New buildings are also subject to certain fire protection regulations, as are old buildings. But the regulations are not the same - simply because fire protection measures are much more difficult to implement in old buildings. Well-known measures for old buildings were the smoke alarms that were only introduced a few years ago for private buildings. The smoke detector requirement had already been active for a long time in new buildings.
But that's only a small part. In fact, the fire protection regulations for public but also for private buildings and new buildings are so extensive that there are usually fire prevention officers and lawyers at the respective construction company who solely take care of them. A consideration of the fire protection regulations for new buildings.