Is a 12m border construction "underground garage" possible?

Good Monday everyone,

we have a plot of land in Bavaria. If I understood correctly, according to BayBo, 9m long garages are allowed as boundary development.
The development plan is available and foresees a garage as boundary development. (I can look it up and insert it sometime)

Currently there is an old building on the property. According to the development plan, the garage (8m) is also located there.
From the street, the driveway rises about 0.5-1m up to the garage. The driveway is approximately 12m long.
(When I write it like this, 5-10% incline seems quite a lot to me. I will measure it)

Now my question is whether it would be possible to dig the garage in by 1.30m. According to my understanding, it would then only be 1.40m above the surface level and counts as an "underground building," which is not taken into account in boundary development / distance areas.
Is my understanding correct here?
Would, for example, a 12m long garage then be possible?
The garage would be a boundary development and on the other side directly at the house.
The house is supposed to have a basement. A connecting door would not be necessary but would of course be welcome if possible.

I assume I would have to think about earth pressure, groundwater level, drainage of the driveway, since the water would then flow towards the garage and not to the street.

And with the number crunching I would of course have to determine exactly how deep to dig in order to reach an average of 1.4m above ground level, and at which position which driveway slope occurs.

Have I forgotten anything else?

Best regards
FiToCaRi

Hello,

Garages are not buildings according to the building regulations, but simply garages. In my opinion, the floor regulations therefore do not apply. There are specific provisions for garages.

The 9 meters apply as long as the garage is not completely underground.

Best regards!

Is my understanding correct here?

Yes, underground structures do not create setback areas in Bavaria.

Show us the elevation conditions. You can't do anything with such vague information. Is there no plan of the property with the corresponding buildings and the development plan?

Why 12 m long? I find 9 m already quite generous.

Thank you very much for the quick feedback. The development plan is available. I just don't have it on the computer I'm currently typing on. There is also a construction plan for the old building. I need to check whether it contains any height information. It is already somewhat older. Please no fundamental questions about why I am concerned about 12m. Otherwise, the discussion tends to drift quickly. If a garage is not a building, then is a workshop hall with a large gate a building? Where is the differentiation made here? Solely based on the use?

Hello,

Garages are for parking vehicles, warehouses are not garages. Article 2 of the BayBO defines the terms. Garages are listed there separately alongside other buildings.

Best regards!