Single-family house with gable roof, without basement - Feedback desired

The thing with the podium staircase to the attic should actually work.

I tried to plan in the 5 meters in front of the garage, and it doesn't work! ... due to the then too narrow building window, it won't be satisfactory. Therefore, one can, or rather must probably live with the 3 meters, since it was also mentioned that it might be a cul-de-sac street?!

However, I can't quite read all the numbers on the site plan correctly, so it was only played through approximately.

However, I run into another problem:
Even if you can't deal with my arguments, you should deal with the thermal envelope. Since you include the left garage within the thermal envelope, an open connection to the neighboring garage should only work if everything is within the thermal envelope. This probably contradicts something again regarding the boundary development, floor area ratio, or the 160 sqm... so, I don't know, but I can imagine that it will imply restrictions.

The floor area ratio only refers to the house and attached terrace, not to paths and ancillary facilities.

The thing with the podium stairs to the attic should actually work.

I once tried to plan the 5 meters in front of the garage, and it doesn’t work! ... due to the then too narrow building window, it won’t be half and half. Therefore, one can, or rather must live with the 3 meters, since it was also mentioned that it would be a local traffic street?
However, I cannot read all the numbers on the site plan correctly, so it is only approximately worked through.

However, I encounter another problem:
Even if you cannot deal with my arguments, you should deal with the thermal envelope. Since you include the left garage in the thermal envelope, an open connection to the neighboring garage would only work if everything were within the thermal envelope. That probably contradicts something again regarding the boundary development, floor area ratio, or the 160 sqm... so, I don’t know, but I can imagine that it will entail restrictions.

The floor area ratio only relates to the house and the attached terrace, not to paths and ancillary facilities.

Unheated basements are not part of the thermal envelope of a house. You should roughly imagine it like this. The side walls of the upper floor are insulated with 36.5 cm solid brick with a thermal conductivity of 0.09 lambda. The garage ceiling including ring beam, which only goes halfway over the garage, is insulated from below. The second part of the garage has a flat shed roof, which connects to the main building. Here is the quick, non-scale sketch.

In RLP the floor area ratio relates to all soil-sealing installations. There are just different quotients for different types of buildings.

Yes, I am aware of the garage "extension". But not of the concept of an internally located garage. So practically the main house is built around the centrally located garage? Isn't that very elaborate, in other words, a cost driver? What about the storage room then? Same as the garage, I assume? One more remark: don't you think the landing staircase swallows too much space? After all, it is the staircase that uses the most square meters...

Grundflächenzahl bezieht sich in RLP

??? Why RP? The floor area ratio is defined in the land use ordinance. Was there a clause about it in your development plan? Sorry, but since it's not on page 1, I can't find it anymore.

So the main house is practically built around the centrally located garage?

No. The thermal envelope of the house is inside the garage. That which I have designated as XPS035. In terms of cost, only the statics of the central columns in the garage and the beams, as well as the insulation applied on the ceiling, are relevant. In return, you gain a good 30m² of garden space on the south side and can build the house about 1m wider.

What about the storage room then?

It is non-load-bearing and also non-insulating inside the garage, does not belong to the thermal envelope, and can also be quickly erected later using drywall construction.

Don’t you think the landing staircase takes up too much space?

The attached picture below should look familiar to you. The staircase I favor has 6.6m² with 3x2.2m and a tread width of 1m.
We currently have a twice quarter-turned staircase measuring 2.2x2.6m with a tread width of 1m. This consumes 5.75m². The main disadvantage of that staircase, however, is that two people cannot walk side by side on it, which happens very often in our family, and the windows have to follow the stair routing. Furthermore, a landing staircase is much easier to build and can be maintained if necessary (construction staircase made from 32mm OSB quickly made by oneself, etc.). For that, I gladly accept the 0.65m² of additional space consumption.

On the topic of floor area ratio. I looked into it again today and built a small Excel floor area ratio calculator. Here is an example calculation:


Therefore, more fits there than I assumed.

Yes, with a 50 cm knee wall the staircase to the attic works, if you start from the centerline of the staircase. That is why I had always written 0 cm knee wall. The discussion would have been over long ago if this information had been provided . After all, I also made the example staircase patterns .