Well, the attorney will probably give the best advice. She or he is supposed to be trained and responsible. Might be expensive, though. Here it's free.
While the architect has rights in the building, those rights don't extend to being able to control the taking and sale of pictures in or visible from public places. Interiors is a different matter. Here's a good search term to Google up: "Architectural Works Copyright Protection Act of 1990"
Here's a place to look, as well as reading up on the Library of Congress copyriight website:
http://www.aepronet.org/pn/vol5-no2.html
Now, the images may very well contain trademarked or similarly protected signs, logos, advertising, etc. You do need to be aware of trademark but that isn't going to prevent taking or selling the pictures. Trademarks protect products and sources of products. You'll probably want to review those laws as well, mostly to see what you can't do. If you don't mimic a trademark or similar identifier or your products don't give the impression that your product is actually endorsed or produced by the trademark owner, it's unlikely to be a problem. For example, TransAmerica doesn't care if their pyramid is in your pictures - if you are selling pictures. Start selling insurance or financial products and get that pointy building in your ads, designs, logos, letterhead, etc., that could get nasty.
Check: Federal Trademark Dilution Act of 1995
There will be those who tell you that an individual has no privacy rights while they are in public. Not necessarily true. They retain their publicity rights. While the details vary from state to state, a person has the right to control the use of their own image and persona commercially. This doesn't mean their picture can't be sold (lots of ways it can be sold - news, art, etc.). It does mean that their image can't be used to endorse businesses, products, goods, services, etc. This is an area you should review carefully with your attorney because of the local variations. Nor can you disclose private facts, hold a person in false light, defame an individual, etc. Now typically, simple sale of an image that captured someone walking down the street doesn't do that. Context is important. New Orleans has some, uh, colorful entertainment establishments. A person walking down the street in front of a sleazy bar and you caption the image in a way that it suggests they are a customer of the bar, a prostitute, drug dealer, etc. That could be a problem.
These are just really basic sorts of general principles. You would want to be careful in applying any general principles to the specifics of your images and your applications. any thing you aren't pretty clear on, there are a number of websites prepared by attorneys that go into more detail and then, of course, discussions with your attorney if still unclear.
