Jurisdiction germany:
The police does not have to wait, but common advise is to call a lawyer or at least a neighbour to act as a witness and ask the police to wait.
The common principle of commensurability applies to search warrants as well. So unless there is immediate danger (e.g. of you or someone else making things disappear) they might wait, especially if it's just a few minutes. ButWhile no specific law forces them to do so, not waiting a few minutes when it would not hinder them to do so opens them up to legal challenges on those grounds. Calling Calling a lawyer also gives an opportunity tofor the lawyer to talk to the police by phone, even if arriving at your place takes taketime.
Sidenotes:
- In Germany, there are restrictions on time, the police can't serve a search warrant in the middle of the night, unless they convince a judge of immediate and urgent danger.
- German search warrants also have to state what is to be searched and seized and again the principle of commensurability prohibits police from searching or seizing other things. That's why lawyers generally advise you to just hand over or show them where to find what they're looking for, which minimizes the mess they'll cause.
- Fun fact: If they break your door, or otherwise damage your property, they have to pay for the damage, if it exceeds 25 Euros.