If you can see it, you can shoot it

Let's get the easy stuff out of the way. Aside from sensitive government buildings (e.g., military bases), if you're on public property you can photograph anything you like, including private property. There are some limits — using a zoom lens to shoot someone who has a reasonable expectation of privacy isn't covered — but no one can come charging out of a business and tell you not to take photos of the building, period. ... You can take photos any place that's open to the public, whether or not it's private property. A mall, for example, is open to the public. So are most office buildings (at least the lobbies). You don't need permission; if you have permission to enter, you have permission to shoot.