Building a workshop directly attached to the house - what should be considered?

Hello everyone! The building authority is interfering with us. We originally wanted to build a freestanding workshop ("garage" and no car is supposed to ever drive in it) as a boundary construction. Since it is a corner plot, however, we have to keep 5 meters of "front yard area" free. The workshop must now be built directly onto the house. We wanted to build the workshop ourselves. The house is being built by a company. Now we are wondering: Can we also build the workshop directly adjoining the house on our own, or does the house builder have to be involved now (e.g. because of the connection)? We really want to do it ourselves, especially to save money. Questions in particular: - For the workshop, do you only build 3 walls and the 4th side is the wall of the house, or do you build four walls and connect the house wall with one wall of the workshop? - If yes: How do you connect the sides (house and workshop – also to avoid cracks in the plaster)? - Can we get the plaster of the workshop to look like that of the house? (we don't think we will be as fast as the house building company with the construction of the workshop) - Should we have the house completely plastered by our house builder or leave the area where the workshop adjoins unplastered? What are the advantages and disadvantages of that? Many thanks in advance to the forum!!

Have you already thought about a prefabricated garage?

Get an offer from your construction company for the garage. And then, if necessary, another offer just for the concrete slab (this doesn’t make sense in [EL] if the company is already doing the slab for the house).

From the way it sounds, you are not very experienced in house construction (please don’t take it the wrong way...). Therefore, the recommendation is to have your construction company also carry this out due to the many interfaces.

Did you register the garage as a workshop or what does the building authority care? Or do you want to work commercially?

Have you already thought about a prefabricated garage?

Get a quote from your construction company for the garage. And then possibly also a quote just for the foundation slab (that doesn’t make sense in EL if the company is going to do the slab for the house anyway).

From the way it sounds, you’re not particularly experienced in house building (please don’t take it the wrong way...). That’s why the recommendation is to have your construction company handle this as well because of the many interfaces.

Yes, we will definitely have the foundation slab done right away.
We basically want to get a quote for the construction – but also (if the quote is too expensive) know how to proceed ourselves.

Thanks for now!

Did you register the garage as a workshop or why does the building authority care? Or do you want to work commercially?

No, nothing commercial. Just a workbench for the man of the house and stuff like that.

Since the garage was originally supposed to be a boundary development, an application was necessary.