Additional costs for residential units

I had the same thought. The tent roof is positively rated here because it does not quickly become a full floor. But in my opinion, a living-dining area with only roof windows is out of the question. A large dormer is the minimum. To plan the 3 full floors, one would first need to know whether these are even permitted?

I am somewhat relieved for now that my attic calculations are roughly correct and that I didn’t make complete nonsense of it. After yesterday, I already had my doubts :D Basically, the version with the knee wall as it is now is the one I had planned before. That’s why I was always so surprised that you all called me stupid regarding the potential living space. I simply didn’t know it was a knee wall because I had imagined the whole roof structure differently. Otherwise, I could have expressed myself more clearly right from the start. I have learned quite a bit in the last 24 hours. For that, I thank you all.

Eine grosse Gaube ist das Mindeste.

The idea developed somewhat similarly in my head when the issue of escape routes came up yesterday and it became clear that I would have to do something here if it were to become a full-fledged living unit. My first impulse, however, was something like a small roof balcony facing south (so on top), to have an escape route from there, a nice view, and lots of light for the attic. Of course, that would bring little additional living space, more of a “luxury feature.” A normal dormer, on the other hand, would provide a few more square meters of truly usable living space.

Two things have kept me from the dormer so far:
1.) I’m worried that the insulation of the roof will become much more difficult/expensive as a result.
2.) The roof structure becomes even more complex. A hip roof is already a nightmare for every carpenter/roofer, from everything I’ve read. I didn’t want to make it any more complicated hastily. My architect can only hang me once, but I like him a lot, so I wanted to spare his pulse ;)

Why don’t you simply plan a 2-meter knee wall for your attic right away, take 22 degrees pitch and thus reduce your house height by about 50 cm, but then have a three-story building with many escape routes? :cool:

To plan 3 full stories you would first need to know if they are even permitted?

Yes, the idea of the high knee wall is very cool. However, I share the concern that hanghaus already mentioned, namely that I might not be allowed to have three stories. I will try to find something out. That would of course be really comfortable and also a bit extravagant ;) If I otherwise wouldn’t allow any frills on the house visually, that would be the little “special touch” I would like to have. Three stories or “almost three stories” (I suspect this high knee wall would count as 2.5 floors?) are rather rare here. By the way, from when is a floor considered a “full story”? Are there standard values for when you have a two-story/2.5-story/three-story building?

But to be honest: I already distanced myself quite a bit from the idea of a full-fledged living unit in the attic last night. I’m worried that the requirements for parking spaces per living unit or a general restriction on the living unit will ruin that for me anyway, even if I manage the second escape route. Therefore, I don’t want to get my hopes up too much right now. If there can only be two living units, so be it. Juniora can live up there anyway. Or the godchild, who would also be a candidate for a tenant in 10+ years.

What do you think of the floor plan overall? Has it become somehow clearer/more convincing with the idea of 2/3 living units and this modular principle? I thought that three parties could definitely live there (assuming one of them is us, I can only imagine that with family or quasi-family). Theoretically, one could also remove the door to living unit 2 and then live on the ground floor and first floor. Or alternatively remove the door to living units 2 and 3 and then add something at the entrance to the first floor in order to live on the first and attic floors. The system is certainly not yet mature, and I’m sure improvements can be made, but at least I wanted to plan/explore it before ruling something like that out from the start.

Well, it's always difficult to assess floor plans without a few measurements. The bedroom and closet stand out to me; it will be too tight.

In general, floor plans should definitely be furnished to scale, then you can immediately see many tight areas.

Of course, it would bring little benefit to the living space, it would rather be a "luxury accessory".

Well, knee wall, wooden construction, fixed stairs, house corridors, roof windows with full thermal protection… that is already pure luxury, so a roof terrace doesn’t really make much of a difference. However, it would also be necessary to offer the room under the roof some kind of view at all (putting aside fire escape path). Quality is something else entirely. But you don’t want to rent it out anyway; the kid is supposed to be happy with the kitchen and so on. For that, you live in a not exactly neat apartment in your own house. But well: sacrifices have to be made ;)

so that I am not allowed the three floors. I will try to find something out.

Forget it! Not from my side. That was a joke :D Your planned use for the teen/junior already contradicts any effort and the argument: cost-optimized living space usage. See above. I also assume, in a new development area, that no more than 2 residential units are allowed, but we’ve already had that topic. Converting the attic into living space is usually only unofficially permitted.

I suspect this high knee wall would then count as 2.5 floors?)

From when is a floor actually considered a "full floor"? Are there standard values as to when you have a 2-story/2.5-story/3-story building?

a minimum room height, which depends on the state building code.

Rooms for living purposes are also defined in the state building code.

Still the state building code, take the one from Lower Saxony!
It also says:
4) In buildings with more than two apartments or on the building plot of such buildings,
1. easily reachable and well accessible storage space for rollators, prams, and bicycles as well as
2. storage space for each apartment
must be available in sufficient size.

Well, it’s always difficult to assess floor plans without some dimensioning. I notice bedroom and closet, that will be too tight.

In general, one should definitely furnish floor plans to scale; then you can immediately see many tight spots.

I think measurements don’t bring much added value here, Kerstin.

Edit: The state building code should also state that roof overhangs starting from 50 cm are included in the floor area.

I think measurements don’t add much value here, Kerstin.

I agree, because I basically don't find the floor plan open to discussion. After all, the first glance already shows that these are not optimized rooms ;) ;).

My first impulse was something like a small roof balcony facing south (so upwards)

What do you mean by upwards??? Should the fire brigade drive through the front yard with the ladder truck, circle the house and set up the ladder in the garden? The dormer goes to the front facing the street, otherwise no escape route. Very simple. This is not going to work... just build a normal, slightly larger city villa. If the family is supposed to stay together on the living floor anyway, you can forget all that nonsense about granny flats and separate living units. Stylish city villa with plenty of rooms, then the thing will also have a good resale value and won’t be such a terrible unsellable architect’s house with 30 construction faults.