10.5 m long garage as boundary construction

Hello everyone,
I want to build a 10.5 m long garage as a boundary building. However, the development plan stipulates that the max. length of a garage as a boundary building is 9 m and all boundaries on the property may be max. 15 m.
I want to accommodate 2 cars, but my building window is max. 3 m wide.
My question: Is it possible to place 2 standard garages 5 cm apart one behind the other (without a wall and gate)? This would mean the length of 9 m per garage is significantly undercut as well as the total length of 15 m.
Many thanks in advance!
Best regards, Klaus

Which federal state? The 9m usually apply per side, such tricks will have no effect. Either find another solution or accept illegal construction in coordination with neighbors and the later forced demolition as a risk.

Hi, it would work via a building encumbrance with the neighbor.

We are building an 11m long garage on the boundary in SH and the architect has prepared a document where the neighbors have signed and the [bearbeiteten] said she will check if that is enough for you, otherwise we would probably have to do a building encumbrance or something like that.

but my building window is max. 3 m wide.

You can't believe that!

However, the development plan stipulates that the maximum length of a garage as a boundary structure may be 9 m and all boundaries on the property may be a maximum of 15 m.

The length limits come from the state building code. If your development plan additionally contains regulations regarding the garage, you have to solve two problems at once, one related to building regulations (solution: neighbor's consent / building encumbrance) and one related to planning law (solution: exemption application). Show a site plan with the construction project and development plan.

My question: Is it possible to place 2 standard garages 5 cm apart behind each other (without wall and gate).

No, unless the above-mentioned solutions apply.

That would clearly fall short of the length of 9 m per garage

Per garage yes, but not per neighboring boundary, since the total length of the boundary structure counts. Literally (§6, para. 8, sentence 2, Building Code NRW): Die Gesamtlänge der Bebauung nach Satz 1 Nummer 1 und 2 darf je Nachbargrenze 9 m und auf einem Grundstück zu allen Nachbargrenzen insgesamt 15 m nicht überschreiten.

My question: Is it possible to place 2 standard garages 5 cm apart, one behind the other (without wall and gate).

Hello, after the building inspection when laying the floor, we noticed that the interior wall of the room is 10 cm wider on one side than at the other end of the wall.

There are several concrete slatted floor elements from a former stable (length 1.8 m, 2.6 m, and 3.5 m respectively. About 15 cm thick each) available. I would like to use these as a basic framework.

Honestly: last night I already wondered a little bit whether it was Christmas or April, or whether one of the digestive schnapps might not have been completely fresh.