New construction security options for windows and front doors

In my opinion, lockable olives are at most protection against bursting out, but not burglary protection. It only prevents the olive from turning, which is inside anyway – no additional bolt goes into the frame or anything.

I meant a security fitting so that the window cannot be easily pried open

A burglar will probably not go through the wall in our case, that would be way too loud in a densely populated new development area

Likewise, it is probably too loud to break the glass

Nothing is 100% burglar-proof, you basically only buy time and effort and noise that the burglar has to sacrifice, and that can already deter him

In my opinion, lockable olives are at most a protection against escape, but not against burglary.

If you don't have a lockable olive, a hole the diameter of an arm/hand would be enough to get in. The lockable olive would force the burglar to make a hole large enough to get their whole body through.
However, I suspect that prying open windows/patio doors with a crowbar is faster than drilling a hole or smashing a large hole in a pane. But putting all windows up to a high security standard would definitely cost several thousand €.

I doubt that you can make a hole in today's two- to three-layer window glass without safety glass yourself. At least not with a glass cutter like in old movies. So if anything, you break the pane and then it doesn't matter whether it's an arm-thick hole or a 70cm hole.

If I get it right now, as my husband keeps trying to explain to me, burglars don’t go through the glass, but through an almost invisible hole in the handle/frame, where a thin wire is enough to pry open the window handle or the mechanism, so lockable handles offer more protection than you think, IF you neither leave the key inserted nor leave it lying within half a meter around it.

We once had a quote for retrofitting our windows (replacing the hinges and lockable window handles with 100 Newton): 10 windows 6k €.

The window installer’s tip here was actually to saw a wooden batten to size, which you clamp from the inside into the fixed part when (longer) absent, so that the door can no longer be slid open. Additionally, we chose lockable olives on the ground floor.

You can also do that once every evening if necessary. A roof batten or a stronger stick is enough. However, a secure method is not cool and doesn’t generate sales, therefore it is rarely recommended. It’s always funny when people claim that THE burglar does it such or such a way. You have to assess your own situation, personally and locally, and not let yourself be guided by general fears and decide WHAT or WHOM you want to protect FROM WHOM EXACTLY. Security is too often used as a general term and therefore to some people simply means Everything or Much. But if you keep doing something useless repeatedly, it still remains useless. Unfortunately, even at the police advisory office you usually only get general advice. Example: A front door is rarely or never broken open. But if it happens to be completely not visible or the crook knows for other reasons that there’s something very special to be had behind it, it could be different again. But then it could also be that this one takes you in a headlock upon arrival... At some point in the last decades, the police changed their wording and now only talk about creating a feeling of security. That’s what it’s generally about, creating the better feeling; whether this corresponds to reality is another matter. There are so-called "window drilling" methods just like the brute force breaking with a crowbar or smashing with a stone. The definitely most common and predominantly used method is with an ordinary screwdriver, i.e. prying open windows and terrace doors on the ground floor. But then comes the common facade climber... or the roof intruder... o_O