have the web address and relevant information.As far as popularity goes, I guess my experience is a bit different.A recent quick survey I did at a party and a picnic, most of the younger kids, by that I mean teens and in the twenties have QR code reader apps on their phones, there is no need to download an app. 

I used to have a lot of Respect for the Lindhal program because the books were well written, and had some good information in them.

My clients, after having seen the photos, description and various other details, I sent the coordinates of the villa in Google Earth for exact location.

Actually, you lend credence to the saying "the stone that the builder refused has become the main cornerstone to the house"Yes, sometimes rejected properties get a reprieve and you have shown that here in your before and after photo displays.Thanks for sharing.

All new windows, plumbing, electrical, roof, water heater, etc.I have to respectfully disagree on this.

I've had my share of good and bad but I find when you treat people with respect, dignity and a decent level of service in many instance you will get that back.