ᐅ Is it allowed to build a garage over gas, water, electricity, or telephone lines?

Hello.
We worked out a very nice floor plan (at least for us) with an architect. In this plan, the utility room would be located in the northwest part of the house, behind the garage. The utility lines come from the street to the west and would be routed beneath the garage. Generally, such lines are apparently not allowed to be covered by a garage. The architect suggested that the lines could be installed under the garage if no concrete slab is poured inside the garage, but instead gravel is used as a base, and then paving is laid on top. This way, the utility company would still be able to access the lines if necessary. I contacted the utility company today, and they confirmed that what the architect said is fine and the lines may be covered by a garage in this way.

What do you think about this idea?

The next question is... if we proceed with just gravel and paving, without a concrete floor slab, what about moisture, especially humidity inside the garage? I have already read through some forum posts and found some people who also wanted to build a garage without a floor slab and were uncertain. We would like to put up shelves in the garage and store various items such as Christmas decorations.

I’m interested to know if anyone has already built a garage like this and if you experienced any moisture problems. Also, what has been your experience regarding storing items like Christmas decorations or similar? Is storing such things possible on a non-concrete floor, or does everything get damp?

Looking forward to your experiences on this.

Best regards

I don’t see any issues with electricity, telephone, and water. According to DVGW, gas is not permitted, or there are exceptions, but the installation is expensive. My advice is to submit a request to the utility providers.

Bau-Schmidt schrieb:
I don’t see any issues with electricity, telephone, and water connections. According to DVGW, gas is generally not permitted, or there are exceptions, but the installation is expensive. My advice is to contact the utility providers.

Thank you for the feedback.
Gas also sounded feasible when I contacted the supplier. I have requested a non-binding cost estimate. Great idea.

Does anyone else have an opinion on this topic?

Also, regarding the storage of our miscellaneous items, such as Christmas decorations, etc., if no concrete slab has been installed?

I encountered a case where the gas line (pipe from the house to the public main line) was covered by a shed (with a paved interior). In the section under the shed, a pipe was inserted into the gas line—essentially a pipe within a pipe—and that was acceptable to the utility company.

Covering the public main line, even with a boarded-up carport, was not permitted. In this case, the boarding of the carport had to be removed.

One more note about the gas line. In our house, it was handled as follows: a connection point for the gas supply was installed outside the building (an external wall box). From this external wall box, the pipe then ran under the floor slab (beneath the screed) through half of the house to the boiler.

hstkai schrieb:
A quick addition regarding the gas line. For our house, it was handled like this: an external connection point for the gas supply was installed outside the building (external wall box). From that external wall box, the pipe ran along the slab on grade (under the screed) through half the house to the boiler.

Hello. That’s an interesting idea. I will bring it up.

Could you please share some of your experience regarding humidity in your garage? You don’t have a concrete slab floor in your garage either. That would be great.