The only exception to “no unreasonable searches or seizures by governmen” is that if the police hear or believe that something dangerous or illegal is going on inside that house or building while they are there.
the right of the people to be secure in their persons houses papers and effects against unreasonable searches and seizures shall not be violated and no warrants shall issue but upon probable cause supported by oath or affirmation and particularly describing the place to be searched and the person's or things to be seized
