ᐅ Large office space or a separate guest apartment?

Created on: 16 Jan 2021 12:09
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Kati2022
Hello everyone,

The time is slowly approaching. Our municipality will be selling building plots in the new development area starting mid-March. Since we are a family with two children, we have a good chance of securing a plot.

I have been thinking about this for a long time and now need your opinion. Since I am a teacher, I definitely need an office. My husband is also working more and more from home, so the room could be a bit larger. The house is planned to be an energy-efficient house standard 40/40+. Maybe it would be better to build a separate apartment for the office right away? That way, we might benefit twice from the subsidy. Of course, a separate apartment costs more (50,000? 100,000?), but it also offers more flexibility...

Does anyone here use a separate apartment as an office? How large should the unit be? What is clear: bathroom + kitchenette + separate entrance. A room size of 16–20m2 (170–215 sq ft) would be completely sufficient for us (+ WC with shower + small kitchenette (2m2 / 21.5 sq ft)).

What do you think?
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kbt09
16 Jan 2021 20:22
And then the parking space requirements.
Kati.com schrieb:

A room of 16-20m2 (170-215 sq ft) would be completely sufficient for us (+ a bathroom with shower + a small kitchenette (2m2) (21.5 sq ft))
I think that’s unrealistic ... it’s better to plan for 2 rooms. If someone often has to hold conference calls or training sessions, it’s very disruptive if there is a second person in the same room. There are some technical solutions for this, but it’s preferable to plan for 2 rooms as described by @ivenh0.
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WilderSueden
16 Jan 2021 20:40
Such a subsidy is nice and all, but as others have already mentioned, where should you put it? The basement is the most obvious option, but it is significantly more expensive than the subsidy if you had otherwise built on a slab foundation. A basement with KfW40 standard is very expensive anyway. And if you don’t want to stay in the dark all the time, you also have to plan accordingly with light wells, etc., which is neither simple nor cheap. It’s a different story if you have a sloped site, then the basement is a given and you can get natural daylight on one side easily. Plus the possible exterior entrance. Then simply add a lockable door at the basement stairs, and you have a separate apartment that can either be accessed from the living area or independently from outside.

In short, without details about the plot, no one can give you meaningful advice.
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Kati2022
16 Jan 2021 21:10
RotorMotor schrieb:

What exactly do you want to know now?

What do you think about this? Would you think similarly in our situation? How much would a granny flat cost extra (a home office is needed anyway): $50k-$100k?
haydee schrieb:

What does the zoning plan specify? Usually, a parking space is required per housing unit, etc.

Two parking spaces per housing unit. We want a double garage anyway. I think the driveway (at least 5m (16 feet) paved area) could be counted as a double parking space 😉.
We are building without a basement. The second dwelling must be on the ground floor. I know it needs a separate entrance. But is it allowed to be additionally connected to the main apartment (a door)?
Renting out to strangers is not planned. Possibly for our own children if they (and we) need more privacy, or for our parents if they are no longer able to live independently...
These are just options we are considering.

We are building with an architect. I assume he can properly plan such a small separate unit 😉. But I want to contact the architect only after I get approval for a specific building plot.
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Kati2022
16 Jan 2021 21:20
WilderSueden schrieb:

In short, without details about the plot, no one can give you meaningful advice.

Yes... that’s why we are already dealing with the subject now. About 40 plots are available. When applying, we have to submit a ranking list with 5 building sites. Most of the area is flat. A few of them have a slight slope (I would say about 1-1.5 m (3-5 feet) elevation difference within the building area).
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MontyPython
16 Jan 2021 21:35
We have a similar plan. This means we have declared a 16 m² (172 sq ft) office/guest room on the ground floor, a 4.5 m² (48 sq ft) shower room, and a 2.5 m² (27 sq ft) hallway as a separate apartment. Access is possible both from the main hallway and from outside. So, we have a house with two separate residential units. According to our energy consultant, there is no minimum size requirement for such a unit from KfW, and our architect has already implemented this arrangement in several houses.
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Kati2022
16 Jan 2021 21:44
MontyPython schrieb:

We are planning something similar. This means we have designated a 16 m² (172 sq ft) office/guest room, a 4.5 m² (48 sq ft) shower room, and a 2.5 m² (27 sq ft) hallway on the ground floor as a self-contained apartment. Access is possible from both the main hallway and from outside.

Could you share the floor plan of your ground floor here (or in a private message)? I would be very interested.