I am working on a 1 minute film project that is to be created using stills photographs. I have to submit talent and location release forms with the final film and I understand the use of location release forms for shooting on private property. For me it gets a bit hazy around the need for release forms when filming outside. The issue is I want to take a photograph in a city centre street that will show an office entrance door (no people in shot). I do not plan to photograph any distinguishing company logos that would identify businesses using the building. Would I still need to get permission to photograph the building? I would take the picture anyway but guerilla shooting/filming is not allowed on the course I am doing.