Asked what would happen if a homeowner refused to allow inspectors into the house without a warrant, Wallner replied, "We get an administrative search warrant. Then they have to let us in, but that never happens." This is ridiculous. An "administrative search warrant" is nothing more than a piece of paper. Search warrants are issued by judges upon a demonstration of probably cause by the requesting agency (police or otherwise). The judge performs a critical, constitutional gatekeeping function.
The residents have the right to use deadly force to repel the invasion.