Replying to Age to rent apartment in europe?

so i was wondering how old you have to be to rent an apartment in europe for 1-2weeks (more specifically switzerland) i want to hit up saas fee again this summer but try and do it for less money than i did last summer.

my question is do you have to be 18? or can you go at 16? i'll be 17 by the time i want to go but im just worried that won't be old enough...

im sure there are many people who have had experience with this before so hit me up!