Assessment & assistance semi-detached house, approx. 180 sqm in DIY floor plan

Hello everyone,

we have purchased a 337 sqm plot on which we now want to build our semi-detached house. We are in talks with various construction companies and the approach is unfortunately always different. Since we are often presented with floor plans based on our key data that we do not like at all (often a standard 8/15 semi-detached house), we have started to think for ourselves. It is also quite different that one company has a problem with the statics on the ground floor with 8x12m and another company does not. Likewise, our wish is to place the technology in the attic (see separate thread).

Now I would like to have your assessment of our DIY floor plan. Does that make sense? What have we not considered? Feel free to also make constructive counter-proposals, as I don’t really like, for example, the bathroom/office solution on the upper floor.


Development plan/restrictions
Size of the plot: 337 sqm
Slope: no
Site coverage index: 0.35
Floor area ratio: 0.7
Building window, building line and boundary: 12m length, plot is 11.5m wide, so ergo 8.5m???
Edge development
Number of parking spaces: 2
Number of floors: 2.5
Roof type, gable roof 30 degrees, no knee wall
Style
Garden side orientation completely south
Maximum heights/limits: 12m length, 6.5m eaves
Further requirements: neighboring semi-detached house will also be built later without a basement with the dimensions 8.5x10.10, smaller than ours


Requirements of the builders
Style, roof type, building type: no special requirements
Basement, floors: no basement, 2.5 floors
Number of persons, age: 38, 38, 2, x ;)
Space requirements on the ground floor, upper floor: ground floor airy bright, spacious, upper floor 3 bedrooms, bathroom, study
Office: family use or home office? HO
Overnight guests per year, every 3 months a couple sometimes
Open or closed architecture: open
Conservative or modern construction: modern
Open kitchen, cooking island: open with island
Number of dining places: 6
Fireplace: no
Music/stereo wall: no, TV on wall
Balcony, roof terrace: terrace (added later)
Garage, carport: none, because garage space is very disadvantageous
Utility garden, greenhouse
Further wishes/special features/daily routine, also reasons why this or that should not be

-House technology preferably in the attic, since we mostly stay on the ground floor and want to have a lot of space there
- Standard floor plan with U-staircase to be avoided if possible, therefore also the compromise on the ground floor of a V-staircase with glass railing, open without storage under the stairs, ground and attic floor spiral staircase
- Lots of window area, lift-and-slide windows on the ground floor with external blinds, as it is the south side
- Kitchen/couch somewhat separated and not too close to each other
- Ceiling height ground floor at least 2.65m
- Use the roof cellar incl. slopes

House design
From whom is the planning: DIY
What do you particularly like? Why? Open living area, open staircase
What do you not like? Why? Bathroom/office on the upper floor
Price estimate according to architect/planner: 450k
Personal price limit for the house, incl. fittings: 550k
Preferred heating technology: heat pump,

If you have to do without, which details/extensions
- can you do without: pantry ground floor, “even more” windows
- cannot do without: separate office

Why did the design turn out as it is now? e.g.
A mixture of many examples from various magazines...
What makes it particularly good or bad in your eyes? Good, because it does not conform to the standard and conveys a spacious, bright feeling of space

The stairs look different in size on each floor? How is that supposed to work?

My first thoughts:
- The bedroom passage between bed and wardrobe is too narrow. Even with sliding doors.
- Hallways will be dark.
- The construction on the ground floor with the large window fronts will be expensive.
- Is the neighbor already building? Is he building with or without a basement?
- Do you have dimensioned drawings / plans?

The stairs look different in size on every floor? How is that supposed to work?

On the ground floor, it is a V-shaped staircase, on the upper floor and attic floor then a U-shaped staircase. Everywhere 1m wide. In the attic floor I just measured, there I only set 90, that would of course become a bit wider. Otherwise, I have learned that it is not a problem if the profile changes.

My first thoughts: - Bedroom doesn’t fit between bed and wardrobe, no passage. Not even with sliding doors - Corridors become dark - The construction on the ground floor with the large window fronts will be expensive - Is the neighbor already building? Is he building with or without a basement? - Do you have dimensioned drawings / plans?

- I also had the thought about the bedroom, maybe take something away from the children's room - Which corridors exactly? The stairs will not be concrete but an open stringer staircase, so the corridor on the upper floor should also get some light. Otherwise, I wouldn’t know how to arrange it differently in a semi-detached house - I know :) - Also without a basement, timber frame, will only start after us - Unfortunately not, only from the tool, are there better tools for that? The dimensions of the house are 8x12m

Why is the 2nd children's room to the north and the parents' bedroom to the south?

Unfortunately, the entire dimensioning of the floor plan is missing, but the issue with the stairs will not work out, because one of the walls from the upper floor stands above the stairwell to the ground floor and there will be problems with head clearance.

How is the neighbor building? Flush with you?