City villa with 165 sqm - first ideas?

Hello everyone,

just a brief note: we are still at the very beginning of the planning process and are complete beginners here... but we want to be well prepared for the first discussions and for us it is mainly about finding out whether "we are on the right track" and whether our planning roughly fits at all. The furniture has only been placed sporadically.

We want to build a city villa with approx. 165sqm – important to us on the ground floor is a guest room that can ideally be used as a master bedroom later, as well as a guest WC with shower.
Upstairs, three children’s rooms plus master bedroom as well as a small "workroom" for sewing machine, vacuum cleaner, nocturnal guinea pigs.

Plot size 1,100sqm, NE location, house will be centered on the plot, driveway and parking spaces to the right with passage through the utility room
Slope no
Site floor area ratio 0.3
Floor area ratio ?
Building window, building line and boundary ?
Edge development ?
Number of parking spaces 2
Number of storeys 2
Roof type hip roof 25 degrees
Style modern city villa
Orientation of main entrance southwest
Maximum heights/limits 10m
Other requirements?

Requirements of the builders
Style, roof shape, building type
modern city villa hip roof 25 degrees
Basement, storeys 2 full storeys without basement
Number of persons 5

House design
Who created the planning?
self-designed

What do you like especially? Why?
three relatively equally sized children’s rooms, open dining/living area on the ground floor

What do you not like? Why?
guest room relatively small, difficult to use later as master bedroom
master bedroom upstairs small
bathroom upstairs above the living room (possibly insulation of the waste pipes?)

Why is the design as it is now?
first approach from us as "laypersons" that contains all rooms relevant to us at first, but can certainly still be optimized

I don't think the basic layout is wrong - but the kitchen won't work like that. Depending on whether an island is important to you, it needs to be solved differently. What I notice on the upper floor is that an extremely large amount of space is wasted on the hallway; I would reconsider the layout there. For five people, the bathroom might also be a bit too small, although that is very subjective.

I would really like something like this with such or similar dimensions (just as inspiration):

It makes no sense to make the hallway on the upper floor so large; it can be reduced and the rooms made bigger instead. Without artificial light, the hallway upstairs is completely dark. The bathroom would be definitely too small for me with 5 people.

Best regards
Ssbine

Bedroom does not work with the dimensions ... Bathroom theoretically has the sewage pipe running through the living area. Probably would not want to build it that way. Stair height on the ground floor is not sufficient for a door.

a guest room on the ground floor, which ideally will later be used as a master bedroom

Why?

Thank you for all your suggestions, my husband has tinkered a bit more. The bathroom is currently under 7 sqm - bigger would of course be great, but the children's rooms are more important to us. Do you have any ideas about this rough layout?

Why?

We want the children (all still quite small now) to have their own "children's floor" upstairs when they are a bit older, so definitely the shower downstairs in the guest WC; this way the (rather small) bathroom upstairs is effectively only for the children.