Floor plan of a single-family house 240 m² with a partially built-over garage

If the staircase is supposed to have a landing, then what does your specification of 420 cm mean? 419 cm is already the length of a straight, comfortably walkable staircase.

Here are a few examples

I’m waiting for your response.

I’m waiting for the completed questionnaire ;)

Another reason for the orientation of the house

Things like that and other information belong in there, also out of respect for the users who give you time here without necessarily getting important information from you. Or also to gain the exclusive answer for the property.

also. (I only know this building line as a limit.)

That is not a building line, that is a building boundary. You don’t have to build onto it, it just limits. With building lines you have to build.

Naming these mistakes would of course also be helpful

I notice that you hardly take any criticism. Only swapping kitchen/living room… but even this advice is not meant to be implemented in the floor plan you drew, but rather to keep it in mind from the start. No criticism here is abstract, but justified. Don’t you see? That may be because you expected something else. You are convinced of your draft, which is understandable, and it will remain that way—especially if the friendly architect/planner flatters you and has everything neatened up by the draughtswoman in training or even uses his lunch break to make everything look nice. But you really cannot expect much brainpower from employees who have to earn their bread with their position and still have a private life.

It’s clear that it will be expensive.

Why is that clear? You make it expensive. Building a house costs money. But if you have some amateurish ideas in mind and do not let yourself be dissuaded, then you pay for exterior walls standing on garages, elaborate statics that you don’t need with good planning, mason supplements for corners that can be cleaner, numerous distributed toilet vents over the roof, more wastewater connections than normal, garage inside the thermal envelope, dormers which are expensive and should be used thoughtfully, etc. The biggest and also expensive problem, however, is the potential defects which should be minimized by good planning.

but I can’t comprehend this considering the variety of spatial design possibilities.

… because furnishing is more than arbitrarily placing furniture?! For example, you can’t put a screen under a sloping ceiling with 12cm solid bricks. And walking into a wardrobe through a door’s walking direction makes the room feel 1-2sqm smaller. Just draw your “spatial design possibilities” in your open-space room… a nice cozy TV corner where you can find some peace is simply not possible. I think much has already been said here, even if not everything. But it should also be said that we don’t really care whether you get a nice and functional house for 600,000 to 700,000€ or none and pay 100,000€ more for it. On top of that come additional construction costs of roughly 50,000€ plus the garden landscaping. Be that as it may—everyone is the architect of their own fortune.

In my opinion, it makes little sense to go into the individual blunders of the draft in detail. You have a good budget. Don’t throw it down the drain by skimping on the architect.

I completely agree with Katja - the draft is beyond saving, you have to start all over again. It was a nice finger exercise, nothing more.

the draft is beyond saving, you have to start all over again. It was a nice finger exercise, nothing more.

Starting at the front / new / on a blank sheet, I often recommend and do so out of conviction. If the draft was indeed only supposed to be a finger exercise, then saving it is correspondingly not necessary / advisable. However, we (still) do not know what kind of finger exercise it was supposed to be: one with the goal / claim that the fingers would gradually become more skillful, or is the "Infinite Monkey" strategy being pursued instead? – the statement ...

was also discussed with and is unrecognizable compared to the first drafts.

... leaves room for the assumption that at least in the self-perception of the lay designers, an increasing learning curve is recognized.

A first final drawing is currently in progress (which may then include static and building services corrections),

... further suggests that one might believe to have already approached a target level aimed at in terms of design quality –

the plan attempts to provide similar areas on two floors.

... would, however, be an indication of blindness to logical connections / conceptual basics, as this naturally contradicts a full-storey upper floor (-attic floor) not possible here. Even if the number "42" in the member name presumably only catalogs the previous finger exercises symbolically like "4711," "08/15," or "148,713," as I said, I would at least be very interested in a selection of the iterations "1 to 41." There should – regardless of learning curve or Infinite Monkey – already have been valuable approaches included. Or were here merely the corner edges of the wall courses refined?

Has he already signed off after two days, ?