Smoke detector: In which rooms is it really necessary?

Hi guys,

Our move-in is coming up soon and our electrician asked us where and in which rooms we want smoke detectors. These are apparently devices that are stuck to the ceiling and have a lifespan of 10 years. Then the non-replaceable battery is empty and you have to replace them with new ones.

House layout:
Upper floor: Child1, Child2, Bedroom, Dressing room (with access only through the bedroom), Upper floor hallway (0)
Staircase
Ground floor: Kitchen, Dining area, Living area (both rooms combined in a relatively large living space of approx. 62m2 that are not separated from each other), Ground floor bathroom, Pantry, Hallway
Staircase
Basement: Utility room, Laundry room, Storage room (currently just an empty room intended for things to be stored, bicycles, things to keep, etc., etc.), Office

My suggestion now is (the numbers in parentheses indicate the number of smoke detectors):
Upper floor: Child1 (1), Child2 (1), Bedroom (1), Dressing room (with access only through the bedroom) (0), Upper floor hallway (0)
Staircase (0)
Ground floor: Kitchen (1), Dining area (0.5), Living area (0.5) (both rooms combined in a relatively large living space of approx. 62m2 that are not separated from each other), Ground floor bathroom (0), Pantry (0), Ground floor hallway (1)
Staircase (0)
Basement: Utility room (1), Laundry room (1), Storage room (currently just an empty room intended for things to be stored, bicycles, things to keep, etc., etc.) (0), Office (1)

* The two 0.5 smoke detectors are intended so that one smoke detector is installed in the transition area between the dining area and the living area.

Would you do it like this too? How is it in case of a fire? Is there a kind of "fire protection regulation" for single-family houses? If yes, does my plan comply with it?

Yes, there are, you just need to enter it in Google. Therefore, you need an escape route in the corridor [OG] and [KG]. Better to add one more than one too few, these things don’t cost anything.

Everything is stated in the building code of your federal state. Generally in all bedrooms and hallways, but each building code has its own little peculiarities. I wouldn’t install any in kitchens, as cooking can often trigger a false alarm.

Google it, you immediately get results with pictures where it is "mandatory" and optional.

Everywhere in living rooms and hallways. None in bathroom and kitchen. Done. Far from any regulations. Especially since it sounds like the 10-15€ model will be used. Simply one more than too few

+ Utility room (optional) In our neighboring development, a gas heating system overheated and also set fire to the garage. The "smoke detectors" were the neighbors who noticed flames in the garage... You can also retrofit it yourself. The "brand" costs about 15 euros, with a 9V block battery that lasts 10 years, but the detector itself may need to be replaced after that.