ᐅ Two-family house with two owners

Created on: 2 Feb 2025 23:54
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Waldrich
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Waldrich
2 Feb 2025 23:54
Hello,

My partner and I are planning to build a duplex together with a couple of friends.
The two living units are not stacked on top of each other but are arranged side by side in two equally sized sections, each with its own entrance door. From the outside, it looks like a semi-detached house with mirrored halves. Each half spans two full floors plus a converted attic. Inside the house, there is a shared utility room, which is proportionally deducted from each living area and accessible from both sides through a door.
There is a single heat pump serving both halves.

I’m interested to know if anyone has experience with a similar project. We have several questions regarding the partition plan, deed of division, and condominium declaration.
In order for each household to secure its own financing, these matters need to be clarified beforehand. From what I understand, the architect must submit the partition plan at the same time as the building permit / planning permission application, but I might be mistaken?
We are also concerned about separating the heating and water systems so that each party can be billed accurately for their individual consumption.

I would appreciate any experiences or advice on these topics.
11ant3 Feb 2025 00:32
Waldrich schrieb:

I am curious if anyone has ever completed a similar project.

Then I’ll tag @i_b_n_a_n for you: not two families, but four apartments; however, a duplex with a shared technical extension. The project was once documented here very thoroughly as an example.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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Radomiro
3 Feb 2025 00:40
That might be technically possible, but from a practical standpoint, I would strongly advise against it.

Best regards
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Waldrich
3 Feb 2025 00:56
Regarding the personal aspect, we have no concerns.
We have known each other for over 20 years and also spend holidays together, etc.
However, things can always change. That is why it is important for us to make everything as legally secure as possible.
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Waldrich
3 Feb 2025 01:04
11ant schrieb:

Then I’ll add @i_b_n_a_n: not two families, but four apartments; however, a duplex with a shared utility extension. This project was once documented here in exemplary detail.
Thank you very much for the quick response
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hanse987
3 Feb 2025 07:14
What do you expect to gain from this design compared to a traditional duplex with the same architect?