Single-family house - Major renovation - Change of floor plan

Hello everyone,

my wife and I are currently planning the complete renovation of a single-family house that we will be buying soon (inheritance in the family, therefore this property).

Here is the questionnaire:
Bebauungsplan/Einschränkungen
Plot size – 600 sqm
Slope – partly – 1m height difference across the plot width
Site occupancy index – irrelevant
Floor area ratio – irrelevant
Building envelope, building line and boundary – irrelevant
Edge development – no
Number of parking spaces – 1 existing garage + 1 planned carport
Number of floors – basement + ground floor + attic
Roof shape – gable roof
Style –
Orientation – SSW
Maximum heights/limits
Further requirements –

Anforderungen der Bauherren
Style, roof shape, building type – single-family house, solid construction, gable roof, built in 1938
Basement, floors – fully basement + ground floor (including 1 extension on a crawl space) + upper floor
Number of persons, age – 2 adults + planned 1-2 children
Space requirements on ground floor, upper floor
Office: family use or home office? – family use, possibly later home office
Guest sleepers per year – 5
Open or closed architecture – mixed
Conservative or modern construction
Open kitchen, kitchen island – no
Number of dining seats – 8
Fireplace – only as an option, existing fireplace not usable
Music/stereo wall – yes
Balcony, roof terrace – terrace or access to garden and terrace there
Garage, carport – 1 + 1
Utility garden, greenhouse – shed available for garden tools etc.
Further wishes/special features/daily routine, also reasons why this or that should not be

House design
Who is responsible for the planning: - DIY
What do you particularly like? Why? – bathroom size – original was too small for our taste
What don’t you like? Why? – child’s rooms 1/2 on upper floor are too narrow
Price estimate according to architect/planner: 180k for core renovation
Personal price limit for the house, incl. equipment:
Preferred heating technology: gas + solar for domestic hot water + heating

If you have to do without, which details/extensions
-can you do without:
-can you not do without:

What is the most important/basic question about the floor plan summarized in 130 characters?
How can the ground floor be designed to be as open as possible and fit couch + living wall? How can the upper floor be made more appealing?


Thank you in advance for all your input!

Floor area ratio - irrelevant
Floor space index - irrelevant

Floor area ratio irrelevant if no extension is built,
Floor space index irrelevant if no additional storey is added or the roof is otherwise raised.

Neither will the roof be raised nor extended. The exterior walls remain as they are. We just don't really like the floor plan on the ground floor and the upper floor and would like to have ideas about whether or how more can be made out of it.

Floor plan on the ground floor and the upper floor not really and would like ideas on whether or how to get more out of it.

Basically gladly, correct plans are helpful:

Built in 1938

The wall thicknesses do not correspond to the year of construction.

The indicated wall thicknesses are unfortunately correct, as they were copied from the as-built plans and checked in the house. The room sections on the ground floor, dining room and upper part of the living room ground floor, are an extension from the year 1957.

The current brick format fits 1957, but not 1938.