Semi-detached houses one after another and not identical in profile?

Thank you for the correction - I mean must! Normally, it must be created profile-matched.

Good, but it is definitely not specified here. I even find it nicer if this brings some variety.

Hello,

What costs are to be expected for the additional insulation and the dismantling (does that have to be done, wouldn’t it just be better insulated, right?)?

There are 2 possibilities and I assume that neither will be to your liking - maybe understandably so. You have a building envelope within which you must move; assuming it is 6.00 x 12.00 m and you plan to build monolithically:

[*]The first option is to treat the semi-detached house like a detached single-family house and build all around with a masonry wall of 36.5 cm; recessed by 2 cm from the future neighbor. In this variant, you can relax and won’t have to dismantle anything later. However, this comes at the price of a reduced floor area by 12.5 cm plus exterior plaster across the entire depth and all floors.
[*]You discuss with your future partner whether you may build over the building boundary for the protection of your semi-detached house with insulation until his construction begins. If he agrees, you obviously have to dismantle it later; or rather not you directly. Your partner’s builder will take care of that, but of course, you will have to pay for it.

How much that costs, I cannot tell you; it depends on many factors; not least on whether you build monolithically or with ETICS. Certainly, however, it depends on your building partner’s pricing structure.

But for the architect planning the 2nd house, shouldn't it be no problem to orient himself on the 1st house (even if not identical in profile) and to realize a harmonious overall design, right?

Of course

Best regards from the Rhineland

We have now received feedback that we each need to register an attachment easement so that we are really allowed to build up to the boundary (as is usual with a semi-detached house). However, the easement can only be registered once both approval processes are underway. Does anyone know about this? I thought when you buy a semi-detached house plot, it is also clear that you are allowed to build right up to the property boundary. So, you really have to wait until both parties are at least so far along that the approval planning is finished.

That would be new to me. I always thought building encumbrances could be registered practically at any time ... Or is that "can" a "want"?

He spoke of having to. It also surprises me. It could also be that the plots are not built on promptly (e.g. because plot 2 has not yet been sold). The seller of plot 2 could already have a building encumbrance registered so that building on plot 1 can proceed. Otherwise, as the owner of plot 1, one might have to wait forever until the buyer of plot 2 has bought, planned, etc.