Floor plan of a single-family house, feedback

If you do it like that, you can consider giving the utility room a side entrance (on the wall side with the garage, but not inside the garage). Then you could also put in a dirty washbasin for when you come back dirty from gardening or something. Although I first asked about the price tag, such a side door is something different than "just" moving walls.

We have that too and I love it. Quickly washing hands, quickly getting a bucket of warm water to wash the motorcycle, laundry straight outside to hang up…
That is one of the things I didn’t want to miss.
Here’s another suggestion for guest room and WC. Then maybe a cabinet or something similar could fit in there.

We have that too and I love it. Quickly washing hands, quickly getting a bucket of warm water to wash the moto, hanging laundry outside right away...
That's one of the things I didn't want to do without.
Here's a suggestion for the guest room and bathroom. Maybe a cupboard or something like that would still fit in there.

I'll keep that suggestion in mind, now I'm just waiting to see the reaction to this request in general.

The only thing that worries me a bit about the side entrance is that it is another possible entry point for unwanted guests. (Although then the question is whether it or the terrace is easier).

Good. Based on and I painted a bit more, and just put that in an email to the company, let's see what comes back. Whether the WC in my painting is big enough, no idea, they can better adjust it in the program so it fits just right. For visualizing the wish it's enough.

I would like it this way much better. WC quickly accessible from the entrance, and also quite well reachable from the living area. And also intuitive for guests.

If you do it this way, you can consider giving the utility room a side entrance (on the side of the wall with the garage, but not in the garage). Then you could also put a dirty sink there for when you come in dirty from gardening or something. Although I also first asked about the price tag, such a side door is something different than "just" shifting walls.

Next to the official price tag (depending on manufacturer for door and sink connection) there will be an invisible price tag here as well. The most important thing in the utility room is wall space. You need a tremendous amount of it. Of course, it's nice and important to be able to dry laundry or iron in the middle. However, the main stuff in the utility room all needs walls. Meters, main electrical box, photovoltaic + storage, washing machine, and so on and so forth. I would first check in the utility room if the wall space is sufficient for my needs. If there is still some left over, then a door can always be considered.

That's definitely great. But I would first see if it works spatially.

He simply installs modules from a manufacturer that are not locally queryable via, for example, Modbus, but for which you have to query the manufacturer's cloud.

Photovoltaics on a flat roof is totally easy. I would build an east-west system with a super simple Triton mounting system (or another machining-free system), and since you come from an electrical background, you will also find an inverter that supports your preferred interface.

One of the most common routes will be from the living/dining area to the toilet on the ground floor.

That at least does not correspond to our way of life.

However, one might also consider swapping the guest/WC area with the technical room... that would be an option!

I see the slight seclusion of the guest room as an advantage. I would definitely not swap that.

Many try to plan the toilet away from the dirty area.

That surprises me. In our everyday life with many children playing outside, the route through the front door to the toilet was at least as frequent as from the living room. - also just mentioned this while I was writing.

The roof structure really is not important to us.

The roof structure is also not a problem, only that finds it ugly. However, he does not live across the street and will get over it. Greened flat roof – that sounds good and quite sensible to me. In densely built-up areas, green roofs help the very local microclimate, as the roof heats up significantly less than a pitched roof with concrete roof tiles. Regarding Fingerhaus – I have no experience with the quality of the company. What I remember positively is a salesperson who switched from Fingerhaus to the software industry, where I also took a job. We had a joint onboarding and later kept having contact. I liked the customer-oriented approach and the genuine interest he had in the requirements and challenges of his customers. Ultimately, he did not like direct software sales so much and switched back to Fingerhaus. Since then, I have had a positive prejudice towards this company.

I’ll keep the suggestion in mind, for now I’m just waiting to see the reaction to this request. The only thing that worries me a bit about the side entrance is the fact that it is another possible access point for unwanted guests. (Although the question then is whether that or the terrace is easier).

You have to secure that accordingly. Like the front door.

IF they actually had influence, it would have been a project over many years, the plan is already somewhat older. But – the others there failed FOR US for reasons quite different than the roof.

So you could have chosen a different construction company? – then the tax trap would probably have been avoided. Who were these others, and where did they fail (or: fail to convince)?

The roof structure is really not important to us. (Although I even like a green flat roof).

A green roof is climate- and also otherwise biotope-friendly. But its construction is critical, and the substrate for planting is heavy. Solutions that could be conceptually classified as a "prefabricated house" type might be advisable here. So a roof construction concept as a significant differentiating feature / stumbling block for competitors, and with details to be comprehensively taken into account (also for downpipe ventilation penetrations, for example). Hence my idea of a project construction area.

The roof construction is not a problem either, only that @11ant finds it ugly. But he does not live across the street and will get over it.

I never said that, and certainly not referring to the technical construction. After all, an optical disaster is not planned here, for example erecting a monstrous roof overhang and/or a fat parapet.