Is a turnkey wooden house possible under €300,000?

Would you like to briefly tell us what you know about the additional costs of a gallery?

Draw to scale two floor plans for comparison. Once, for example, 130 m² living area without a gallery, once 130 m² with a gallery, each with the desired 3 bedrooms. For the same living area, you need significantly more house dimensions and cubature with a gallery. You determine the enclosed volume in m³ by multiplying the external dimensions * ceiling height, for example 2.60 m per floor, and multiply the calculated volume by something around 400 €/m³. The difference between the building volume with/without gallery for the same living area tells you where the additional costs go with the same benefit.

May I link a house here to illustrate my ideas?

Draw two floor plans to scale for comparison. Once, for example, 130 m² living space without a gallery, and once 130 m² with a gallery, each with the desired 3 bedrooms. For the same living space, you need significantly more building footprint and volume with a gallery. You determine the enclosed volume in m³ by multiplying the exterior dimensions * story height, say 2.60m per floor, and multiply the resulting volume by something like 400 €/m³. The difference between the building with/without gallery at the same living space tells you where the additional costs go with the same benefit.

Thank you very much. I call that constructive. I'll get right to my desk.

For comparison, draw to scale 2 floor plans. Once, for example, 130 m² of living space without a gallery, once 130 m² with a gallery, each with the desired 3 bedrooms. For the same living space, you need significantly larger house dimensions and volume with a gallery. You determine the enclosed space in m³ with exterior dimensions * ceiling height, for example 2.60 m per floor, and multiply the calculated volume by something around 400 €/m³. The difference between the building body with/without gallery at the same living space tells you where the additional costs go with the same benefit.

In addition to the above point, which is exactly the biggest cost driver, thanks , there is:

- planning is more expensive
- the statics may be more complex
- consequently, the execution is also more expensive
- the increased window areas are much more expensive. Possibly with special glazing
- the windows need shading with blinds. Or will you use roller shutters for this?
- a fall protection is required
- the staircase may be more complex, e.g., flat steel staircase
- not only is living space missing, usable space is also missing. Do you want to compensate that with a basement?
- specially insulated doors due to noise transmission from below
- etc.

and it ends somewhere with lighting that is not standard Ikea 08/15.

Not to mention the additional heating costs.

...and it can gladly go on like this.

In addition to the above point which is exactly the biggest cost driver, thanks , are the;

- planning more expensive
- the structural engineering possibly more complex
- the increased window areas are much more expensive. Possibly with special glazing
- the windows need to be shaded with venetian blinds. Or do you use roller shutters for this
- a fall protection is required
- the staircase is possibly more complex. Example: flat steel staircase
- not only is living space missing, usable space is also lacking. Do you want to compensate this with a basement?
- specially insulated doors due to noise transmission from below
- etc.

and it ends somewhere with lighting that is not standard Ikea run-of-the-mill.

Not to mention the additional heating costs.

...and it can gladly continue like this

I have never been so disillusioned within such a short email. I will probably have to work a bit more this year to make this dream come true... Thanks for the info.

P.s. you can also be factual.