ᐅ Living Above Workshop / Garage

Created on: 12 Jun 2017 14:02
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Gudrun2000
Hello everyone,

I’m new here because my husband and I have just started looking into building a house. I would appreciate your advice or help with the following matter:

My husband is self-employed and needs a workshop for his work, where some goods can also be stored. Our idea is to have a house where the ground floor (on a slab foundation) would be used as a workshop, storage, double garage (for two electric cars), utility room, bicycle parking, food storage, etc., and the upper floor would be our living area. We don’t have children (and we’re too old for that), so we’re thinking about 100–120 square meters (1,076–1,292 square feet) per floor.

We would prefer to build with precast lightweight aggregate concrete elements, as this is said to be faster than traditional solid construction.

Is our idea completely unreasonable, or is there perhaps someone here who has built something similar?

Thanks in advance,

Best regards
Gudrun
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Gudrun2000
12 Jun 2017 19:21
Thank you all in advance for your suggestions. We have, of course, already given some of these matters some thought.

My husband’s business is a quiet one, meaning we ultimately do not produce more noise emissions than a typical family without a business (our previous neighbors can gladly confirm this). We have a large plot of land in mind on the outskirts of a village, and we have good contacts with the local administration and the building authority (building permit / planning permission office). Additionally, I would be the builder and owner (since my husband is a sole proprietor with full liability), and I can rent out the floors and rooms to whomever I want. Is that correct?

I have also considered the resale value (when we move to a retirement home in 30–35 years). If we install all the water and electrical connections in the workshop/garage on the ground floor from the start, it might be possible to convert that space into a secondary apartment later. However, we would then also have to plan for two separate entrances from the beginning.

I will definitely continue to explore the idea of using prefabricated components on the ground floor and adding additional floors with a prefabricated house.

Thank you all very much once again!
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Nordlys
12 Jun 2017 20:44
If the plot is large enough, build yourself a bungalow with a hall next to it. You can rent out the hall. Construction of halls is not subject to any energy-saving regulations, it is inexpensive, and the residential building is truly single-story. If the care home calls, such a complex in the countryside can also be sold. Karsten
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Gudrun2000
12 Jun 2017 22:05
The hall next door was our very first consideration, but that only works if we get a really large plot of land.

Is it actually necessary to build the ground floor according to the energy saving regulations if only a workshop, garages, technical rooms, etc. are planned on that floor? It wouldn’t be considered "living space" then.
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ypg
12 Jun 2017 22:53
I would at least plan part of the living area close to the ground floor. You can also plan an office above a storage area – ideally a kind of duplex, where the commercial part could later be repurposed through minor renovation work.

Best regards, Yvonne
11ant12 Jun 2017 23:39
Gudrun2000 schrieb:
and I can rent out the floors and rooms to whoever I want, right?

That is incorrect: a restriction on usage is definitely possible if the plan does not allow for that use. How much leeway the municipality has regarding "non-disruptive commercial use" I do not know.
Gudrun2000 schrieb:
The tip about using prefabricated parts on the ground floor and adding a prefabricated house on top

Not necessarily prefabricated parts; I’m thinking more along the lines of a modular hall or garage. In my area, for example, there is a garage builder who uses aerated concrete slabs. For commercial halls serving this purpose, I would build them from "aerated concrete" (gas concrete).
Gudrun2000 schrieb:
If only workshops, garages, technical rooms, etc. are planned on the ground floor, does the ground floor still have to be built according to the energy saving regulations?

No, but for various reasons, mainly structural, it makes sense not to make the wall construction on the ground floor lighter than the floors above.
ypg schrieb:
An office can also be planned above a storage area – ideally something like a duplex,

Yes, vaguely I’m thinking in that direction too: combining storage/office with living space is okay, but the garage/workshop should then be separate as its own building or building section.
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phiwoo13 Jun 2017 22:24
I built my house exactly like this. First, a basement, then on the ground floor (GF) three garages with three doors, above that my apartment, and above that another apartment that I rent out (converted attic). KFW 55 standard, interior area just over 330m² (3,550 sq ft). The garages are thermally separated from the living area (under the screed, there is PUR insulation with a thermal conductivity of 0.022 W/mK). The house is still under construction but in the final stages (only painting and similar finishing work left). If you have any questions, feel free to ask.

The house is mainly made of (precast) concrete and sand-lime brick walls because the garages are not separated but completely open. You have to accept a few pillars and a large lintel, etc.

The entrance to the house is on the side; the doors are at the front! Additionally, one garage door has a pedestrian door.

PS: First post!

Best regards,
Philippe