And this happens every time? In every situation?
Only needs to happen the once.
If you are quite happy to give the authorities free access to your private property, well, good for you.
Remember that most immigrants stay in sublet rooms, so if the law is changed to allow it for sheds (they are part of the property), ALL the same arguments will apply to your private house.
Got more than one bedroom, better have the police in then!
Got nothing to hide, so what's your problem?