The defence of house or real property is available where:
Where a homeowner has reasonable grounds to believe that the victim was a trespasser
the trespasser had reasonable opportunity to withdraw after they ought to have realized they were trespassing,
the trespasser did not withdraw
the threat of force or actual force must not be more than was reasonable under the circumstances
the threat of force or actual force was no more than what the accused reasonably believed was necessary to remove the trespasser
A trespasser can include the police who are not lawfully in the dwelling house.
A dwelling house includes hallways and stairwells,[3] as well as stores.
There is no obligation to retreat when defending a dwelling house.
Any force used that was above and beyond force necessary to defend property is criminally liable.