I am certainly no lawyer, but I know that there is a big difference between shooting pictures of buildings for editorial use i.e. news stories, etc. and deriving profit from the sale of pictures of private property. A property release needs to be obtained before selling pictures on a for-profit/stock basis. A good source for further information on this is to visit the website of the American Society of Media Photographers at
http://www.asmp.org
I also found this page that has a quick overview of releases both for property and models:
http://www.asmp.org/commerce/legal/releases/