Google street view, screen shots.
With big brother, nothing could be kept secret anymore...
You will need to drive there to see if "its for sale" :-).
Ok, guys, Don't get too confused by the photos.
It is common in the USA for smaller companies to simply rent out a "business suite", especially if they don't need a visible presence (ie. a company which only work son the web or a company which goes to the customer, rather than the customer going to the company).
Some of such business suites can be quite large inside and very nice.
The last picture is the one I came across when googling the latest address I got from the PB web site.
It is also important to note that google satelite photos and street photos can be a number of years old and no where near current. They can be 3,4 or 5 years old, so you can't tell much from them.
That's why i said "You need to drive there ...". These pictures can be quite old.