ᐅ Final Stage of Floor Plan Design – Wearing Rose-Colored Glasses

Bang.
I don’t think that @11ant intends to upset you, but rather to give a timely warning, and I believe that’s the right approach!
I don’t want to judge the technical aspects of this extension, but after reading the original thread, I have serious doubts about the practicality of this project.
The question came up there as to why your parents don’t simply move into the upper floor, as it could be nicely designed in a suitable way for them. Forcing something to be built just because your parents apparently don’t want to change their established habits doesn’t seem like a good solution to me.
You may be submitting yourself and your family’s potential to the understandable resistance or unwillingness of your parents to change (I truly don’t want to offend anyone).
Everything should stay the same, preferably with no changes, but the positive things should also come along (children, grandchildren in the house, etc.). Maybe I’m mistaken, in which case sorry.
I faced a very similar situation many years ago and ultimately decided against it — fortunately.
If anyone lives in the main apartment, it should be you, with your large or even growing family, working adults, teenagers, increasing space requirements, and constantly changing needs in life.
Your parents may have already retired, and their family planning is likely complete; therefore, their needs will probably decrease rather than increase. As a result, the house dynamic will be upside down.
My parents sold their house a few years later, and we agreed on a sort of generational arrangement. We then enjoyed nearly 30 years living wonderfully in a newly built house: we on the ground floor with partial basement, and my parents in a top apartment with a roof terrace in the attic, perfectly tailored to their needs and much nicer than the old house.
This new house could later be easily resold as separate condominiums whenever your life changes over time.
If you write that building land near Ruch is too expensive for a new build just for you, why not sell your parents’ house at what is probably a great current price and build exactly the house you both need? Then your parents could live on the ground floor, upper floor, or in a separate extension — all of this can be planned according to size and needs.
But… older people often don’t want this because it involves too much change (which will happen anyway).
I don’t want my “growing” family to pay the price (in terms of lower living quality, unnecessary costs, etc.) for this lack of willingness, or to submit to the understandable but not really long-term-oriented wishes of the parent generation.
A pros and cons list for selling/rebuilding would quickly show you the best way forward, because as much as you love your parents, your first responsibility is to the well-being of YOUR family, and only much later to the wish of your parents for minimal change.
I hope you take this as I intend it — just food for thought to perhaps find the courage to think completely differently!

pagoni2020 schrieb:

I don’t think @11ant is trying to upset you,

Exactly. In real life, he is really nice. The same goes here, by the way.

pagoni2020 schrieb:

I don’t want to assess the technical construction background of this extension

This is certainly possible even for non-experts if you mainly consider the floor plan shown "in color extracts": the yellow crossed-out areas represent demolition, the gray shows the sparse overlap between old and new, and everywhere the exterior walls protrude in red, like the fingernails of supermarket cashiers, that’s where the extension sits and crushes the original building, turning it into a dark cave. It is easier to follow in the original thread, but it is also recognizable here that this seems like a prank from Till Eulenspiegel. The practically downward-open corridor staircase, attached like a fire escape, delivers the final blow to the marketability of the existing house. Not as a mercy act, but rather as a sneaky knockout, mind you. The poor parents would probably take their own lives during the shell construction phase if they realized what they had signed off on, since on one hand their beloved daughter really wants it, and on the other they believed they could grow old in their familiar surroundings. But as I said, I firmly believe that the usually criticized bureaucracy will pull the emergency brake.

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https://www.linkedin.com/company/bauen-jetzt/

Pinky0301 schrieb:

And then they watch and listen to the underwear spinning around?

I don’t really see that as a big issue since it’s right by the door. Many condominiums have separate laundry rooms in the basement. It’s just a bit impractical when combined with an office.

But some noise will probably come through. So the client will not only hear the laundry but also the family using the bathroom?

Pinky0301 schrieb:

And then they watch and listen to the underwear spinning around?

I don’t really see that as a big issue since it’s right by the door. Many condominiums have separate laundry rooms in the basement. It’s just a bit impractical when combined with an office.

But some noise will probably come through. So the client will not only hear the laundry but also the family using the bathroom?

No, the washing machine and dryer would be fully enclosed so they are not visible.
Client visits to this office are very rare, but they could happen occasionally.
In those cases, you wouldn’t have to do laundry while a client is present.

Climbee schrieb:

...and it makes it warm.

No, I don’t think that’s an option either. And clients are supposed to be received in the office??? Right next to the pile of dirty laundry or the running washing machine when underwear passes by the laundry room window?
You can’t be serious!

Client visits are very rare – if anyone does come, the washing machine is installed so that it is not visible.

Ideensucher schrieb:

Your children are supposed to shower for years in a 2.89m² (31 sq ft) bathroom? At 15, they will refuse.
Also, a 1.34m² (14 sq ft) guest toilet is really cramped. Remove that wall.
If you ever get unexpected guests: before they’re upstairs, you can quickly check the bathroom and toss any clutter into the children’s room.

Well, I would have been happy at 15 to have my own shower and my own mirror with my “makeup stuff.” The small bathroom size also made me unsure. But I visited a bathroom showroom yesterday, and they said the size is completely adequate, so I shouldn’t worry about it. I also grew up with a small WC—a tiny, private little spot—I definitely prefer a small separate toilet over one inside the children’s bathroom.

Apart from the bathroom and washing machine setup, which I don’t like, I completely agree with 11ant (I just reread the original thread). This will be a structural monster. Out of the question. I’m also hoping for official veto.

I can understand that the parents don’t want to change their environment. It was the same for us. Originally, we wanted to renovate my childhood home – but no way! We were lucky to be able to build next door. If that hadn't worked out, we might have waited for a suitable building plot or until my mother no longer lived in the house. Whether she would then be in a care home (which I never wish for her) or deceased – it wouldn’t matter. But then we would have renovated the house for ourselves and probably lived with a temporary solution in the meantime (because the chance of an affordable building plot is quite low). But such a monster would never have crossed our wildest dreams.