3-fold locking system for apartment entrance door on the ground floor?

Dear forum,

we have purchased a condominium from the developer and the work on the apartment is almost finished. The handover will take place in the next few weeks. The apartment is on the ground floor and has a hobby room + bathroom and a second entrance door in the basement.

At the moment, we have planned normal single locks for both apartment entrance doors on the ground floor and basement level. We are now considering whether it would be better to equip the entrance door on the ground floor with a 3-point locking system (the door in the basement must remain a single lock for technical reasons). The additional cost for the three-point lock on the ground floor would be about 700 EUR (net), as the door leaf would also have to be replaced.

What would be your recommendation – leave it as it is with single locks on the ground floor and basement or at least upgrade the ground floor entrance door to a 3-point lock?

The door manufacturer told us to leave it as it is, because statistically break-ins on the ground floor happen much more often through the windows and terrace door rather than the apartment entrance door (due to a lot of public traffic on the ground floor). The risk of break-ins through the apartment entrance door increases with the height of the floor.

Thank you very much for your feedback!

PS: As far as I can tell, almost all apartments in the building project have normal single locks installed. Maybe we are just paranoid...

Locking is only one part of the security class. What is the door now? For entrance doors (depending on the area), I would choose certified RC2. Windows and patio doors are much more vulnerable. An appropriate protection class, lighting with motion detector, and possibly a camera also help. The last two points are difficult in a WEG because they affect the common property. Why are you doing all this afterwards now? It would have been much cheaper during construction. This way you pay twice. Depending on the protection class, different anchoring in the masonry is also required...

Locking is only part of the security class.
What is the door now? For entrance doors (depending on the area), I would take certified RC2.
Windows and patio doors are much more vulnerable. Appropriate protection class, light with motion sensor, and possibly a camera also help. The last two points are difficult in a WEG because they affect the common property.
Why are you doing this retrofit now? It would have been much cheaper during construction. This way you pay twice. Depending on the protection class, different anchoring in the masonry is also required...

The entrance doors have a profile cylinder lock and burglar-resistant protective fittings ES1 according to DIN 18257, plus a security door plate with core pull protection and an external locking cylinder covered with carbide. I don’t know which RC class that corresponds to.

The windows and patio doors have burglary resistance class RC1N with mushroom head fittings and lockable window handles. We have a constant power light outlet next to each window and patio door for later motion sensors (no cameras).

In general, the area can be classified as quite safe. We are building with a developer, and the special requests are limited both in selection and price.

Edit: I just see ES1 corresponds to RC2. See table in the attachment

ES 1 only says something about the protective fitting, but not about the overall system (e.g. door). Your windows and patio doors are the weakest link. Rc1n is a scam. Not even RC1. Security and the feeling/need for security are different things. Fear is a poor advisor. I would install an internal locking bar in the basement (if it is not visually disturbing). Leave the doors as they are and make sure to secure the vulnerable windows and patio doors with glass break sensors, motion detectors, etc. But with moderation. Don’t try to build a fortress. Actually, you are already too late for a security concept.

ES 1 only says something about the protective fitting but not about the overall system (e.g. door). Your windows and patio doors are the weakest link. Rc1n is a farmers' trap. Not even RC1. Security and security feeling/need are different things. Fear is a bad advisor. I would install a locking bar inside in the basement (if not visually disturbing). Leave the doors as they are and make sure to secure the vulnerable windows and patio doors with glass break sensors, motion detectors, etc. But with moderation. Don't try to build a fortress. Actually, you are already too late for a security concept.

Ok - thanks for the honest feedback Do I understand correctly that you would install a locking bar downstairs and leave the door as is upstairs? Or would you use triple locking upstairs? We consider a security concept for a condominium exaggerated for our needs.

Leave the doors as they are. In the basement, add a locking bar.
The security concept doesn’t have to be anything big. And as mentioned, it’s too late for that anyway (with reasonable effort).