Floor plan of a bungalow on a slab approximately 110 sqm

I think we misunderstood each other. I'll try again more concretely: My garage is built with 17.5 at the boundary and allowed. Would a masonry with 36.5 have been forbidden -> because insulated? If yes, where is the limit?

No, the legislator does not care about the thickness of the stone you use to build your garage; the main thing is that it is within the magical 3.00 m distance area and does not cause any construction obligations with its height.

If 36.5 is not forbidden, then I would have a technically sufficiently insulated room for the technology. Or where is my error in thinking?

The technology in the HAR, moreover at the property boundary, requires on the one hand an insulated room (the technology must be accommodated within the insulated envelope), on the other hand, mostly at the boundary no other use than that of the garage/carport is allowed. Exception: semi-detached houses. Rhineland regards

I find that the ratio of the room sizes to each other is not consistent. The bathroom is, as already mentioned, far too small for a T-layout.

Best regards

T-layout works with a room depth of 3.20 m

I think that the ratio of the room sizes to each other is not balanced. The bathroom is, as already mentioned, far too small for a T-layout.

Best regards

The rooms that are important to me are so perfectly balanced.

Unfortunately, your plan is only rudimentarily dimensioned, but you can see with the naked eye that your planned bathroom is only about 2.7 x 2.6 m in size. Likewise, your pantry has a maximum depth of about 115 cm.

No, the legislator does not care what stone thickness you use to build your garage; the main thing is that it is within the magical 3.00 m distance area and does not trigger any building obligations due to its height.

The technology in the HAR, especially at the property boundary, requires on the one hand an insulated room (the technology must be housed within the insulated envelope), on the other hand, no other use than that of the garage/carport is usually permitted on the boundary. Exception: semi-detached houses.

Rhenish regards

It will be a technology room, not a utility room

But even a technical room is not a garage ;)