Garage with in-situ concrete and 25cm floor slab

Hello everyone,

It is about a new building in Bavaria. A technical room is planned in the garage (a total of 40m2). Therefore, a prefabricated garage is out of the question. The structural engineer has calculated that the garage will be built with in-situ concrete. The garage stands on a floor slab with a thickness of 25 cm with frost skirts.

What do you think about this in terms of cost and practicality? Isn't it overdimensioned? Most neighbors have garages with floor slabs and bricks or limestone.

Thanks for your opinions

What do you think about it in terms of cost and practicality? Isn't it overdimensioned? Most neighbors have garages with floor slabs and bricks or limestone.

What should we say about it? - we don't know your entire construction project, and certainly not your property and its soil conditions. So: no idea what your planner considers more suitable or just nicer in concrete for a garage than in masonry.

A technical room is planned in the garage (a total of 40m2). Therefore, a prefabricated garage is out of the question.

I see no causal connection there. There are entire transformer stations in the same building system as prefabricated garages, so why shouldn't boilers, meter boxes, and water meters also fit in there? The concrete garage manufacturers - all of whom also have extensions half the size of a garage in their portfolio - couldn't care less whether you put a lawnmower or the entire building technology in there.

What are we supposed to say (can say) about that? – we don’t know your entire construction project, and certainly not your property and its soil conditions. So: no idea what your planner finds more suitable or just nicer in terms of concrete for a garage than for a masonry one.

I see no causal connection there. There are entire transformer stations in the same building system as prefabricated garages, so why shouldn’t boilers, meter boxes, and water meters also fit in there? The concrete garage manufacturers – all of whom also have extensions half the size of a garage in their portfolio – don’t care at all whether you store a lawnmower or the whole house technology in there.

I wanted to ask whether this type of garage construction is common. So far, I only know prefabricated garages and masonry garages. I have never heard of garages with in-situ concrete, and there isn’t much about it online either. Is this a cheap or expensive construction method? Maybe someone has built something like this and can share their experience with me.

Has anyone maybe built something like this and can share their experience with me?

Wouldn't you first like to enlighten us on why, in your opinion, a technical room would be a killer application for a prefabricated garage, and what is meant by

The structural engineer calculated that the garage will be built with in-situ concrete.

– is that supposed to mean that the structural engineer of your general contractor kindly took care of the floor slab for a "site-provided" garage (and naturally designed it for the worst case, since that would be an in-situ concrete garage)? In this way, you might end up spending more "extra" on the garage than you had dreamed of saving by procuring it on your own. A classic backfire, in other words. This is really (unfortunately a very popular but) a major blunder, to ask only a single question here instead of getting comprehensive and holistic advice about your building project from the forum community!

I wanted to ask if this garage construction method is common. So far, I only know prefabricated garages and masonry garages. I have not heard of in-situ concrete garages before, and there is not much about it on the internet. Is this a cheap or expensive construction method?

This is an absolute exotic construction method. Only people whose motorhome alone is more expensive than a house for ordinary mortals can afford an "architect garage."