Floor plan design of a 9x13m gable roof house with an attached 6x9m attic

313 is not negotiable and a 3m distance to 313 would also be planned/maintained A positively approved building inquiry with the specified dimensions is available. If it doesn't fit exactly with the 6/9 m for the attic and house, then it will just be a few centimeters narrower

You are making the same mistake as we did 10 years ago: although there is an office on the ground floor, which can be set up as an emergency bedroom, and there is a shower toilet, which is nowhere near as comfortable as a proper bathroom, you are planning (as we did) to have all the sleeping comfort on the top floor.

At that time, I had presented my floor plan here myself, and unfortunately, I was not advised that 10 sqm more on the ground floor provide much more age-appropriate comfort and make the upper floor unnecessary in case you are no longer able to manage it.
So now your office is not suitable as a shared bedroom!
Therefore, I advise you to plan more space downstairs and less upstairs and to leave guests or office and sports upstairs.

Regardless of that:
The draft has many issues. Literally, it makes the house full of obstacles, the opposite of barrier-free. It feels like the house consists only of storage rooms and annoying corners without any added value.
- The garage is located on the south and blocks valuable windows for daylight, so it will be very dark in winter. If it absolutely must be attached to the existing house, then the house itself should be pushed further back (west). If that is not possible due to the building application, then the air space should be planned exactly on the south side to bring light into the house through corresponding windows.
- The airlock at the living room is a second hallway.
- The toilet is in the dirty zone of the entrance door.
- The hallway upstairs is full of corners that either disturb in the dark or when placing the wardrobe lead to narrow spots.
- The so-called gallery is blocked with fitness equipment, which, if placed correctly for use and distance, is located in the middle of the free space.
- The bedroom is made a passage room. A sick or resting person is disturbed by the other’s activities.
- The bedroom is located next to a busy street.
- The bed is too narrow; if it were a real 180 or 200 cm, there would already be a chair in the way. It gets tight.
- The bathroom door hits the wet area in front of the shower.
- The washbasin is positioned so that you stand in your own light.
- The air space has no connection to the dining area and apparently has not really been planned. Instead, a hole was simply left in the ceiling.
- Regarding the so-called tilt windows, I am out of the loop. Do you mean roof windows? They apparently do not exist in the specified dimensions and would be an expensive special order.
- The doors are less than 90 cm wide.

The kitchen is a dead-end, which some actually like, so no criticism here, but it is worth mentioning. The same applies to the balcony: why do you need it? How do you get to it? But if someone absolutely wants it, then they just spend more money on it.
You are planning nearly 57 sqm of auxiliary and cellar replacement rooms on the living floors (excluding necessary hallways), but you are still planning an additional cellar for crafting and hobbies.

Costs: €540,000 for 180 sqm of living space, plus a cellar costing €120,000–150,000,
double garage €40,000
That totals €700,000–750,000
Plus ancillary building costs plus paving.

The objection regarding the small rooms is justified. One could indeed significantly enlarge the currently small guest room (you call it an office) and combine it with the narrow room next to the kitchen to create a large (potential future bedroom). All the stuff currently in the storage room between the garage and the living/dining area will then have to go to the basement, and this room could then be used as a large utility room with washing machine, dryer/storage. As for the location of the gallery: the sunny side with a nice view of the greenery is "unfortunately" rather the west side. To the south stands the 10m high neighboring building and the long adjoining extension, which is only "3m high but has a 3m high fire wall on the adjoining side. With south-facing windows, one would always be looking at a 6m high, windowless wall.

Otherwise, I/we indeed have too many hobbies and too much stuff that has accumulated over the years. What is drawn as furniture in the floor plans (except for the kitchen and a few of the shelves plus the wardrobes in the dressing room) are all already existing pieces of furniture (including a 1.60 bed), which we would also like to keep. As far as the basement is concerned, a partial basement (roughly 50% of the floor area in the middle) would probably be sufficient (if it is financially worthwhile). I would like to "capture" the light on the south side of the upper floor with 3 [Dachfächenfenstern].

- The door in the bathroom opens into the wet area in front of the shower
- The washbasin is positioned so that you stand in the light yourself

How would you want to redesign the bathroom on the upper floor given the position of the window facing the street?

btw. our current shower toilet has about 3 square meters, so the 5.6 square meters planned for the guest toilet on the ground floor already seemed generous to me.

- The garage is located on the south side and blocks valuable windows for daylight, so it will be very dark in winter. If it absolutely has to be attached to the existing house, then the house itself should be moved further back (west). If this is not possible due to the building permit, then the air space should be planned exactly on the south side in order to bring light into the house through corresponding windows.

This is what the existing property looks like to which the double garage is to be attached.
Unfortunately, there are no nice views from windows to the south or southeast.